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.
@crazymaster49 11 % 3 = 1 does not do anything
javascript
@crazymaster49 u need to create a math expression and assign it to a variable...
javascript will calculate whatever result is
javascript will calculate whatever result is
ie:
total = 2+5;
ok thank you all, but how do you use finding a remainder in JavaScript? if that is not correct.
using the remainder operator
%
+ adition operator total = 2 + 5/ division operator total = 2 / 5* multiplication operator... total = 2 * 5soo.. how u would find remanding using the remainder operator ???
%
a.k.a. modulo
Can you give me an example @moigithub in code of how this is used?
@Egoscio I think there is a difference
3 % 9 === 0
is it bad that i'm using google to figure out some codes/functions so i can use them in the algorithm challenges? or is that normal to do...?
3 % 5 == 2
@Symbolistic not at all
re-read above.. the examples using differents operators.. @crazymaster49
@Symbolistic knowing how to google is the sign of a good programmer lol
Thank you all!
@hippybear cool, I was wondering cause it felt really easy after googling my problems, lol.
@crazymaster49 you can also do this in your devtools and see it in action
of course u need to use whatever variable name /values the instruction tells u to do.. @crazymaster49
wait till you hit the ?
that thing had me baffled for a bit
@hippybear Seems like you're right about remainder vs modulo https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators#Remainder_()
hit the what ? @hippybear
ternary operator
?
Remainder uses a built in modulo function, weird.
@moigithub Thanks i am still working on figuring this out.
crazymaster49 sends brownie points to @moigithub :sparkles: :thumbsup: :sparkles:
:star2: 2015 | @moigithub |http://www.freecodecamp.com/moigithub
@Egoscio right??
A strange step from python to %
AH I was right about one thing, the main difference is the signs
"the difference being that the modulo operator result would take the sign of the divisor, not the dividend."
In Swift, they implemented the actual modulo function
nubs
I gotta think JS when I'm really a swifty :P
I want to get into swift
and go
Have to do C and Java this coming semester
not too happy about that
I'm coming from 2 years of fullstack javascript experience to fullstack Swift
(Web and Node.JS => Swift iOS and Vapor server side)
Very neat transition
gangster
I love node
although there is some new issue where require wont work anymore so now you have to redo all your code
???
the import BS?
yeah
(I don't like import at all)
Does it really all go back to the dude who broke the internet in 17 lines of code?
Still not even fully implemented AFAIK, still requires transpiling via Babel and co
nah, that's something completely different
I thought not
I need help with this exercise, Logical Order in If Else Statements
Post it over, we love helping
@CageEcharte show us the code
@hippybear How did a NPM dependency affect the ES6 module syntax?
Code bra
that shits srs biz
IIRC in a couple of hours later, someone cloned the project and fixed the issue
one of the contributers
@hippybearfunction orderMyLogic(val) {
if (val < 10) {
return "Less than 10";
} else if (val < 5) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(9);
@CageEcharte seems legit one sec
order matters... @CageEcharte
(async ) code run from top to bottom... and only 1 of the if /elseif blocks gets executed
soo knowing that ....
if val is 4.. what if block gets executed ????
(async ) code run from top to bottom... and only 1 of the if /elseif blocks gets executed
soo knowing that ....
if val is 4.. what if block gets executed ????
good catch
moigithub @moigithub wonder if @CageEcharte fell asleep :sleepy: :question:
lol
this chunk array in groups is killing me lol
Im gonna get it though
@Egoscio Hey! one question going back to my problem. What does the ".apply(this, arguments)" mean? btw, your solution works! I just don't understand it lol
Back
hi
Here's the doc page
instead of doing someFunction(1, 2, 3)
you can do someFunction.apply(this, [1, 2, 3])
you can replace "this" with anything you want present as the function's this
can even be {}
In the function,
arguments is an array of arguments used to execute the function, you're just passing it on synthetically
hmm, cool. it's going to take me a while to absorb this
(note: the
arguments array isn't really an array, so it doesn't conform to the standard Array protocol)
Thats more node logic than pure js but it still applies
you will encounter it more in node
Example:
```js
```js
oops
why is that not an array?
Hello World
welcome to FreeCodeCamp @AshriSoft!
