Get help on our basic JavaScript and Algorithms Challenges. If you are posting code that is large use Gist - https://gist.github.com/ paste the link here.
@sjames1958gm cool, that works, any other?
@colorpanda2011 That is probably about it.
@sjames1958gm sorry, that doesn`t work.
you mean if i use a.num outside the object ,it won't work?? @jarenescueta731
@sjames1958gm have to put the else if in it.
@colorpanda2011 let me see?
@sjames1958gm what is the name again?
thank Yall I have been hacking at this one most the day between wrestling with the Kid's & soothing the new Littlest one.
@varun29 sorry, i was talking about private variables but you asked about private properties. now i'm not sure if i'm confusing myself
@colorpanda2011
function getIndexToIns(arr, num) {
// Find my place in this sorted array.
arr.sort(function(a,b){ return a-b; });
for (var i = 0; i < arr.length; i++) {
if (num <= arr[i]) return i;
}
return i;
}
@varun29 gonna look at the challenge
so can you please nust have a look at the challenge??
@jarenescueta731
@varun29 ok so the point of private properties is so you have control over how the object's info is used in outside code
Hey all, I am so lost on "Record Collection", I have no idea even where to start.
@jarenescueta731 how to use these function?
@varun29 for this challenge, your methods will be public, only the gear variable will be private
@varun29 it's just to show that you can't change the value of gear from outside the object
@varun29 it already gives you examples of public methods
@varun29 a private variable is simply declaring and assigning the variable inside the object
@jarenescue?
@ChadDean82 No worries man. I know the pain. It's always just that little bit that stumps you. Keep at it man! You'll be pro in no time
@AidenMead can you post the challenge? I'm assuming it is object properties?
we declare a variable inside the function in order to make it private.right?
function truncateString(str, num) {
// Clear out that junk in your trunk
if ( str.length > num ) {
str = str.slice(-str.length, num);
str +="...";
}
return str;
}
@jarenescueta731
@pacificfrost it is, bear with me and I'll post it
@AidenMead "collection" is an object of objects
@frontender007 what are you trying to do?
str.slice(-str.length, num) that removes from the beginning, doesnt it?
@AidenMead you need to refer to all the objects using a for loop (by contacts[i])..and check for the properties.
hi guys, can you help me?
Hello on the palindromes challenge, it says the argument should return false, im getting true, and all non-alphanumeric characters are supposed to be removed
function palindrome(str) {
// Good luck!
str = str.replace(/[^A-Za-z]/g, '');
str = str.toLowerCase();
var strArray = [];
for (var i = 0; i < str.length; i++) {
strArray.unshift(str[i]);
}
strArray = strArray.join('');
console.log(strArray === str);
if (strArray !== str) {
return false;
}
return true;
}
palindrome("1 eye for of 1 eye.");
my js works until you loose on strict mode, do you know what is the problem?
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
@ChrisGitter I 'm at truncate a string challenge
you are removing alpha numeric chars, aren't you?
@Promhize
yes
@Sperkajugglite yes
i mean, you are supposed to remove non-alpha, right?
@varun29 yes! you declare the variable inside the function to make it private. it's all about localization. sorry for the delay i had to be afk for a sec
@Promhize you are removing alphanumeric
@Sperkajugglite yes i am removing non-alpha
your code is removing alphanumeric chars
try \W
and \D
@Sperkajugglite okay, will try that out, thanks
promhize sends brownie points to @sperkajugglite :sparkles: :thumbsup: :sparkles:
:cookie: 305 | @sperkajugglite |http://www.freecodecamp.com/sperkajugglite
np :P
@jarenescueta731 so we cannot manipulate it from outside?
Hi Guys .I am not being able to make sense to make "result" below my codes even though after reading full instructions.My code is
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat", "little", "hit", "slowly");
@Sperkajugglite i think /w doesnt remove - and _
@Promhize also check out regex101.com it's great for testing regular expressions str.match() replace() etc...
@Promhize, then use [-_ ]
How do you post the code in here? I can't seem to figure it out
thatll do
@frontender007
if (num > 3) {
return str.slice(0, num-3) + "...";
} else {
return str.slice(0, num) + "...";
}inside your if statement
@varun29 no you cannot from the outside, that's what makes it "private"
@AidenMead you use ```
then close with ```
```// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
```
@Sperkajugglite hmm, will try that. @jarenescueta731 thanks
:cookie: 321 | @jarenescueta731 |http://www.freecodecamp.com/jarenescueta731
:warning: promhize already gave sperkajugglite points
promhize sends brownie points to @sperkajugglite and @jarenescueta731 :sparkles: :thumbsup: :sparkles:
help format
:point_right: code formatting [wiki]
Multi line Code
```js ⇦ Type 3 backticks and then press [shift + enter ⏎] (type js or html or css)
<paste your code here>,
then press [shift + enter ⏎]``` ⇦ Type 3 backticks, then press [enter ⏎]
Single line Code
This an inline `<paste code here>` code formatting with a single backtick() at _start_ and _end_ around thecode`.
See also: ☛ How to type Backticks | ☯ Compose Mode | ❄ Gitter Formatting Basics
put ```at the end too
help simon? :laughing:
no wiki entry for:
simon laughing
haha, I feel so silly right now, i can't seem to get it to work!
@Promhize did it work?
@AidenMead "
code here"
"
" code here ""
fuck
don't know how to show you
@Sperkajugglite :D it worked. Thanks
promhize sends brownie points to @sperkajugglite :sparkles: :thumbsup: :sparkles:
:warning: promhize already gave sperkajugglite points
@Promhize np
@AidenMead just put three
before and threeafter!
atutus
oh
one woks too
didn't know that
`
// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");`
'code'
code
autut
yes
las one you did worked
do the same
hmmm, so it works if I type it out, but if I copy and paste code in between my "`" marks, it just prints it normal
@pacificfrost should My 7-8 have the value of =0 or how would I write that to match?
@AidenMead idk i always paste
One more try, I'm sorry if this doesn't work and I spam you all with the challenge one more time XD
`// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");`
dude, try with three
Hmm, i give up, sorry all!
@AidenMead last try?
lol, ok
```// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
```
var count = 0;
function cc(card) {
// Only change code below this line
switch (card) {
case 2:
case 3:
case 4:
case 5:
case 6:
count++;
break;
case 7:
case 8:
case 9:
count =0 ;
break;
case 10:
case 'J':
case 'Q':
case 'K':
case 'A':
count--;
break;
}
if (count < +1)
{return count + "Hold";}
else if (count >1)
{return count + "Bet";}
return count;
// Only change code above this line
}
// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');case 2:
case 3:
case 4:
case 5:
case 6:
count++;
break;
case 7:
case 8:
case 9:
count =0 ;
break;
@AidenMead i really don't know whats going on now, it should have worked this time
can you guys help me with the error?
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
Haha, I think it's somehow just me. Thanks for the help, though, @Sperkajugglite !
aidenmead sends brownie points to @sperkajugglite :sparkles: :thumbsup: :sparkles:
@ChadDean82 i think in case 7... it should not equal 0
:cookie: 306 | @sperkajugglite |http://www.freecodecamp.com/sperkajugglite
@ChadDean82 maybe it shouldn't add anything
@ChadDean82 so, just don't do anything there
i don't remember the challenge rules
but try that
btw my simon doesn't look good on small screens yet
@Sperkajugglite so take code 7-8 out completely?
@ChadDean82 if its 7 you shouldn't add, right?
@ChadDean82 if so, just delete it, right now you are assigning count to 0
right on now My return on console is 0Hold guess there is something wrong with the if statement's?
you're setting count to 0
its equal to 0 (< 1), so it will return count (0) + "hold" (you should add one space before hold, like this " Hold")
that's different to adding 0
everyone have a good weekend!
@llamatarianism @ChadDean82 thats what i said
Hi Guys , How can i create a "result " string inside the following function.
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("dog", "big", "ran", "quickly");
format help
result = my noun + .... ?
does capitalize method work in JS, am working on Title Case a Sentence challenge?
i think it doesn't
try just toUpperCase with index 0
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
can anyone help me :innocent: ?
thanks @Sperkajugglite , how would I do it for each word though?
amran16 sends brownie points to @sperkajugglite :sparkles: :thumbsup: :sparkles:
:cookie: 307 | @sperkajugglite |http://www.freecodecamp.com/sperkajugglite
@rahin1122 you can have the result string say anything, then use concatenation (fancy word for combining strings with other strings or variables) of that string and the parameters.
Something like
Something like
var result = "My " + my Adjective + myNoun + " would always " + myVerb + myAdverb;
@amran16 loop for word in string, word[first char].toUpperCase
?
is anyone alive?
does anyone have a problem, does anyone have a solution http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0010
:P?
:P?
thanks
np
@HKuz thank you
rahin1122 sends brownie points to @hkuz :sparkles: :thumbsup: :sparkles:
:cookie: 419 | @hkuz |http://www.freecodecamp.com/hkuz
@rahin1122 no problem, cheers
@HKuz Its not working following your instructions .What is it basically i am not being able to understand logic .
Hello everyone! Can anyone explain to me what is test[i] in the following code? Is the if statement checking each letter in test?
function mutation(arr) {
var target = arr[0].toLowerCase();
var test = arr[1].toLowerCase();
for(var i = 0; i<test.length; i++){
if (target.indexOf(test[i]) < 0)
return false;
}
return true;
}
mutation(["Hello", "hey"]);@rahin1122 hmmmm, what about something like this:
// Your code below this line
var part1 = "My ";
var part2 = " would always ";
result = part1 + myAdjective + myNoun + part2 + myVerb + myAdverb;
// Your code above this line
return result;I can't remember the exact instructions for that problem
you need spaces inbetween the words
@labanch have you tried logging
indexOf(test[i]) to see what it outputs?
result = myAdjective + " " + myNoun + " " + ...
@no-stack-dub-sack good idea! I'll try that now
@llamatarianism ah yes, good call
can you help me http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0110
would any care to critique my wiki viewer? I programmed in an easter egg which was fun. All searches will look the same unless you enter "phish". Open to feedback on the code, design suggestions, constructive crit, etc. Thanks!
http://codepen.io/no_stack_dub_sack/full/akLkZP/
http://codepen.io/no_stack_dub_sack/full/akLkZP/
help Record Collection
:point_right: challenge record collection [wiki]
Challenge Record Collection
:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
:checkered_flag: Problem Explanation:
You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unique id number and has several properties. Not all albums have complete information.
Write a function which takes an id, a property (prop), and a value.
For the given id in collection:
If value is non-blank (value !== ""), then update or set the value for the prop.
If the prop is "tracks" and value is non-blank, check to see if the given element in the array has the property of "tracks". If the element has the property of "tracks", push the value onto the end of the "tracks" array. If the element does not have the property, create the property and value pair.
If value is blank, delete that prop.
Always return the entire collection object.
:pencil: read more about challenge record collection on the FCC Wiki
@no-stack-dub-sack ok so it outputs each letter. I didn't know that you can access each letter in a string using bracket notation. I thought this was only used to access an element in an array or when accessing properties in objects
@labanch yup, works the same way
@no-stack-dub-sack cool! Learned something new. Thanks
labanch sends brownie points to @no-stack-dub-sack :sparkles: :thumbsup: :sparkles:
:cookie: 287 | @no-stack-dub-sack |http://www.freecodecamp.com/no-stack-dub-sack
@labanch no prob! That's what it's all about!
@no-stack-dub-sack looks great!! :P
@Sperkajugglite Thanks! Let me know if you have any suggestions!
no-stack-dub-sack sends brownie points to @sperkajugglite :sparkles: :thumbsup: :sparkles:
:cookie: 308 | @sperkajugglite |http://www.freecodecamp.com/sperkajugglite
doesn't load pages yet?
@HKuz I was forgetting to put ending curly braces .It has matched finally .Thank you very much.
@rahin1122 sweet!
http://codepen.io/Sperkajugglite/pen/JKyGJd?editors=0110 btw, guys I'm trying to figure out whats wrong with my simon, when you loose in strict mode it breaks :P
do you know what could be wrong? :innocent:
please, :cry: ?
Hey guys, quick question: Can i practice with javascript offline? Like, if I make an html page through notepad++ and incorporate some javascript in it, will it work?
@Robinsond7691 sure bro
@drez14 thanks man, sounds good.
robinsond7691 sends brownie points to @drez14 :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for drez14
hi guys, I know this isnt the most efficient way but could anyone help me add class on scroll? do I have to do .height or .top to my position vars?
$(document).ready(function(){
function scroller() {
function aboutAdd() {
var aboutActive = $("#nav-about").addClass(".nav-active");
$("#nav-portfolio").removeClass(".nav-active");
$("#nav-contact").removeClass(".nav-active")
};
function portfolioAdd() {
var aboutActive = $("#nav-portfolio").addClass(".nav-active");
$("#nav-about").removeClass(".nav-active");
$("#nav-contact").removeClass(".nav-active")
};
function contactAdd() {
var aboutActive = $("#nav-contact").addClass(".nav-active");
$("#nav-about").removeClass(".nav-active");
$("#nav-portfolio").removeClass(".nav-active")
};
var aboutPos = $("#about").offset();
var portfolioPos = $("#scroller").offset();
var contactPos = $("#contact").offset();
$(window).on("scroll" , function() {
if (aboutPos > portfolioPos && aboutPos > contactPos {
aboutAdd();
}
else if (portfolioPos > contactPos && portfolioPos < aboutPos){
portfolioAdd();
}
else if(contactPos < portfolioPos && contactPos < aboutPos){
contactAdd();
}
else{
$("#nav-about"),removeClass(".nav-active") ;
$("#nav-portfolio").removeClass(".nav-active");
$("#nav-contact").removeClass(".nav-active");
}
});
};
});
Hi all,
I'm struggling to get 'Comparison with the Greater Than Operator' section to work.
Here my code:
function testGreaterThan(val) {
if (val > 15) { // Change this line
return "Over 100";
}
if (val > 10 ) { // Change this line
return "Over 10";
}
return "10 or Under";
}
// Change this value to test
testGreaterThan(200);
you can only have one if statement
@baileyl91
@baileyl91 you should have
if{
}
else if{
}
else{
if{
}
else if{
}
else{
if, else if, then finally else
going to stream a twitch overlay I started today on FCC twitch channel
@willcodes
I understand where you are coming from, but that the code they give on the topic section.
I have managed to get it work, did not need else for some reason.
It was to change the value of 'val' to match each testing statement.
I understand where you are coming from, but that the code they give on the topic section.
I have managed to get it work, did not need else for some reason.
It was to change the value of 'val' to match each testing statement.
hello all, help!!
Why Am I getting NaN here?
function convertToF(celsius) {
var fahrenheit;
// Only change code below this line
var celcius;
fahrenheit = celcius * 1.8 + 32;
// Only change code above this line
return fahrenheit;
}
// Change the inputs below to test your code
convertToF(30);
@sirvanux use the fraction of 1.8
I'm not exactly sure why...posibly because it's a decimal number?
i think its the same (9/5)
celcius is spelled celsius...
@sirvanux celcius is spelled celsius...
thats it let me try
hey guys i fixed my code but it seems it got stuck on one pic. Could you try this please and tell me if it works (http://codepen.io/Ash717/full/bZajEO/)
@jesushilariohernandez thanks my friend i was getting crazy here
sirvanux sends brownie points to @jesushilariohernandez :sparkles: :thumbsup: :sparkles:
:cookie: 175 | @jesushilariohernandez |http://www.freecodecamp.com/jesushilariohernandez
@sirvanux use the parameter, don't declare a var (celsius) inside your function
@sirvanux thanks man... I know the feeling!!! I'm stumped right now...too.
jesushilariohernandez sends brownie points to @sirvanux :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for sirvanux
it was the typo
anyone?
celcius intead of celsius
@jesushilariohernandez review array manipulation methods: pop, push, shift and unshift, you need 2 of them
@Chrono79 Thank you sir...
jesushilariohernandez sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
:star2: 1541 | @chrono79 |http://www.freecodecamp.com/chrono79
>
@Ash717 you are using = instead of == or === in your if conditions
alright
@Chrono79 thank you
ash717 sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
:star2: 1542 | @chrono79 |http://www.freecodecamp.com/chrono79
@Chrono79 does it work now?
yes
hello guys i'm new here :smile:
Hi all, I'm trying to change the background color for my webpage but can't figure out why my code is not working. I've tried many different approaches found on stackoverflow (as recent as 2015), and have even tried doing it the way like W3Schools (http://www.w3schools.com/jsref/prop_style_backgroundcolor.asp). This hasn't worked. Can anyone help look at my code and figure out what's wrong with it? My fiddle is here: https://jsfiddle.net/2aexjra5/
getCurrentPosition() and watchPosition() are deprecated on insecure origins. To use this feature, you should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.
@Chrono79 thank you!
ash717 sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
:warning: ash717 already gave chrono79 points
why does the console says this when I try to access location data with naviagor.geolocation?
@periman2 you're using Chrome, don't you?
yes I do
native browser geolocation in Chrome is restricted to https
@Chrono79 thanks again!
:warning: ash717 already gave chrono79 points
ash717 sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
@Ash717 no problem
but other examples that use geolocation made in codepen work fine in chrome how is that possible?
what should I do? switch browsers?
@periman2 I had that problem yesterday, be aware that you can access your codepen both in http and https
@periman2 I had that problem not only with the geolocation but also with loading external JS \ CSS over http and not https for example fontawesome
@periman2 yeah, link to the codepen through https, or you can use an https api call... I used weather underground for it personally
@periman2 You can use geolocation if it runs on https and make a fallback to an api based on IP (which is over http)
@Wo1v3r @Benalron how do I link the codepen through https I have no idea how to do that...
need help on challenge "accessing objects properties with bracket notation" says i need to use bracket notation twice but i have the other answers just won't work with bracket notation any way i put them
the ip api isn't accurate enough though as it seems to return the weather at my provider (150km from my city) so I'll do that fallback from geolocation l8r
@periman2 either open your codepen with https:// prefix
and the exercise suggest opeweathermap api which is https as I just only now checked
@periman2 or add another codepen with https:// prefix through the js menu (just add the link in the js settings -> external js)
that's what you would also do for a callback with jsonp (add another codepen as an extension)
so its good to get used to it
@periman2 you can make https requests over http but not the opposite
disregard what i just said in the last line im a bit confused, I need to go to bed XD
@Wo1v3r haha don't worry about it thank you for your help I'll see what I can do right now
periman2 sends brownie points to @wo1v3r :sparkles: :thumbsup: :sparkles:
:cookie: 279 | @wo1v3r |http://www.freecodecamp.com/wo1v3r
np goodluck you can pm me if you need help night :)
night :)
@sansae
$(document).ready(function() {
$("#getNewQuote").on("click", function(){
//on click, change background color
$("body").css("background-color", "red");
});
});If you want to use jquery you have to add it, click on javascript panel top right and add it
@periman2 just add an S at the beginning of the codepen url
@Benalron hmm I just did that and now it doesn't display the same error but it still doesn't work. probably some problem in my code
@Benalron thank you I'll try again now !
periman2 sends brownie points to @benalron :sparkles: :thumbsup: :sparkles:
:cookie: 368 | @benalron |http://www.freecodecamp.com/benalron
@periman2 openweather works in http, not https, so you need some other service that let you load http content to your https site
help falsy bouncer
:point_right: algorithm falsy bouncer [wiki]
Algorithm Falsy Bouncer
:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
:checkered_flag: Problem Explanation:
Remove all falsy values from an array.
Relevant Links
:pencil: read more about algorithm falsy bouncer on the FCC Wiki
@Chrono79 then I'll use a json api I found that works on chrome
@periman2 go for it
@Chrono79 although openweather website is in https...
@periman2 the api works in http (last time I checked)
@Chrono79 hm okay thank you
periman2 sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
:star2: 1543 | @chrono79 |http://www.freecodecamp.com/chrono79
ok...this is what I have so far...am I on right track...no clue were to go from here...??
any study tips...
@jesushilariohernandez you need to return only the element that was removed
@jesushilariohernandez and you should push the item not "1"
@jesushilariohernandez here:
return arr.shift(),arr.push(1); needs to be changed. in particular, the comma is an issue... what should we do? also, what needs to be pushed?
@ndburrus @jesushilariohernandez it doesn't have to be a one liner ...
remove comma put semicolen
@ndburrus remove comma use semi
@jesushilariohernandez ok, so let's see what the code looks like now..
@jesushilariohernandez why do you put everything on return?
@periman2 not sure! I'm stuck....
do the push above the return and then return the item that was removed
one thing you need to return not two
@periman2 ah... i see
@periman2 what do you mean by "it doesn't have to be a one liner?
@jesushilariohernandez push the item....
inside the push put the item that's what you need to go in the list
other than that you're fine
@periman2 so weird!!! ...