Well, arguments is a wannabe array, it's an object with numbered properties
but it doesn't have stuff like
.reduce or forEach (IIRC)
arr = [{some: 1},{some: 3},{some: 33}]
an array of objs
arrays are robust
can someone give me the idea behind "Wherefore art thou" challenge Please
I didnt get there yet so I dunno
@brianrudloff
> var realArray = []
undefined
> var fakeArray
undefined
> function setFake() { fakeArray = arguments }
undefined
> setFake()
undefined
> realArray instanceof Array
true
> fakeArray instanceof Array
false
anyone got some pointers for pairwise?
bam!
@Byzgig never heard of it
ATGC ? @Byzgig
u function get called with a string.. u need to return an array of array.. with their pair
u function get called with a string.. u need to return an array of array.. with their pair
```
@Egoscio well yeah but after you put in your args the array will be real no?
if string is "AA" u return [["A","T"],["A","T"]]
T is pair of A.. (check the instructions)
T is pair of A.. (check the instructions)
im not on that one man
then ?
how do you post code again?
@hippybear Nope
copy paste
add backticks at start and end.. on its own line
@Egoscio splain
function pairwise(arr, arg) {
var job = [];
var select = false;
var test = arr;
// console.log(test);
for(var i = 0; i < arr.length; i++){
select = false;
for(var j = 0; j < arr.length; j++){
if(arr[i] + arr[j] === arg){
job.push({one: arr.indexOf(arr[i]), two: arr.indexOf(arr[j])});
arr[i] = false;
arr[j] = false;
}
}
console.log(arr);
console.log(job);
}
//console.log(arr);
return job.reduce(function(a, b){
return a + b;
});
}
pairwise([1, 3, 2, 4], 4);
ahh that one :)
@hippybear An arguments "array" is something like:
var arguments = { 0: 'firstArg', 1: 'SecondArg' }
it's not
var arguments = ['firstArg', 'SecondArg']
function doStuff(a,arr){} doStuff(1, 44) will now have an array of ["44"]
@brianrudloff Also, here's a little example of
.apply():> function greeting(firstName, lastName) { console.log('Hello, ' + firstName + ' ' + lastName + '!') }
undefined
> greeting('John', 'Doe')
Hello, John Doe!
undefined
> greeting.apply({}, ['John', 'Doe'])
Hello, John Doe!
undefined
>
That array resembles an object
lol
youre amazing :)
Love the examples
;)
A node REPL is sometimes the best way to demonstrate stuff.
true that
I love the freenode rooms for the js repl
I have to go now, Mention if you need me and I'll check in later
it makes some things way easier
@Egoscio Thank you! I think i still have a lot to learn!
brianrudloff sends brownie points to @egoscio :sparkles: :thumbsup: :sparkles:
:warning: brianrudloff already gave egoscio points
@brianrudloff Best of luck!
function largestOfFour(arr) {
var finalarr = [];
for (var i = 0; i < arr.length; i++) {
finalarr.push(Math.max.apply(Math, i));
}
return finalarr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
not working
for challenge: Return Largest Numbers in Arrays
can anyone help please?
need quick advice on what to fix in my code
looks like you need nested loops
ok
function largestOfFour(arr) {
var finalarr = [];
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j < arr.length; j++) {
finalarr.push(Math.max.apply(Math, j));
}
}
return finalarr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
like this?
@Byzgig
soo u can just use i and j variables.. no indexOF needed
and... since ur 2 for loop using the same indice.. if u have this array [1,2,3]
and.. i and j are 0
u doing
u should NOT use the same element to make the sum calc
arr.indexOf(arr[i]) will return the same value of i .. also the other one.. will return j valuesoo u can just use i and j variables.. no indexOF needed
and... since ur 2 for loop using the same indice.. if u have this array [1,2,3]
and.. i and j are 0
u doing
arr[0] + arr[0] --->>> if(arr[i] + arr[j] === arg){u should NOT use the same element to make the sum calc
oh ok @moigithub
function largestOfFour(arr) {
var finalarr = [];
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j[i] < arr.length; j++) {
finalarr.push(Math.max.apply(Math, j[i]));
}
}
return finalarr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
is this what I am supposed to do? It's still outputting a empty array
@OmAgarwal2002 IF u gonna use math.max u only need 1 loop....
apply takes an array as argument
soo on that case.. u only need 1 loop to iterate the main array.. and "pick" the subarray
apply takes an array as argument
soo on that case.. u only need 1 loop to iterate the main array.. and "pick" the subarray
yeah
thats why i used one loop in the first place
i seee 2 for instructions on ur code @OmAgarwal2002
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j[i] < arr.length; j++) {
@OmAgarwal2002 still can't see any reference to arr in your code
@AshriSoft what do u mean
@moigithub so my question is then, how do i not use the same element twice, and then how do i add only the smallest indexes of the array?