@periman2 @ndburrus Thanks for your help!
jesushilariohernandez sends brownie points to @periman2 and @ndburrus :sparkles: :thumbsup: :sparkles:
:cookie: 269 | @periman2 |http://www.freecodecamp.com/periman2
:cookie: 980 | @ndburrus |http://www.freecodecamp.com/ndburrus
no problem
@periman2 thanks again!
jesushilariohernandez sends brownie points to @periman2 :sparkles: :thumbsup: :sparkles:
:warning: jesushilariohernandez already gave periman2 points
@jesushilariohernandez I hope you understood why it worked this way
Yes sir I do know...I had to re-read this paragraph!!! several times...now that I've read it again after solving...It makes sense....
@periman2 confusing...
does anyone know if there is something in my browser that could prevent twitch from loading streams and preventing a successful API call? Trying to load up the FCC stream that appears to be live but cannot see it - spinning wheel of death instead
@jesushilariohernandez yes it's important to understand exactly the problem you want to solve
@no-stack-dub-sack what does the console say ?
@periman2 totally agree...since I've started...I has my text editor open and I work this problems on my own to se how they turn out...
@periman2 it just returns an empty object... maybe I have the call wrong, but what's troubling is that I haven't been able to load a single twitch stream for over an hour
Hello everyone.In the Caesar cipher challenge.I get the following output:THE-QUICK-BROWN-DOG-JUMPED-OVER-THE-LAZY-FOX; How do I tackle the problem of space and full stop.
@periman2 well I figured out the api call, but I still can't view any twitch streams
@RajdeepRoy how do you use join ?
Can someone help me with "escape sequences in strings" I dont understand it at all
@no-stack-dub-sack are you sure the api functions currently ? Can you open it with your browser ?
@periman2 .I created a var a=' ' and then I just added the converted strings there.So how do we use join in this case?
@periman2 well, I'm getting the json data in my log
@emelinpg what've you got so far?
@no-stack-dub-sack hmm that's weird maybe as in helpfrontend for that matter
@RajdeepRoy can you show your code or pm it to me?
but for some reason when I paste the call url into my browser I don't see the data...
yeah.. I could try. I always just come here for anything, seems to be the most active room overall
@periman2 function rot13(str) { // LBH QVQ VG!
var o='';
for (i=0;i<str.length;i++){
if (str.charCodeAt(i)>77){
o+= String.fromCharCode(str.charCodeAt(i)-13);
}
else {
o+= String.fromCharCode(str.charCodeAt(i)+13);
}
}
return o;
}
// Change the inputs below to test
rot13("GUR DHVPX OEBJA QBT WHZCRQ BIRE GUR YNML SBK.");
@Chrono79 Hey Man for real I am triping out on this code been rewriting over & over for a day & a half this is what I have after the last reset I am oh so tired of rewriting this if/else please help
YO!
var count = 0;
function cc(card) {
// Only change code below this line
switch (card) {
case 2:
case 3:
case 4:
case 5:
case 6:
count++;
break;
case 10:
case 'J':
case 'Q':
case 'K':
case 'A':
count--;
break;
}
if (count<0) {
return "Hold";
} else if (count>0) {
return "Bet";
}
@periman2 oddly, I can view twitch streams in firefox but not chrome
@ChadDean82 You're not including the count with your return.
@RajdeepRoy spaces have charcode 32 I think
@RajdeepRoy so when it finds a space it goes 32+13 that's why you se a - instead of a space
@revisualize like this?
Thanks @periman2 .So should I have a code to filter codes greater than 65
rajdeeproy sends brownie points to @periman2 :sparkles: :thumbsup: :sparkles:
:cookie: 270 | @periman2 |http://www.freecodecamp.com/periman2
if (count<0) {
return count + "Hold";
} else if (count>0) {
return count + "Bet";
}
@RajdeepRoy and you're going to have problem with the dot "." too I think it's bigger than 90 or something
Thanks again @periman2 .U r of great help.
rajdeeproy sends brownie points to @periman2 :sparkles: :thumbsup: :sparkles:
:warning: rajdeeproy already gave periman2 points
need hekp with Escape sequences
help
CamperBot
Hi, I'm CamperBot! I can help you in this chatroom :smile:
Basic Commands:
find TOPICfind all entries about topic. e.g.find jswiki TOPICshow contents of topic pagethanks @usernamesend brownie points to another userabout @usernameshows info on that userAlgorithm BONFIRENAMEinfo on a Algorithm
meet CamperBot in 
@RajdeepRoy just make sure that your if statements includes only the alphabet and in the "else" statement you include you include everything else (dots and spaces) and you just push them into your string without manipulating them
@RajdeepRoy no problem
ok @periman2
Can anybody help with Escape sequences?
@Vishal0024 what do you need?
i need to print this --> FirstLine
\SecondLine\
ThirdLine
\SecondLine\
ThirdLine
With the help of escape sequences
i did this---> 'FirstLine\n \ScondLine\ \rThirdLine'
what am i missing?
you're extremely close
\SecondLine\ has \ left and right
you haven't included them
FirstLine\n \ScondLine\ \rThirdLine
FirstLine\n \ScondLine\ \rThirdLine
i included it
help seek and destroy
:point_right: algorithm seek and destroy [wiki]
Algorithm Seek and Destroy
:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
:checkered_flag: Problem Explanation:
This problem is a bit tricky because you have to familiarize yourself with Arguments, as you will have to work with two or more but on the script you only see two. Many people hardcode this program for three arguments. You will remove any number from the first argument that is the same as any other other arguments.
Relevant Links
:pencil: read more about algorithm seek and destroy on the FCC Wiki
no in order to display a backslash you need to have two one after the other
FirstLine\n\SecondLine\\
\ this is how you display a backslash
here..when i am typing my message..it automatically removes that one \
\rThirdLine
\ *
oh it takes it down
_\
I can't write it
@ChadDean82 Any luck on the card counting code?
yes
"FirstLine\n\\SecondLine\\\rThirdLine"
it's this way
double \ left and right
yes..this is what i did..but it doesnt work
@Bitcross no Sir still tinkering to try to crack the code
@Vishal0024 this works for me how can it now work for you ?
check them again element by element
@emelinpg this is your question too
i did exactly what you mentioned
```
switch (card) {
case 2:
case 3:
case 4:
case 5:
case 6:
count++;
break;
case 10:
case 'J':
case 'Q':
case 'K':
case 'A':
count--;
break;
}
if (count<=0) {
return count + " Hold";
}else {
return count + " Bet";
}
``` @ChadDean82
this is what i am getting as an error message
should have encoded text with the proper escape sequences and no spacing.
paste your code here inside the ```
'var myStr="FirstLine\n\ScondLine\\rThirdLine";'
sorry about that \
var myStr = "FirstLine\n\SecondLine\\rThirdLine"
yes it doens't show indeed
oooh
ScondLine...
should be SecondLine
o yes
what a silly mistake
done an infinity of those myself xD
thank you so much..@periman2
np :)
:-)
@Bitcross word for word & still getting back console rturn of 0Hold. any idea's?
var count = 0;
function cc(card) {
// Only change code below this line
switch (card) {
case 2:
case 3:
case 4:
case 5:
case 6:
count++;
break;
case 10:
case 'J':
case 'Q':
case 'K':
case 'A':
count--;
break;
}
if (count<=0) {
return count +"Hold";
} else {
return count +"Bet";
}
return count;
@ChadDean82 you need a space in front of Hold and Bet. like this: " Hold" " Bet"
and you don't need that return at the end with just count.
@Bitcross someone told Me that earlier but I could not for the life of Me figure out what they meant. should there be another else if for the return count + "Bet then a else for count+ "Bet" "Hold"; ?
@ChadDean82 Nope, all you need is the if statement you have set up, just with the spaces before the words at the beginning of the string.
@willcodes if i get you right this should work http://codepen.io/dagman/full/qNpJgN/
i believe you can prettify it a bit.
it took to me some time to figure this out to be honest :smile:
i believe you can prettify it a bit.
it took to me some time to figure this out to be honest :smile:
I must not being understanding. But I am very passant if You are willing to be passant with Me. I have this now & still getting 0Hold;
if (count<=0) {
return count + "Hold";
} else {
return count + "Bet";
}if (count<=0) {
return count + " Hold";
} else {
return count + " Bet";
}
@Bitcross was that Your post or just a dup of mine?
that's mine. you're only missing a space after the opening " on both strings. so it prints the count, then a space before the word Hold and Bet.
i was told my output needs to be a single object not a bunch of strings can anyone help
var superCounter = function (x) {
var charCount = x.length;
var wordCount = x.split(" ").length;
var whiteSpace = wordCount - 1;
var letterCount = charCount - whiteSpace;
var wordArray = x.split(" ");
var avgLen = charCount / wordCount;
console.log(("Letters: " + letterCount), "Character count: " + charCount, "Word count: " + wordCount, "Whitespace count: " + whiteSpace, "Word length average: " + avgLen);};
superCounter("word counter");
@Bitcross K so probably a dumb ? but what would be My opening of the string?
need to turn console log into one object
@ChadDean82 right after the first " before Hold, you need a space. so instead of "Hold" it is " Hold". same goes for the else. "Bet" should be " Bet". they both need a space after the first double quote so that the count gets a space after it and it's separated from the strings.
Hello Campers, I am trying to dynamically insert some values from json data to html but for some reason, it isn't happening. Can anybody point out the problem so that I can rectify it?
here is the code : http://codepen.io/pragyesh31/pen/akEjpB
@Bitcross Thank You
chaddean82 sends brownie points to @bitcross :sparkles: :thumbsup: :sparkles:
:cookie: 208 | @bitcross |http://www.freecodecamp.com/bitcross
@ChadDean82 You're welcome!
@Bitcross always got to be something so simple. Just fyi I had to get My Wife to come look at everything to get a new set of eye's on it. That was the break thru. lol
@ChadDean82 It always helps to have someone who didn't write the code to look at it. I've had people point out spelling errors and missing semi-colon's before lol
Anybody active right now?
Would like to have suggestions on the above codepen
// Setup
function phoneticLookup(val) {
var result = undefined;
// Only change code below this line
"alpha": "Adams",
"bravo": "Boston",
"charlie": "Chicago",
"delta": "Denver",
"echo": "Easy",
"foxtrot": "Frank",
}
// Only change code above this line
return result;
}
// Change this value to test
phoneticLookup("charlie");
Using Objects for Lookups
I dont know what is wrong with my code
// Only change code below this line
var lookup = {
"alpha":"Adams",
"bravo":"Boston",
"charlie":"Chicago",
"delta":"Denver",
"echo":"Easy",
"foxtrot":"Frank"
};
result = lookup[val];@Bitcross when i run it, it says return not in function
// Setup
function phoneticLookup(val) {
var result = undefined;
// Only change code below this line
var lookup = {
"alpha":"Adams",
"bravo":"Boston",
"charlie":"Chicago",
"delta":"Denver",
"echo":"Easy",
"foxtrot":"Frank"
};
result = lookup[val];
}
// Only change code above this line
return result;
}
// Change this value to test
phoneticLookup("charlie");
// Setup
function phoneticLookup(val) {
var result = "";
// Only change code below this line
var lookup = {
"alpha":"Adams",
"bravo":"Boston",
"charlie":"Chicago",
"delta":"Denver",
"echo":"Easy",
"foxtrot":"Frank"
};
result = lookup[val];
// Only change code above this line
return result;
}
// Change this value to test
phoneticLookup("charlie");
that's the code that solved it for me
guyz please help me withthe 189th challenge
which one is that??
its local scope and functions
what's your code look like?
@Bitcross thanks i appreciate it. Oh and one more question how do people screenshot there code onto this chat
martinronquillo sends brownie points to @bitcross :sparkles: :thumbsup: :sparkles:
:cookie: 213 | @bitcross |http://www.freecodecamp.com/bitcross
@martinronquillo type three ``` and then hit shift + Enter, paste your code
@Bitcross #3 or three?
function myLocalScope() {
'use strict';
console.log(myVar);
}
myLocalScope();
// Run and check the console
// myVar is not defined outside of myLocalScope
console.log(myVar);
// Now remove the console log line to pass the test
three of the lowercase tilde key, the key beside the 1
// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop!="tracks" && value!=="") {
collection[id][prop] = value;
} else if (prop=="tracks" && id.tracks===undefined) {
collection[id].tracks = [];
collection[id].tracks.push(value);
} else if (prop=="tracks" && value!=="") {
collection[id].tracks.push(value);
} else if (value==="") {
delete collection[id][prop];
}
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
can someone tell me why two of my ex. inputs wont work
After updateRecords(2468, "tracks", "Free"), tracks should have "1999" as the first element.
After updateRecords(2548, "tracks", ""), tracks should not be set
After updateRecords(2548, "tracks", ""), tracks should not be set
I don't really get how this works.
var expression = /\d+/g;
@LordYamanouchi regexone.com
@qualitymanifest Thanks !
lordyamanouchi sends brownie points to @qualitymanifest :sparkles: :thumbsup: :sparkles:
:star2: 1278 | @qualitymanifest |http://www.freecodecamp.com/qualitymanifest
Has anyone here completed the "Seek and Destroy" bonfire? It's proving to be quite a problem for me
@Vercaelus plenty of people have... it's more helpful to ask a specific question. are you having problems with the arguments object or...?
basically all im saying is dont ask to ask, just ask, and be specific
Gotcha, I'll keep that in mind, thanks for the heads up. No, the arguments object is understandable (it was a hardcore curveball though). My issue is that I cant seem to figure out how to iterate the .filter() on the first array element
@Vercaelus filter is a bit confusing at first, I think when I did it I originally just used 2 for loops
@Vercaelus do you already have all the other arguments (besides the first one, which is
arr), in a real array?
yes, I used Array.from();
@Vercaelus I would go through and read the entire .filter page at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter if you have not yet
@Benalron I actually already tried to use 2 for loops, to no avail. Most of these problems have been a non-issue, this is the only one that's caused me any grief
@Vercaelus sure, can I see your code?
Absolutely. Is there an easy way to share, or is it copy-paste?
@Vercaelus cool. so you want to run a filter on
arr (arr.filter....) and return true if the additional arguments are not in arr, false otherwise. returning false removes the element
copy-paste is good, better if you format it
Got it
help format
:point_right: code formatting [wiki]
Multi line Code
```js ⇦ Type 3 backticks and then press [shift + enter ⏎] (type js or html or css)
<paste your code here>,
then press [shift + enter ⏎]``` ⇦ Type 3 backticks, then press [enter ⏎]
Single line Code
This an inline `<paste code here>` code formatting with a single backtick() at _start_ and _end_ around thecode`.
See also: ☛ How to type Backticks | ☯ Compose Mode | ❄ Gitter Formatting Basics
function destroyer(arr) {
// Remove all the values
//var iterations = arr[0].length;
var newArr = Array.from(arr);
var finalArr = newArr[0].splice();
function filter(a, b){
return a !== b;
}
for(var i = 1;i<newArr.length;i++){
//finalArr = finalArr.filter(fil(val, newArr[i]));
finalArr.forEach
/*
for(var x = newArr[0].length-1;x >= 0;x--){
if(newArr[x] === newArr[i]){
newArr.splice(x,1);
console.log(newArr);
}
*/
}
/*
for(var x = 0;x<iterations;x++){
if(newArr[x] === arr[i]){
newArr.splice(x,1);
}
}
*/
}
return newArr[0];
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
there we go
I mutilated the code trying different solutions, by the way
@Vercaelus something to be aware of is that .filter runs a loop on the array it's called upon (in this case, arr) so no additional loops are needed.
the thing is there, youre not targeting the actual array in the arguments I believe
I could be wrong, I have not used array.from();
im doing the intermediate algorithm scripting challenge "Everything Be True". However Im not understanding the question. I thought it was asking to check if the key exists in each object but some cases have keys yet its suppose to return false. any help?
@Vercaelus here's an example. this filter function doesn't do anything, it just shows you that the parameter
el represents each part of arr https://repl.it/Cc9i
@qualitymanifest yes, I thought that was the case :) However, I need to iterate over the initial array multiple times, in relation to how many numbers need "destroying"
@Benalron Array.from(); creates a real array from an argument object, so that it indexes all of its values like a normal array
ah OK, that makes sense
when I did it I just used arguments[0] to get the initial array, and then did a for loop with arguments.length to use the remaining individual numbers
with the for loop starting at 1 instead of 0, but if array from works like that... seems like its fine
@Vercaelus
arr already is a proper array. arguments will give you an array-like object of all the arguments passed into your function. you're running Array.from() on the wrong thing
@fauzankadri it's asking you to check the "truthy-ness" of the value. so not just checking for "false", but also values like NaN, undefined, 0, etc...
what i mean by "array-like" is that it looks like an array but you can't do much with it. so you want to convert
arguments to a real array. hence the Array.from
@Vercaelus yeah... if you delete everything and just return arr... the only thing it returns is the array that is within the arguments
@Vercaelus as that is the one variable being taken in... I think you need to use "arguments" in order to target the remaining items being sent in
Let me try out y'alls suggestions, and see what I come up with
@jarenescueta731 thank you :)
fauzankadri sends brownie points to @jarenescueta731 :sparkles: :thumbsup: :sparkles:
:cookie: 322 | @jarenescueta731 |http://www.freecodecamp.com/jarenescueta731
@Benalron @qualitymanifest This is what I have now, which is 40% correct;
function destroyer(arr) {
// Remove all the values
//var iterations = arr[0].length;
var newArr = arr.slice();
var destroyArr = Array.from(arguments);
for(var i = 0;i<destroyArr.length;i++){
newArr = newArr.filter(function(val){
return val !== newArr[i];
});
}
return newArr;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
Woops, I fordot to change the comparison array to "destroyArr". After doing so, I completed the bonfire!
@Benalron thanks!
vercaelus sends brownie points to @benalron :sparkles: :thumbsup: :sparkles:
:cookie: 369 | @benalron |http://www.freecodecamp.com/benalron
@Vercaelus NP, congratulations
@qualitymanifest thanks!
vercaelus sends brownie points to @qualitymanifest :sparkles: :thumbsup: :sparkles:
:star2: 1279 | @qualitymanifest |http://www.freecodecamp.com/qualitymanifest
@Vercaelus ill show you mine for the sake of seeing arguments usage
it's not at all how I would do it now, but it works
I would enjoy seeing the comparison
function destroyer(arr) {
for (x=0; x<arguments[0].length; x++){
for (y=1; y<arguments.length; y++){
if (arguments[0][x] === arguments[y]){
delete arguments[0][x];
}
}
}
arr = arr.filter(Boolean);
return arr;
}
destroyer([3, 5, 1, 2, 2], 2, 3, 5);
it was sloppy looking back at it
I just went through and deleted the item, which left a null in place which I filtered out later
To be honest, I cant even read it lol. But if it works, it works
but you can see how I used arguments[x] in the loop to check each individual argument
Ah, right
you can target them like elements in an array, so arguments [0] is the first argument, arguments1 is the second, etc
Do y'all know why it estimates a 50 hour completion time on the bonfires? I'm 2 away from being finished, and its taken me about 3 hours...
@Vercaelus For a beginner it might take 50 hours or more.
it varies a LOT for people, I think 50 hours is a very conservative estimate to people do not feel like they are going too slow or rush through them
kind of lets people relax and take their time learning stuff instead of powering through them
How is my site looking - www.blahbah.hol.es
Ah, gotcha. I forget that some people actually have lives lol.
@Benalron Your code has a problem if there are zeroes on arr.
@Masd925 would it?
@Masd925 oh right, because 0 is false with boolean, good point
Whats wrong here
why so inactive?
turning multiple variables into a return object help
@AyushKenhi These hours are usually slow.
Need some expert review on the code for "Seek and Destroy" below. I've presented
Option1 and Option2. Option1 eliminates the warning "Don't make function within loop" in Option2. Are there any other more elegant solutions? function destroyer(arr) {
// Remove all the values
//alert (arguments[1]);
var args = Array.prototype.slice.call(arguments);
args.splice(0,1);
var isNotInList = function (list, val) {
return list.indexOf(val) == -1;
};
var result =[];
/* OPTION 1 */
result = arr.filter (function (elem) {
return isNotInList (args, elem);
});
/* OPTION 2 */
for (var x = 0; x < args.length; x++) {
result = arr.filter (function (elem) { return elem != args[x]; });
arr = result;
}
return result;
}
This message was deleted
@kgashok You can tidy it up like this:
function destroyer(arr) {
args = Array.prototype.slice.call(arguments,1);
return arr.filter(function(val) {
return args.indexOf(val)===-1;
});
}
Thanks much @Masd925
kgashok sends brownie points to @masd925 :sparkles: :thumbsup: :sparkles:
:star2: 2128 | @masd925 |http://www.freecodecamp.com/masd925
Your second solution is not that good because it filters arr many times.
@Masd925 if for some reason I needed to keep the
for loop, how do I "move" the function out of the loop?