@OmAgarwal2002 what data type is
j cuz j[i] is wrong
@moigithub just an int
@OmAgarwal2002 the second arg in apply is array I c j[i] which = nothing
@OmAgarwal2002 soo if
and
numbers dont have indices.... and u should access the array element instead
j have a 0 valueand
i have also 0 value ur code doing 0[0] <---is that correct ??numbers dont have indices.... and u should access the array element instead
just use one loop and ref arr[i] instead of j[i] @OmAgarwal2002
@Byzgig whats the purpose of ur job variable??
(and.. if thats what i think it is... ) i used an array variable to keep all the used values.. so i dont reuse it again
probably thats what ur job variable doing too..
(and.. if thats what i think it is... ) i used an array variable to keep all the used values.. so i dont reuse it again
probably thats what ur job variable doing too..
@moigithub job is just pushing the indexes to an array, to be added later
@moigithub yes, that is what i ma trying, and setting the value in the og array to false so it never equals the arg again
help missing letters
no wiki entry for:
missing letters
@Byzgig
if(arr[i] + arr[j] === arg && i!==j){ // compare if i is different than j.. so u not do arr[0] + arr[0]
job.push({one: i, two: j)});
@moigithub if val is 4 than what is "else if" ?
@CageEcharte sry im not following ... can u repost ur code again plz ?
order matters... @CageEcharte
(async ) code run from top to bottom... and only 1 of the if /elseif blocks gets executed
soo knowing that ....
if val is 4.. what if block gets executed ????
@moigithubfunction orderMyLogic(val) {
if (val < 4) {
return "Less than 10";
} else if (val < 6) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(7);
nvm :)
@moigithub do I need to change the other "val" ??
function orderMyLogic(val) {
if (val < 10) {
return "Less than 10"; // first block
} else if (val < 5) {
return "Less than 5"; // second block
} else {
return "Greater than or equal to 10"; // third block
}
}
// Change this value to test
orderMyLogic(9);
no.. u should NOT change ur numbers... that 4 was a test value.. to check ur code logic
soo u need to "execute" ur code mentally.. and evaluate ur if condition.. vs a value
orderMyLogic( 4 ); <--- i said.. IF val is 4.. what ur code will do ??
u have 3 blocks there
soo question was .. if val is 4.. which of those 3 blocks will get executed ?
first, second or third?
what u need to do .. is just replace val with 4.. and DO the comparation the condition is doing
@moigithub which val?
if (val < 10) { --->>> if (4 < 10) { and ask ur self.. is 4 less than 10 ?? is true or false???if its true.. then u will know which block gets executed...
function orderMyLogic(val) { <--- THAT val.. ur argument variable namesoo when u execute/call ur function like this
orderMyLogic( 4 ); what do u think willl be the value of val
thanks buddy, havent gotten it yet but progressing, @moigithub
byzgig sends brownie points to @moigithub :sparkles: :thumbsup: :sparkles:
:star2: 2016 | @moigithub |http://www.freecodecamp.com/moigithub
probably u should go back/find /read about function declarations.. what arguments are.. and how u call funcitons first @CageEcharte
not only on fcc,, but also using external resources
not only on fcc,, but also using external resources
well.. food time...
can someone tell me why i keep getting "TypeError" Cannot assign to read only property '0' of string "i'm".
in this code
function titleCase(str) {
str = str.toLowerCase();
var newStr = str.split(' ');
for(var i=0; i<newStr.length;i++){
newStr[i][0] = newStr[i][0].toUpperCase();
}
str = newStr.join(' ');
return str;
}
titleCase("I'm a little tea pot");
@Byzgig since false+1 returns 1... u also need to check if arr[i] and j are not false so it skip it
this is for the Title Case a Sentence challenge
i gotta make every 1st letter of each word capital
on Javascript strings are immutable @Symbolistic
soo u cant change part of...