@kgashok You can loop the arguments inside the filter callback.
@Masd925 I've tried that, but I don't seem to get it. Please provide the actual code...
Good morning
can someone help me out with this
@kgashok
Instructions
Assign the following three lines of text into the single variable myStr using escape sequences.
FirstLine
\SecondLine\
ThirdLine
You will need to use escape sequences to insert special characters correctly. You will also need to follow the spacing as it looks above, with no spaces between escape sequences or words.
Here is the text with the escape sequences written out.
FirstLinenewlinebackslashSecondLinebackslashcarriage-returnThirdLine
Something like this would work:
function destroyer(arr) {
return arr.filter(function(elem){
for (var i=1;i<this.length;i++) {
if (this[i]===elem) return false;
}
return true;
},arguments);
}
this is my solution to the : var myStr= "\t \t \r \n \";
Another way is to store arguments into a variable and use it inside the callback (filter callback has its own arguments object).
@Masd925 So, basically move the loop inside the function! Nice!
@Masd925 Please provide that code option as well (storing arguments into a variable).
```
function destroyer(arr) {
var args = arguments;
return arr.filter(function(elem){
for (var i=1;i<args.length;i++) {
if (args[i]===elem) return false;
}
return true;
});
}
well if we're just giving away solutions
may I offer my more ES6y version
@llamatarianism for the record, I did come up with "inelegant" solutions already. Yes, please the
ES6y version!
function destroyer(arr, ...args) {
return arr.filter(elem => !args.includes(elem))
}
looks like it does
@llamatarianism that's the shortest solution for this I've seen if it does work
oh, I can golf it harder
just by messing up the names
d=(a,...r)=>a.filter(e=>!r.includes(e))function destroyer(arr) {
var args = Array.prototype.slice.call(arguments);
return arr.filter(elem => args.indexOf(elem) === -1);
}
took me forever to understand this challenge
@no-stack-dub-sack It can also be done without the array:
it's a shame there's no built-in inverse of filter
function destroyer(arr) {
return arr.filter(function(val) {
return Array.prototype.indexOf.call(this,val,1)===-1;
},arguments);
}
like
reject
that'd save me a byte
@llamatarianism It works! But I get the warning "use esversion:6" - where do I specify that?
@Masd925 so many solutions!
@kgashok if it works, don't worry about the warning. as long as it lets you pass
@no-stack-dub-sack just curious...
@kgashok in a comment
@no-stack-dub-sack it is the "warnings" that got me to ask on this gitter room...
// jshint esversion:6
don't worry, it's not a proper error
it's just the linter saying hey, you need to tell me if you're gonna use ES6 stuff.
because what if someone was using ES6 features by accident when they were developing for something that only has support for ES5?
the linter would have to tell them
@kgashok ES6 is essentially just the latest standard of javacript that hasn't quite been adopted ubiquitously yet if I understand correctly
has some new features that aren't yet supported by everything
Thanks much @no-stack-dub-sack @llamatarianism @Masd925
JS and its options are truly MIND BOGGLING!
JS and its options are truly MIND BOGGLING!
kgashok sends brownie points to @no-stack-dub-sack and @llamatarianism and @masd925 :sparkles: :thumbsup: :sparkles:
:cookie: 996 | @llamatarianism |http://www.freecodecamp.com/llamatarianism
:cookie: 289 | @no-stack-dub-sack |http://www.freecodecamp.com/no-stack-dub-sack
:warning: kgashok already gave masd925 points
@llamatarianism There's a lot of merit to your suggestion for a
reject function.
shrug. there's more important stuff they need to implement.
notably, there's no
flatMap or xWhile functions (e.g. takeWhile, reduceWhile)
:smile:
console.log(("Letters: " + letterCount), "Character count: " + charCount, "Word count: " + wordCount, "Whitespace count: " + whiteSpace, "Word length average: " + avgLen);
};
and none of the reducers are implemented on generators
which means you can't map or filter an unending sequence
has anyone in here right now built the twitch app? I'm having a little snafu that I could use a tip on...
@no-stack-dub-sack yes
@llamatarianism I'm having trouble iterating over the JSON data to get the information I need converted to html. I'm not having trouble accessing the info, but writing a forEach loop that won't cause the html to be written over by the previous piece of data
@no-stack-dub-sack show me what you got
@Masd925 can you tell me how this code of yours work? The call function? :(
function destroyer(arr) {
return arr.filter(function(val) {
return Array.prototype.indexOf.call(this,val,1)===-1;
},arguments);
@faisal1337 the array functions are pretty generic
they work on things that aren't arrays, but are similar to arrays
so you can do stuff like
Array.prototype.indexOf.call(arguments)
@llamatarianism it's in early stages and sort of a mess right now, I deleted the forEach because it wasn't working but see line 11, that's where I was trying to put it.
http://codepen.io/no_stack_dub_sack/pen/XKVxLJ?editors=0010
http://codepen.io/no_stack_dub_sack/pen/XKVxLJ?editors=0010
^
arguments isn't an array, but it's similar enough to one that you can use an array method on it
and in order to use an array method on it
you need to use
.call
because that's just how you use methods of data structures on different data structures.
Ahan
@no-stack-dub-sack why would you use a
forEach?
none of the data returned is an array
@llamatarianism to get the data for each of the users?
that's what your for loop is doing
if you uncomment the
console.log(data) bit
it's logging fine within the loop, but if I run that as is, the data gets written over by the next iteration
you'll see that it is getting data for each of the users
@llamatarianism and what does 'this' 'val' and 1 are doing right here?
@llamatarianism right, but now printing it into the document is what I'm having trouble with
Actually I was working on my solution and I am using nested for loops but still I can't get it to work. Thought that it would be better to understand this .
@no-stack-dub-sack what's the issue? just use something like
.append
@faisal1337 frankly I have no idea what the
1 is doing
I know the data is there though... I did this in a weird roundabout way with the wiki viewer, but that only worked because i knew the array has 10 indexes.
this is equal to arguments inside that filter function
cuz it got passed as the
thisArg to filter -> documentation
I had 10 divs all set up to push into, but this one is unknown. ok, I will try that
and
val is an item in the array
what does it mean to say a variable should have encoded text with the proper escape sequences and no spacing.
@no-stack-dub-sack what would be helpful is
if you actually showed me what you did that broke it
cuz I don't actually know what the problem is
@llamatarianism well nothing broke the fetching of the data, that's always been working fine. Hang tight, let me try this append thing. Nothing was breaking, i just couldn't get the forEach to work but apparently that's not what I need anyway
@no-stack-dub-sack a
forEach of what?
@llamatarianism never mind, I didn't know about append and that totally solved my problem. and now I feel silly, I should have asked for help earlier. I just spent an hour trying to work something out that didn't need working out. Thanks!
no-stack-dub-sack sends brownie points to @llamatarianism :sparkles: :thumbsup: :sparkles:
:cookie: 998 | @llamatarianism |http://www.freecodecamp.com/llamatarianism
@llamatarianism I'm totally new to programming if you couldn't tell, every day learning a hundred new things
.append would probably have solved a bunch of problems in my last project too. Although it came out alright. You can see here though the silly way I got around it with the 10 already programmed in divs with unique ID's.
http://codepen.io/no_stack_dub_sack/full/akLkZP/
http://codepen.io/no_stack_dub_sack/full/akLkZP/
sweet baby jesus
welp
you can always go back and rewrite stuff
and inevitably cringe at your old code
@llamatarianism haha ok, I'll check it out. Yeah, I'll def go back and re-write this eventually, it's funny because on the surface I'm very happy with it, but as I go further along and look back at old code, I realize how many improvements can be made - but that won't change the appearance at all! What's underneath the hood is what really counts.
I like the look of the codepen one better, but yeah, doesn't seem to work
yeah I noticed I forgot to add the colours
just a second
how long have you been programming for? before FCC just with other languages I'm guessing?
@no-stack-dub-sack colours
not much
a few months
I just have absolutely nothing going on
Who can spot the prop with this /////
var checkObj = function(checkProp) {
// Your Code Here
checkProp = myObj;
var checkObj = myObj[checkProp];
return "Change Me!";
}; it is checking obj prop challenge.
var checkObj = function(checkProp) {
// Your Code Here
checkProp = myObj;
var checkObj = myObj[checkProp];
return "Change Me!";
}; it is checking obj prop challenge.
I did all of the non-horrible language courses on codecademy before going to freecodecamp
so, not php or java
This message was deleted
This message was deleted
This message was deleted
actually nevermind every single line of that is kind of a problem.
1 sec
@llamatarianism gotcha, yeah, I have a full time job so trying to fit this in at least 4 hour a day but doesn't always work out.
You seem to be well on your way though
def looks nicer with the colors!
checkProp = myObj; // now you're going to be trying to find the property of `myObj` that is equal to itself, which is impossible.
var checkObj = myObj[checkProp] // this would work if you hadn't changed `checkProp`
return "Change Me!"; // you're supposed to change this. change it so it returns `myObj[checkProp]`.
im 3 months in about, zero prior experience
I'm probably about the same, but in terms of hours, I've probably had more experience
yup, and thats what counts. How far along in the fcc curriculum are you? do you intend to see it all the way through?
I've done the front end stuff and some of the back end stuff
though I half assed a lot of the front end projects
including full-assing them, then going back and finding neat ways to half-ass them
I don't really feel like finishing it though
I'd rather just make my own stuff when I feel like it
Hi
Anyone for help on this
var myStr; // Change this line
myStr = 'Firstline\n \SecondLine\ \rThirdline';
myStr = 'Firstline\n \SecondLine\ \rThirdline';
I cant seem to address what I am doing wrong
@llamatarianism fair enough... is the plan a coding job eventually or not really?
@no-stack-dub-sack probably
but I'm 15 so that's a while away
@DKSukhani
var myStr = 'Firstline\n \\SecondLine\ \rThirdline';
// ^ you didn't escape this one
also
you're not supposed to have spaces between them
also
@llamatarianism cool, well good luck, I'm sure I'll see you around here - unless of course it day where you are and not 4 in the morning
it should be
FirstLine and ThirdLine
@no-stack-dub-sack 8:32 am over here
ha! that explains why your handle doesnt seem familiar!
its 4am on friday night and I'm coding... .sheeesh. Anyway, thanks again for the help.
seeya
@llamatarianism Seems did not work
@DKSukhani if you followed all my advice it should work
myStr= "FirstLine\n\SecondLine\rThirdLine"
like this?