u need to rebuild the whole string and reassign
(if u recall the myStr = "Jello world" exercise ) one of the very first u did
soo u cant change part of...
u need to rebuild the whole string and reassign
(if u recall the myStr = "Jello world" exercise ) one of the very first u did
myStr[0] ="H" // fail
wow that sucks
and makes things a bit more confusing
@Symbolistic Makes things less confusing. Imagine treating a string like an array you can modify at will!
That's why things like split('');
exist
and .join();
oh i see what u meant @Redmega
function titleCase(str) {
str = str.toLowerCase();
str = str.split(' ');
for(var i=0; i<str.length;i++){
str[i]=str[i].split('');
str[i][0] = str[i][0].toUpperCase();
str[i]=str[i].join('');
}
return str.join(' ');
}
titleCase("I'm a little tea pot");
took a bit of googling to figure it out
@Symbolistic Good job figuring it out :)
ty, pretty cool that i can break down a sentence into a word and into individual letters and target them specifically.
function orderMyLogic(val) {
if (val < 10) {
return "Less than 10";
} else if (val < 5) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(7);
how do I get the codes to put out less then 5?
str[i] = str[i][0].toUpperCase()+str[i].slice(1); @Symbolistic
I'm a professional software engineer and I google at least one thing a day. It's part of the job.
help format
no wiki entry for:
format
I'm having trouble figuring this out .......function orderMyLogic(val) {
if (val < 10) {
return "Less than 10";
} else if (val < 5) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(7);
``
```
good to know since once i get a job i'll be googling at least 100 times a day :D
Why is the bot not helping me with this
cuz all those were removed
Why :(
@CageEcharte put three backticks before and after your code to format it into a codeblock, like so:
console.log('hello world');
probably they want user search on forum
all wiki moved to forum
@johnngo 1 is less than 10 ur 2nd else if never in use
I flipped the if and else if statements around and it worked
@Redmega can you give a code example that is similar to mine
@Redmega :clap:
@johnngo :clap:
Can I take your message and put it into code formatting? Sure, why not. I guess copy pasting is effort huh..
function orderMyLogic(val) {
if (val < 10) {
return "Less than 10";
} else if (val < 5) {
return "Less than 5";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(7);
Heh, that was catty of me. Sorry.
What would happen when
val is 3?
return "Less than 10";
Talking to @CageEcharte , @AshriSoft . He's the one who needs help ;)
@Redmega hey angel I'm sorry, btw how do I get my code to show up like that?
@CageEcharte put three backticks before and after your code to format it into a codeblock, like so:console.log('hello world');
``` <-
Those are backticks
Usually to the left of your
1 key
I am stuck in this any help please? what I am doing wrong???``````
var count = 0;
function cc(card) {
// Only change code below this line
if (card === 10 || card === "J" || card === "Q" || card === "K" || card === "A") {
count--;
return (count +" Hold");
}
else if (card === 7 || card === 8 || card === 9) {
return (count +" Hold");
}
else if (card === 2 || card === 3 || card === 4 || card === 5 || card === 6) {
count++;
return (count + " Bet");
}
else if (count > 0) {
return (count + " Bet");
}
else if (count <= 0) {
return (count + " Hold");
}
// 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');```
mine is on ~ key :smile:
@purelight4ever backticks must be on their own lines
@AshriSoft
shift+\`` = ~, generally speaking.
Do you mean on each line?
``` <----
Then your code
--- > ```
Then your code
--- > ```
Like so
@Redmega after i put the back ticks what do I do?
Oh ok thank you
@purelight4ever dont increase/decrease count and return
make it 2 blocks...
first block increase of decrease only
then after.. evaluate count variable.. and return
make it 2 blocks...
first block increase of decrease only
then after.. evaluate count variable.. and return
three backticks. hit shift+enter. paste your code. hit shift+enter. put three more backticks.