"FirstLine\n\SecondLine\rThirdLine"
double slash is disappearing
for some reason
`put your code between backticks when you post it in here`
then the backslashes will show up
'"FirstLine\n\SecondLine\rThirdLine"'
`\\` ->
\\
no, backticks, not quotes
` != '
\ "FirstLine\n\SecondLine\rThirdLine" \
they're to the left of the 1 key
above tab
can anyone tell me what is wrong with this
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop!="tracks" && value!==""){
collection[id][prop]=value;
}
else if (prop ==="tracks" && id.tracks===undefined){
collection[id].tracks=[];
collection[id].tracks.push(value);
}
else if (prop==="tracks" && id.tracks!=="" && value!==""){
collection[id].tracks.push(value);
}
else if (value===""){
delete collection[id][prop];
}
return collection;
}
// Alter values below to test your code
updateRecords(2548, "tracks", "Free");
ya one seco
"FirstLine\n\SecondLine\\rThirdLine"
you still haven't escaped everything properly
That doesn't solve the prob @llamatarianism
you've got a newline,
\S (which is invalid), a backslash, then an r
ok one sec - let me try
@JackEdwardLyons
hey guys, i have a question -- how do you split an array into arrays?
like this
hey guys, i have a question -- how do you split an array into arrays?
like this
['a', 'b', 'c'] convert to
[['a'],['b'],[c']]"FirstLine\n\\SecondLine\rThirdLine"
you've escaped the first backslash correctly
but there needs to be a backslash before the carriage return (
\r)
@JackEdwardLyons
const arr = [1, 2, 3];
arr.map(x => [x])
// -> [[1], [2], [3]]
though I'm not sure why you'd want to do that
ah cool
thanks @llamatarianism :)
jackedwardlyons sends brownie points to @llamatarianism :sparkles: :thumbsup: :sparkles:
:star2: 999 | @llamatarianism |http://www.freecodecamp.com/llamatarianism
can anyone help me
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop!="tracks" && value!==""){
collection[id][prop]=value;
}
else if (prop ==="tracks" && id.tracks===undefined){
collection[id].tracks=[];
collection[id].tracks.push(value);
}
else if (prop==="tracks" && id.tracks!=="" && value!==""){
collection[id].tracks.push(value);
}
else if (value===""){
delete collection[id][prop];
}
return collection;
}
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop!="tracks" && value!==""){
collection[id][prop]=value;
}
else if (prop ==="tracks" && id.tracks===undefined){
collection[id].tracks=[];
collection[id].tracks.push(value);
}
else if (prop==="tracks" && id.tracks!=="" && value!==""){
collection[id].tracks.push(value);
}
else if (value===""){
delete collection[id][prop];
}
return collection;
}
whats wrong with this
Got it @llamatarianism
Thanks for that hint that I was not escaping
@Cal-culator
id.tracks is undefined
id is just a number
it has no
"tracks" property
I think you want
collection[id].tracks
ah ok
@DKSukhani can you explain it to me
this was my solution
myStr="\n\\r\"
whenever you use blockquote tag.. is there anyway to change the color of the marking on the left hand side of text.. see my codepen to see what i mean
http://codepen.io/duel_drawer8/pen/WxdGzj/
http://codepen.io/duel_drawer8/pen/WxdGzj/
for a json object
{
"key": "value"
}and
{
key: "value"
}produces same result
how do I use a variable's content as key then?
@meetmangukiya you parse it back into a js object, JSON.parse()
@hnry sorry I didn't get it
can you write the code and send?
anyone?
do you mean
var a = JSON.parse({key: "value"});
@meetmangukiya is it actually json? because your example doesn't show that it is
@hnry it looks like the example one, and I think it is json
@meetmangukiya ok thats not json, that's just a regular object
@meetmangukiya
var a = {
"key": "value"
}
console.log(a.key) // => "value"
@meetmangukiya makes no difference if it's "key" or key
yeah, thats the problem
The
key is a variable
@meetmangukiya i don't get what you are asking
what is the actual problem? can you show a real example that shows the problem you are talking about?
{ key: "value" } and { "key": "value" } are 100% identical
the 1st one is just syntactic sugar for the 2nd one
it is not a variable
its like
var a = "foo";
var b = "bar";
var c = {a: b};
console.log(c) // => {a: bar} , I expect {foo: bar}
there's a way to do that
the ES5 version:
var c = {};
c[a] = b;
the ES6 version:
var c = { [a]: b };
@Dueldrawer8 you can use css to change blockquote{border-left: 5px solid color;}
the
[] makes it evaluate the variable
instead of treating it as a string
I tried
() but not [], I thought () is used in evaluation
shrug.
javascript has a complicated syntax.
you want something that makes sense, go write lisp :P
I never tried lisp
anyways thanks @llamatarianism
meetmangukiya sends brownie points to @llamatarianism :sparkles: :thumbsup: :sparkles:
:star2: 1000 | @llamatarianism |http://www.freecodecamp.com/llamatarianism
how is the market for lisp?
everything's really simple because everything is a lisp
come on lisp is supposed to one the harder languages to master @llamatarianism
@alexanderkopke clojure is actually quite popular nowadays
@Rud156 it really isn't
gimme a few seconds
heard good things about clojure.. like that it makes you a better coder
(+ 1 2)
'(1 2)
'(1 . 2)
`(,@(list 1 2 3))
there, that's like, the entire syntax of most lisps.
can't understand a thing
first line probably adds the numbers
@Rud156 that's because a good 50% of that just consists of a DSL for macros
and 90% of lisp code just looks like the 1st line:
(+ 1 2)
that first line accounts for most of the language's syntax.
Has anyone tried their hands on building a chrome extension?
@llamatarianism go to bed that's an order sir llama :point_right:
clojure is more complex because it has a lot of data structure literals.
:keyword
["this" "is" "a" "vector"]
{:hash "map"}
#{:hash :set}
How do we store data using just
js?
@evan153 :gun:
@meetmangukiya what do you mean by store??
but yeah, lisps are the definition of simple.
just lists.
@llamatarianism I'll be sure to check it out. Any specific resources I should see??
(define (map fun lst)
(if (null? lst)
'()
(cons (fun (car lst)) (map fun (cdr lst)))))
@Rud156 you need to store user configs and all, right. In my case, am just making a simple app that is supposed to write the
title and url of the current tab somewhere
@Rud156 the little schemer is good for learning scheme. practical common lisp is good for clisp. clojure for the brave and true is good for clojure.
@meetmangukiya you can use the local storage and store data
@Rud156 I just thought about using an array, but it is temperory, as long as the browser is not closed, then its all gone
using local storage will keep the data permanantly
@Rud156 yeah, the question is how?
just search for localStorage in javascript on google
that example above was in scheme. this is common lisp:
(defun map (fun lst)
(if (null lst)
nil
(cons (funcall fun (first lst)) (map fun (rest lst)))))this is clojure:
(defn map [fun lst]
(if (empty? lst)
'()
(cons (fun (first lst)) (map fun (rest lst)))))
@llamatarianism scheme looks good
@meetmangukiya Here's the link: http://www.w3schools.com/html/html5_webstorage.asp
^ 99% of the above code is made out of data structure literals
just lists and stuff
the only thing you might not call a data structure literal is
'
@Rud156 I dont understand how is this useful? There can be so many conflicts
It's like a program with lots of programmer working on the same program, setting various global variables unknown to each other
function lookUpProfile(firstName, prop){
// Only change code below this line
var i=0;
while (i<=contacts.length){
for (var j=0;j<=contacts.length;j++){
if (prop!==contacts[i][j]){
console.log("No such property");
}
else if (prop===contacts[i][j]){
console.log(contacts[i][prop]);
}
}
if (firstName===contacts[i][firstName]){
console.log(contacts[i][firstName]);
}
else if (firstName!==contacts[i][firstName]){
console.log("No such contact");
}
i++;
}
// Only change code above this line
}
why does this say TypeError: undefined is not an object
evaluating 'contacts[i]'
@Rud156 don't you think the same?
sup guys
the variables set in the localstorage are applicable to only one application so it will not conflict even if there are same variable in different webpages. Only your webapp needs to have non conflicting variables @meetmangukiya
i have a logical error that i can't put my finger on..
@llamatarianism Could you advice me ? I want to learn functionnal programming well and start a with a new language programming, wich one is best to learn the most possible about functionnal programming?
@Rud156 ohh.. very well... Is there any method I can loop over all the items in the local storage?
@willfree108 if you just wanna learn the most possible? haskell
what is it Jerzz
haskell is like, the definitive functional language
I will try to help if i can
@Cal-culator - the problem you have is in while statement
// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if (prop!="tracks" && value!=="") {
collection[id][prop] = value;
} else if (prop=="tracks" && id.tracks===undefined) {
collection[id].tracks = [];
collection[id].tracks.push(value);
} else if (prop=="tracks" && value!=="") {
collection[id].tracks.push(value);
} else {
delete collection[id][prop];
}
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
@2cool4school oh. i did the same thing as you at first. id.tracks should be collection[id][tracks]
all the inputs work for my if/else if statements except, updateRecords(2468, "tracks", "Free")
@llamatarianism alright ty a lot, it's on my cursus too so it make more sense
willfree108 sends brownie points to @llamatarianism :sparkles: :thumbsup: :sparkles:
:star2: 1001 | @llamatarianism |http://www.freecodecamp.com/llamatarianism
ive changed this
one minute ill be back
for(var i=0; i<localStorage.length; i++) {
var key = localStorage.key(i);
var value = localStorage[key];
console.log(key + " => " + value);
}
@meetmangukiya
var key = localStorage.key(i);
var value = localStorage[key];
console.log(key + " => " + value);
}
@meetmangukiya
@dmitrij-schmidt How do i solve it?
@Cal-culator - .length starts always from 1, while indexes start from 0 ;) so in last iteration you are trying to reach non-existent item
simply i < contacts.length i think
@dmitrij-schmidt i changed that but the code still doesn't work.
alright, let me check it then :)
@Cal-culator I changed all instances to bracket and it gives the same results
@2cool4school
id.tracks===undefined should be collection[id][tracks]===undefined
id.tracks===undefined should be collection[id][tracks]===undefined
@Rud156 How did you determine that
localStorage is an array? Assuming I only know that length is a property of an array
id is just a number. You need an array for the code to know what exactly you want
typeof localStorage returns object
@meetmangukiya you can get the length of the items in localstorage. learn't it from a course by w3c on edx.org
@Cal-culator omg thank you i dont know how i didnt catch that inconsistency.. i knew there had to be one i looked at that for far too long to not catch that... thanks man.