@johnngo thank you , you are corect
cageecharte sends brownie points to @johnngo :sparkles: :thumbsup: :sparkles:
:cookie: 179 | @johnngo |http://www.freecodecamp.com/johnngo
var myStr = "FirstLine \n \ SecondLine \ \r ThirdLine"; // Change this line
ok so what excuatlly am i missing here?
ok so what excuatlly am i missing here?
@roninjedi remove extra spaces
instruction says.. NO spaces
instruction says.. NO spaces
hmm ok i didn't think the spaces mattered
```function orderMyLogic(val) {
if (val < 5) {
return "Less than 5";
} else if (val < 10) {
return "Less than 10";
} else {
return "Greater than or equal to 10";
}
}
// Change this value to test
orderMyLogic(7);```
@Redmega Thank you I will try that...
purelight4ever sends brownie points to @redmega :sparkles: :thumbsup: :sparkles:
:cookie: 102 | @redmega |http://www.freecodecamp.com/redmega
This message was deleted
This message was deleted
I give up lol...
I'll brb
Hey guys: how do i include code here? use code tags like forums? or is there a button?
three backticks before and after the code
on their own lines
@Redmega easier if u search on forum n copy the link :)
Seriously
I'm just about to lose my hair
test
\\test2\\
@Redmega do you even lift bro
\\test3\\
those are backslashes, not backticks
yea no
a back tick is like an apostrophe, but fancy
`
ahhhhhh
its the same button as the tilda (~) usually
test4
single ticks for inline code, triple ticks on their own lines for block code
well i just did it but it just t
ok ill go there tx @Redmega
americanpi sends brownie points to @redmega :sparkles: :thumbsup: :sparkles:
:cookie: 103 | @redmega |http://www.freecodecamp.com/redmega
normally if you type three backticks and hit shift+enter itll auto put the last ticks for you
'test'
This message was deleted
type ```. Hit shift+enter. Type your code. hit shift+enter. type ```
yea that was my problem
i couldn't put them on different lines
shift+enter for a linebreak
test
shoulda told me how to get back into chat mode LOLOLOL
ctrl+enter to submit
;)
so "ctr+/" bring up compose mode where you can type
multiple lines
like this
lets try ctrl+enter
test
Ah, I actually didn't know about compose mode
oooohhhhhhhhhhhhhhh!!!!!!!!!!!!!
I just shift+enter for line breaks
yea its in the bottom right crnewr of the text entry box
@Redmega
@Redmega
im out
Ciao
@Redmega (virtual beer)
: beer : :beer:
:sweet:
Wow. This chat died.
Just in awe of @Redmega 's poise
no it's on :beer: break :D
@AshriSoft :laughing:
Hi,anyone pass the Pig Latin?
why I can't pass this,I think i'm right.
@believeZJP check your code again, for example, see the result of translatePigLatin("glove");
it return 'lovegay' :D
and dont forget to read the question again, note all the requirements
Write a function nextInLine which takes an array (arr) and a number (item) as arguments. Add the number to the end of the array, then remove the first element of array. The nextInLine function should then return the element that was removed.
How to write it?
can anyone create an attendance website
or attendance app
@Vipersad Elaborate?
a attendace tracker that you scan on a barcode
it keep track on attendance
by scanning
if you can help you create and I will pay you
Well, this isn't much of a recruitment area. we're here to guide you on how to make it yourself ;)
can you please help me make it
I will do it for 25k
Do you have any programming knowledge?
lmao
a little bit
I just don't know how to start
please help
I don't know what attendance means. I just looked it up and still I have no clue
its where you keep track of people who are here
such as if someone show up on in a place they either mark them preset or absent
they do that on their own phone or on a device at the place
I will make you site like this for 30k https://www.tracksmart.com
3000
30000 USD
that a lot for an attendance website and I can make two social media app like Instagram for that
Do you know node.js? (Ever heard of it?)
no
You should hire someone from fiverr.com they can make 3 social media websites for 5 USD
The project you are describing requires a backend language as well (code that runs on a server, and interacts with a database)
So I am reading this code: http://codepen.io/dsgnrmdy/pen/qbjEGy ... and I do not understand why the author is using a script src="http...js"
With node.js, you can do full stack development with a single language. http://nodejs.orh
*.org
ok
Then you need a database to store your users. Mongodb is pretty popular on the node.js world, and it's easy to start with, plenty of documentation online
do you know where I can find a attendance template
So now you have a clientside, backend, and database all powered by Javascript, awesome right?
Well, I'm not familiar with templates, if that's the path you choose to take.
i need som help on Free code camps record collection. in java script. is it ok to post code here?
And they tend to do a subpar job compared to actually doing something by hand with dedication
Yeah just format your code with triple backticks
'''
:bulb: to format code use backticks! ``` more info
'''
:bulb: to format code use backticks! ``` more info
whoops
(Not single quotes, back ticks)
lol
@joufflu if you're writing code outside of codepen, that's where/how many include links to external scripts.
little CampberBot had a few too many this evening
@tbushman gotcha
@tbushman thank you
joufflu sends brownie points to @tbushman :sparkles: :thumbsup: :sparkles:
:cookie: 138 | @tbushman |http://www.freecodecamp.com/tbushman
that's a good cookie
```
```
joufflu @joufflu lol
shoot ill just do that
Hi guys... Can aanyone help me with switch statement?
@orionishere what's the problem?
@Chrono79 here is my code ````
function caseInSwitch(val) {
var answer = "";
// Only change code below this line
val = 1;
console.log("alpha");
break;
// Only change code above this line
return answer;
}
// Change this value to test
caseInSwitch(1);
```
the message I get is unexpected break....
I don't see any
switch's
@orionishere look at the pseudocode example:
switch (num) {
case value1:
statement1;
break;
case value2:
statement2;
break;
...
case valueN:
statementN;
break;
}
you have to use the same structure
Also read mdn page for more examples and longer explanation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch
function updateRecords(id, prop, value) {
if(collection.hasOwnProperty(id)){
if (prop == "tracks"){
if (value === "" && collection[id].hasOwnProperty(prop)){
collection[id][prop].push(value);
}else if(value === "" && collection[id].hasOwnProperty(prop) === false){
collection[id][prop]= [value];
}else{
delete collection[id][prop];
}
}else{
if(value === ""){
collection[id][prop] = value;
}else{
delete collection[id][prop];
}
}
}
return collection;
}
I went through it.... I have more doubts now.... @Chrono79
@THalletProtech that's wrong, you have to delete the property if value is empty string
I've changed the code according to structure....
let's see it
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");
function caseInSwitch(val) {
var answer = "";
// Only change code below this line
switch (val) {
case 1:
console.log("alpha");
break;
}
// Only change code above this line
return answer;
}
// Change this value to test
caseInSwitch(1);
@Diego Mayer is that not what i am doing
dont know what does it want me to do
@THalletProtech no
@orionishere that's almost ok (but incomplete), you have to change answer value instead of using console.log, add the other cases too
I just wanted to check first with one case... so I just put in code for one case... However I've tried with full code.... not working.... @Chrono79
@nicopcat the exercise is asking for a sentence to be built using the 4 word types given. it may be easiest to begin by making a complete (spacing & punctuation) sentence, using the 4 words. to make sense, the complete sentence will require a few "filler" words. :sparkles:
@orionishere do the change I told you, your function returns answer, set its value in each case
im not sure what you mean diego
thanks @Chrono79 .... i was able to do it.....
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@THalletProtech
function updateRecords(id, prop, value) {
if(collection.hasOwnProperty(id)){
if (prop == "tracks"){
if (value === "" && collection[id].hasOwnProperty(prop)){
collection[id][prop].push(value); // if value is "" you should delete the property, you're not doing that here
}else if(value === "" && collection[id].hasOwnProperty(prop) === false){
collection[id][prop]= [value]; // or here
}else{
delete collection[id][prop];
}
}else{
if(value === ""){
collection[id][prop] = value; // here either
}else{
delete collection[id][prop]; //here you shouldn't delete the property
}
}
}
return collection;
}
@orionishere :+1:
@ndburrus still dont know how to type T T
can u gimme an example
@nicopcat review this past challenge: https://www.freecodecamp.com/challenges/constructing-strings-with-variables
@nicopcat
result=myNoun + " " + myAdjective + " " + and keep going. Be sure to put actual spaces between the quotes
This message was deleted
@purelight4ever separate card evaluation of count evaluation, return only in the last one
```
How can I do that please?