2cool4school sends brownie points to @cal-culator :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for cal-culator
@2cool4school its like reading your own essay you dont catch the word that you left out thats supposed to be in the sentence... derp
@2cool4school
don't thank me. thank llamatarianism. He helped me with that exact same essay.
don't thank me. thank llamatarianism. He helped me with that exact same essay.
cal-culator sends brownie points to @2cool4school :sparkles: :thumbsup: :sparkles:
:cookie: 211 | @2cool4school |http://www.freecodecamp.com/2cool4school
code*
@Cal-culator haha, well it's like paying it forward lol
@Cal-culator - try to read about .hasOwnProperty()
ok @Rud156 thanks for all the help
meetmangukiya sends brownie points to @rud156 :sparkles: :thumbsup: :sparkles:
:cookie: 270 | @rud156 |http://www.freecodecamp.com/rud156
:D
@dmitrij-schmidt Ah ok. Thanks! I forgot about that. let me try taht
cal-culator sends brownie points to @dmitrij-schmidt :sparkles: :thumbsup: :sparkles:
:cookie: 323 | @dmitrij-schmidt |http://www.freecodecamp.com/dmitrij-schmidt
@Cal-culator - also try to debug your code in https://repl.it/languages/javascript_web . it's more helpful because it allows to console.log things.
try console.log(contacts[i][j]) in your first if statement ;) it will give you a hint
@dmitrij-schmidt I will try that.
im pretty stuck trying to remove leading 0's in a string containing multiple numbers... about an hour in to trying to figure it out if anyone has any thoughts?
@Benalron - more info? some case maybe?
@dmitrij-schmidt I think I might have figured it out... general rule of thumb for me is to ask a question here, and I will figure it out 30 seconds later : ]\
@Benalron then small gift from me (of course if you don't know it already) - https://regex101.com/#javascript
right down in the middle there's 'substitution' section. really helpful tool
that's useful, thanks @dmitrij-schmidt
benalron sends brownie points to @dmitrij-schmidt :sparkles: :thumbsup: :sparkles:
:cookie: 324 | @dmitrij-schmidt |http://www.freecodecamp.com/dmitrij-schmidt
its for the calculator... I noticed a "bug" in almost everyones calculator that is VERY minor, but I could not let slide
@dmitrij-schmidt Do i remove the while looping and do it some other way?
Because the loop still goes on even if the contact was found
Hi, can someone help me?
This is my code:
$(document).ready(function() {
$("#randomBtn").on("click",function(){
var answer="";
var random= Math.floor(Math.random() * (3)+1);
switch(random) {
case 1:
answer=['"La mujer es como la polvora, si no la tratas con cuidado, explota"', "Miguel Moyá"];
break;
case 2:
answer= ['"Y los españoles, muy españoles y mucho españoles!!"', "Rajoy"];
break;
case 3:
answer= ['"El mundo esta dividido en tres grandes grupos, el de los que sabe contar, y el de los que no."',"Homer J. Simpson"];}
$(".message").html(answer[0]);
$(".name").html(answer[1]);
var tweet= "https://twitter.com/intent/tweet?text=+";
answer=answer[0].split(" ");
answer=answer[0].join("%20");
tweet+= answer[0];
tweet+= "%20"+ answer[1];
console.log(answer);
$("#tweetBtn").attr("href",tweet);
});
});My problem is that $("#tweetBtn").attr("href",tweet); don't work, also I write console.log(answer); for search problems, and console don't print anything
;_(
help please
@Olbap14 you don't need to write %20 for each space. It's not necessary. Twitter will do that for you. try directly sending the text
it's more about the inside of the loop... read again the task description. inside the loop you have to:
check if firstName is an actual contact's firstName {
check the given property (prop) is a property of that contact. {
if so, return that prop
if not, return 'no such prop'
}
} if not {
return 'no such contact'
}
@Cal-culator - sorry - forgot to mention. that part above is for you ;)
its ok. :)
i tried adding counterLoop and then entered it in the website you gave me. it works fine. i don't know why it won't work on this platform
@dmitrij-schmidt
@Rud156 nice!!
Btw, how do you do that. I just copy and paste my code.
help format
:point_right: code formatting [wiki]
Multi line Code
```js ⇦ Type 3 backticks and then press [shift + enter ⏎] (type js or html or css)
<paste your code here>,
then press [shift + enter ⏎]``` ⇦ Type 3 backticks, then press [enter ⏎]
Single line Code
This an inline `<paste code here>` code formatting with a single backtick() at _start_ and _end_ around thecode`.
See also: ☛ How to type Backticks | ☯ Compose Mode | ❄ Gitter Formatting Basics
@dmitrij-schmidt where is that
@Cal-culator - in your case contacts[i] is an object, and seems like it's properties are not enumerated - that way unreachable by contacts[i][j] where j is a number
try to run in repl.it that code below and read logs
var contacts = [
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
}
];
console.log(contacts[0]);
console.log(contacts[0][0]);
console.log(contacts[1]);
console.log(contacts[1][1]);@Cal-culator as for backticks: you have to put it in chat window like
'''
code
code
code
'''
just replace apostrophes with backticks - the ` marks ;)
:bulb: to format code use backticks! ``` more info
function lookUpProfile(firstName, prop){
// Only change code below this line
var i=0;
CounterLoop:
while (i<=contacts.length-1){
if (contacts[i].hasOwnProperty(prop)===false){
console.log("No such property");
break CounterLoop;
}
else if (contacts[i].hasOwnProperty(prop)===true && contacts[i].firstName===firstName){
console.log(contacts[i][prop]);
break CounterLoop;
}
else if (firstName===contacts[i][firstName]){
console.log(contacts[i][firstName]);
break CounterLoop;
}
else if (firstName!==contacts[i][firstName]){
console.log("No such contact");
break CounterLoop;
}
i++;
}
i changed it to this
@dmitrij-schmidt
it seemed to work in repl.it but not here
@Cal-culator am i wrong to see, that it makes only one run of the loop?
@dmitrij-schmidt what do you mean?
it is supposed to loop until it finds the contact and firstName
@dmitrij-schmidt you are correct
also, there's no reason to use a loop label in this case
you can just use
break;
reminder that every time you use a
goto, dijkstra kills a puppy
hurrrrrrr
// Setup
var collection = {
"2548": {
"album": "Slippery When Wet",
"artist": "Bon Jovi",
"tracks": [
"Let It Rock",
"You Give Love a Bad Name"
]
},
"2468": {
"album": "1999",
"artist": "Prince",
"tracks": [
"1999",
"Little Red Corvette"
]
},
"1245": {
"artist": "Robert Palmer",
"tracks": [ ]
},
"5439": {
"album": "ABBA Gold"
}
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));
// Only change code below this line
function updateRecords(id, prop, value) {
if(prop === "tracks") {
if(collection[id].prop !== "tracks") {
collection[id].prop = tracks[""];
collection[id].prop.push(value);
}
if(value !== "") {
collection[id].prop.push(value);
} else {
delete collection[id].prop;
}
}
return collection;
}
// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");
What is the problem in this?
ouch
record collection
help record collection
:point_right: challenge record collection [wiki]
Challenge Record Collection
:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
:checkered_flag: Problem Explanation:
You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unique id number and has several properties. Not all albums have complete information.
Write a function which takes an id, a property (prop), and a value.
For the given id in collection:
If value is non-blank (value !== ""), then update or set the value for the prop.
If the prop is "tracks" and value is non-blank, check to see if the given element in the array has the property of "tracks". If the element has the property of "tracks", push the value onto the end of the "tracks" array. If the element does not have the property, create the property and value pair.
If value is blank, delete that prop.
Always return the entire collection object.
:pencil: read more about challenge record collection on the FCC Wiki
there you go
Thanks!
@dmitrij-schmidt The code works in repl.it
@Cal-culator read up on if else statements and breaks
@Cal-culator and see if in what condition/if you need to use break statements to finish this problem
@mafelix will do
you're breaking after every if else if else statement
now see if your logic works for what the problem is asking for
@Cal-culator and
while(i<=collection.length-1){
can be rewritten to this:
@mafelix I did it this way because of my while looping
while(i<collection.length){
don't you need to iterate over all the records?
to pass some tests?
you're saying for some of your tests
check if you find ONE thing and break
I don't recall if it's just one thing or not
but I do remember I did not do it this way
you're saying
basket = [apple,orange,baby,zucchini]
if(basket has apple)
#do something
break;
is that what you want?
or do you have to make sure all the items are apples?
@mafelix dont i have to do the former?
I don't know
you tell me
@mafelix, @Cal-culator - there are three possible return points and the logic is like this:
check if firstName is an actual contact's firstName {
check the given property (prop) is a property of that contact. {
if so, return that prop
if not, return 'no such prop'
}
} if not {
return 'no such contact'
}
is there more than one record in record collection?
@dmitrij-schmidt I will comment my current code and try that
pseudo code is precious
talk outloud to yourself
and explain your code to yourself
and the problem
don't do it in public places though
because people will think you're crazy
@mafelix :)
@dmitrij-schmidt Do I have to loop to check?
@dmitrij-schmidt Do I have to loop to check?
help record collection
:point_right: challenge record collection [wiki]
Challenge Record Collection
:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
:checkered_flag: Problem Explanation:
You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unique id number and has several properties. Not all albums have complete information.
Write a function which takes an id, a property (prop), and a value.
For the given id in collection:
If value is non-blank (value !== ""), then update or set the value for the prop.
If the prop is "tracks" and value is non-blank, check to see if the given element in the array has the property of "tracks". If the element has the property of "tracks", push the value onto the end of the "tracks" array. If the element does not have the property, create the property and value pair.
If value is blank, delete that prop.
Always return the entire collection object.
:pencil: read more about challenge record collection on the FCC Wiki
@Cal-culator you can make a test on one chosen element from array, or put it inside a loop from the beginning :)
and remember to console.log things inside those ifs, to see what they actually produce
and remember to console.log things inside those ifs, to see what they actually produce
If the prop is "tracks" and value is non-blank, check to see if the given element in the array has the property of "tracks". If the element has the property of "tracks", push the value onto the end of the "tracks" array. If the element does not have the property, create the property and value pair.var a = 'https://youtube.com';
a.split(/(\/)|(\.)/); // => ["https:", "/", undefined, "", "/", undefined, "youtube", undefined, ".", "com"]
Can someone explain, why the undefined?
if (contacts.hasOwnProperty("firstName")===firstName){
console.log(firstName);
if (contacts.hasOwnProperty(prop)===true){
console.log(prop);
}
else if (contacts.hasOwnProperty(prop)===false){
console.log("No such Property");
}
}
else if (contacts.hasOwnProperty("firstName")!==firstName){
console.log("No such contact");
}
Hi, what am I doing wrong in the function?
var myObj = {
gift: "pony",
pet: "kitten",
bed: "sleigh"
};
function checkObj(checkProp) {
if (myObj.hasOwnProperty("checkProp")) {
return myObj[checkProp_var];
}
return "Not Found";
}
checkObj("gift");
@TomCake15 i don't think its checkProp_var
try just
return myObj[checkProp];
return myObj[checkProp];
@Cal-culator
thx but still not working. It will not find the properties
thx but still not working. It will not find the properties
tomcake15 sends brownie points to @cal-culator :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for cal-culator
How about if (myObj.hasOwnProperty(checkProp)===true)
You quoted checkProp but checkProp is not a property
checkProp is a variable in which you assign the actual property
@TomCake15
@Cal-culator ahah . thank you :) :sparkles:
tomcake15 sends brownie points to @cal-culator :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for cal-culator
@Cal-culator - what type of value does .hasOwnProperty() return?
hello everyone....
function reverseString(str) {
var j=0;
for(var i=(str.length)-1 ;i>0;i--){
str[j]=str[(str.length)-1];
j++; }
return str;
}
reverseString("hello");
can anyone please help me out ..
i want to reverse a given string
@Cal-culator - so far i know it's a boolean, so...
if (contacts.hasOwnProperty("firstName") ===firstName){in case of success is evaluated as
if (true ===firstName){which is false :)
can i accept some answer??
expect*
Hello
can someone help me with the counting cards challenge pls? I can't get it to print the result with the 'if' statement after a "return"
@varun29 - you don't need any loop here. please, read those links provided in task description. you have to use .split(), .reverse() and .join() in the right order, that's all ;)
@yannniii - we can try, can you paste code here? formatted with backticks please :)
what if I don't want to use methods and do it all on my own manually ,sir @dmitrij-schmidt
I don't know how to post code here.... lol such a newbee
help format
:point_right: code formatting [wiki]
Multi line Code
```js ⇦ Type 3 backticks and then press [shift + enter ⏎] (type js or html or css)
<paste your code here>,
then press [shift + enter ⏎]``` ⇦ Type 3 backticks, then press [enter ⏎]
Single line Code
This an inline `<paste code here>` code formatting with a single backtick() at _start_ and _end_ around thecode`.
See also: ☛ How to type Backticks | ☯ Compose Mode | ❄ Gitter Formatting Basics
what is this backticks sign?? can't see it clearly on my screen
@yannniii depends on the keyboard you have. probably that mark above Tab button in upper left corner of keyboard
@varun29
function reverseString(str) {
var str1='';
for(var i=(str.length)-1 ;i>-1;i--){
str1+=str[i];
}
return str1;
}
reverseString("hello");
using a Macbook air french keyboard
hello
can someone please help me out with this
i am stuck
myStr should have encoded text with the proper escape sequences and no spacing.
var myStr = "\ \t \t \r \n\";\
@yannniii check that sign below quote mark
«««
nope :D
this is what i did
@RC31 read the instructions .I think they have also added some text.
@RC31 you have only some marks, but no words in it :)
@UtkarshShukla7 you didn't declare str1 to be an array..
why?
@dmitrij-schmidt
Instructions
Assign the following three lines of text into the single variable myStr using escape sequences.
FirstLine
\SecondLine\
ThirdLine
You will need to use escape sequences to insert special characters correctly. You will also need to follow the spacing as it looks above, with no spaces between escape sequences or words.
Here is the text with the escape sequences written out.
FirstLinenewlinebackslashSecondLinebackslashcarriage-returnThirdLine
@dmitrij-schmidt
hello
and then these are the questions
anyone know java script
myStr should have encoded text with the proper escape sequences and no spacing.
myStr should have one newline character \n
myStr should have one carriage return character \r
myStr should have two correctly escaped backslash characters \
myStr should have one newline character \n
myStr should have one carriage return character \r
myStr should have two correctly escaped backslash characters \
the last 3 has ticked green
@varun29 I am just concating the string characters.
actually i have worked on the angular js and jquery now i am going mto learn node js
but i have been at the first one for sometime now
@dmitrij-schmidt
so i would to know that what topic i should cover to learn node js
hey guys I need help for this :D
function nextInLine(arr, item) {
// Your code here
return testArr.shift(); // Change this line
}
// Test Setup
var testArr = [1,2,3,4,5];
nextInLine([5,6,7,8,9],1);
// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
@yannniii look for something that looks like an apostrophe on your keyboard, and test them
nextInLine([], 1) should return 1
nextInLine([2], 1) should return 2
nextInLine([5,6,7,8,9], 1) should return 5
After nextInLine(testArr, 10), testArr[4] should be 10
nextInLine([2], 1) should return 2
nextInLine([5,6,7,8,9], 1) should return 5
After nextInLine(testArr, 10), testArr[4] should be 10
the result I get is.....
Before: [2,3,4,5]
2
@RC31 but it also says that:
Assign the following three lines of text into the single variable myStr using escape sequences.
Assign the following three lines of text into the single variable myStr using escape sequences.
FirstLine
\SecondLine\
ThirdLine
After:[3,4,5
@leafarafael you also have to push the item in the arr
```this?
@RC31 but the ther sequences like this first one
FirstLine\nSecondLine...
@dmitrij-schmidt i tried it too
@yannniii yes! put three of them above code, and three below
@UtkarshShukla7 can we just concatenate using + sign
"FirstLine\n\SecondLine\rThirdLine"
@varun29 yes
can this be done using array also??
@RC31 almost there! just add two escaped backslashes where they are supposed to be
@dmitrij-schmidt ok
can we just take another array and store the reverse of the original one into our new array? @UtkarshShukla7
@varun29 yes store in it and then join it (but you have to use array method)
var count = 0;
function cc(card) {
// Only change code below this line
switch(card) {
case 2:
case 3:
case 4:
case 5:
case 6:
count = count + 1;
break;
case 7:
case 8:
case 9:
count = count + 0;
break;
case 10:
case 'J':
case 'Q':
case 'K':
case 'A':
count = count - 1;
}
return count;
if (count <= 0) {
return count + " " + "Hold";}
}
else {
return count + " " + "Bet";
}
//Add/remove calls to test your function.
// Note: Only the last will display
}// Note: Only the last will display
cc(2); cc('J'); cc(9); cc(2); cc(7);
what is wrong with my code? it works fine. i don;t understand why isn't accepted
var contor = 1;
var factorial =0;
function factorialize(num) {
for(var i=1;i<=num;i++)
factorial = contor*=i;
if(num === 0){
factorial = 1;
}
return factorial;
}
factorialize(5);
@yannniii - test it here, and try to fix bugs that are shown ;) https://repl.it/languages/javascript_web
@yannniii remove
return count;
@dmitrij-schmidt \FirstLine\n\SecondLine\rThirdLine\
??
@IulianChirvasa don't use global variables .
i use global because i can't declare local
@RC31 nope.
1)backslashes are escaped by \ - one for escaping, one for backslash
2) try to get output like
FirstLine
\SecondLine\
ThirdLinesee that backslashes are before and after SecondLine?
@dmitrij-schmidt ok
thx guys, it is always these little quotation marks or extra words that I implement which fxxk up the program
@IulianChirvasa but FCC performs many tests on the same function so your global variables values are passed to the next test too
@UtkarshShukla7 understand..
@yannniii get yourself some code editor with linter. or at least run it trough repl.it or something that will show you some hints ;)
function palindrome(str) {
// Good luck!
var splitToString = str.split('');
var reverseString = splitToString.reverse();
if(str === reverseString){
return true;
}
else{
return false;
}
}
palindrome("eye");
tthe problem is when the given string is indeed a palindrome
@IulianChirvasa please, format code with backticks, it's easier to read ;)
@dmitrij-schmidt how?
help format
:point_right: code formatting [wiki]
Multi line Code
```js ⇦ Type 3 backticks and then press [shift + enter ⏎] (type js or html or css)
<paste your code here>,
then press [shift + enter ⏎]``` ⇦ Type 3 backticks, then press [enter ⏎]
Single line Code
This an inline `<paste code here>` code formatting with a single backtick() at _start_ and _end_ around thecode`.
See also: ☛ How to type Backticks | ☯ Compose Mode | ❄ Gitter Formatting Basics
@IulianChirvasa you need to filter out non letter/number characters and also make the whole string lowercase before comparison
@Athaman thanks
iulianchirvasa sends brownie points to @athaman :sparkles: :thumbsup: :sparkles:
:cookie: 584 | @athaman |http://www.freecodecamp.com/athaman
no problem :)
if i just declare an array like this
var a[]; and just input values in it using a for loop. is it right ??
can i do this in java script?
you want
var a = [];
do we hav to complete basic algorithm scripting to code a pen??
anyone??
@Indhusethu no.
ok @dmitrij-schmidt
but what do you want to code? algorithms help you better understand theory. coding those projects help you practice it
oh well thanks!!! @dmitrij-schmidt
indhusethu sends brownie points to @dmitrij-schmidt :sparkles: :thumbsup: :sparkles:
:cookie: 325 | @dmitrij-schmidt |http://www.freecodecamp.com/dmitrij-schmidt
algorithms are good for you ;)
whom are yu saying @Athaman
@Athaman :+1: yust like mayonaise!
*just
i... don't know if mayonaise is actually 'good' for you. but it is pretty enjoyable so that's nice.
This message was deleted
@Athaman well, if i'm to judge from those 'swedish mealtime' videos, it's really good :D
seems like a reliable source of information.
Hello i have this code for the truncate string challenge:
'''
function truncateString(str, num) {
// Clear out that junk in your trunk
//var newstrlength;
if (str > 3 || num > 3) {
var newstrlength = num - 3;
str = str.substring(0, newstrlength || num);
str = str.concat('...');
}
else if (num < 3) {
str = str.substring(0, num);
str = str.concat('...');
}
return str;
}
truncateString("A-tisket a-tasket A green and yellow basket", 11);
'''
but it cannot work with this function call:
'''
truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)
'''
is the argument syntax correct, because im getting syntax errors when i try to use function call to debug
how do i paste code
@Promhize backticks, not apostrophes
,,, this?
located next to the 1 on a US keyboard
nope, `
okay found it thanks
welcome
three backticks right?
yup, on a line above then 3 on a line below the code chunk
truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)
why are you calling .length on the argument being passed in?