How can I do that please?
@purelight4ever do two separate if/else blocks
Don't return when evaluating card, only change count value there
Don't return when evaluating card, only change count value there
@Chrono79 how i send you points?
@Chrono79 I will try that... Thank you
purelight4ever sends brownie points to @chrono79 :sparkles: :thumbsup: :sparkles:
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@purelight4ever
THalletProtech just saying thanks and mentioning me
@bibubi Thank you so much... I wasted so much time trying to figure it out....!!!
purelight4ever sends brownie points to @bibubi :sparkles: :thumbsup: :sparkles:
:warning: could not find receiver for bibubi
@bibubi that's a weird way of doing it but maybe it works ;)
@camperbot How can I do that? (I am new here!!)
:smile:
@coffeebeanzz @Chrono79 @ndburrus thank you so much :sparkles:
nicopcat sends brownie points to @coffeebeanzz and @chrono79 and @ndburrus :sparkles: :thumbsup: :sparkles:
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:star2: 1925 | @chrono79 |http://www.freecodecamp.com/chrono79
you're welcome @nicopcat :)
@nicopcat you're welcome! :palm_tree:
bye
@purelight4ever :sparkles:
Hi all, I'm struggling to wrap my brain around introducing a Twitter widget to my quote generator. I could use a hand if anyone's available.
My work so far: https://codepen.io/SaxManMike/pen/jAgrEx
Pairwise falls to @adventurebear!
i'm stuck on the Seek and Destroy challenge. I looked at all the references on MDN, w3schools , and tutorialspoint.com. can someone give me a hint?
```javascript function destroyer(element, index, array) {
return (element != arguments[1]);
}
var filtered = array.filter(destroyer);
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
```
@mejorna I am sorry, I am stuck on that one too. I don't understand the whole arguments functions back-and-forth. :(
@SaxManMike the url 'http://twitter.com/share?' plus whatever text.
@mejorna destroyer is a function,how coud you make it as a argument
@tbushman I'm not sure what you mean.
@sunpeng897570 how did i make it an argument?
Once you've got the quote text, you can set the html attribute of the button to the twitter share url, appending the quote text after the question mark.
err href attribute
Do I need to include any other code in the JS section to make it work?
@sunpeng897570 here's an example http://www.tutorialspoint.com/javascript/array_filter.htm
@SaxManMike si. When I did mine, I removed the twitter share button each time the new quote was generated. Then, when the new quote was appended, a new twitter button with the quote text was appended back
one thing , for dynamically-added buttons , you need to use $(document).on('click', '#buttonid', function(){}); instead of $('#buttonid').click(); ... remember that if poss.
Why is that?
Something about how the dom won't recognize it immediately .. it's just something I found out once after almost crying about a proj.
Well then, I appreciate the saved tears :)
sorry, I meant $(document).on('click', '#buttonid', function(){...}); instead of $('#buttonid').click(function(){...});
var a = 3;
var b = 17;
var c = 12;
// Only modify code below this line
a += a + 12 ;
b += 9 + b ;
c += c + 7 ;
whats wrong with my code please help.
Compound Assignment With Augmented Addition
Remove the a on the right side of the += sign
Same with all variables to the right, you don't need them with the +=
Nope, sorry, that's wrong...I'm tired :P
@tbushman This is what I wrote, it doesn't quite seem to work...
$(document).on('click','#tweet', function(inspiration){
$("#tweet").attr("href", 'https://twitter.com/intent/tweet?hashtags=inspired&text=' + inspiration);
});
$("#tweet").attr("href", 'https://twitter.com/intent/tweet?hashtags=inspired&text=' + inspiration);
});
Inspiration is the variable with the quote
The href attr needs to be changed before it is clicked
or you could do window. (load?) something-or-other. I'd have to look that up
window.open?
sounds right. I think so
Hello Does anyone use React? I can't figure out its behaviour...
I use React to trigger Bootstrap modal --> include some input field
The problem is whenever I click on those input field, I cannot scroll anywhere anymore...
I use React to trigger Bootstrap modal --> include some input field
The problem is whenever I click on those input field, I cannot scroll anywhere anymore...
any idea?
Oooooo, so close! It isn't passing my variable for some reason
Oooooo, so close! It isn't passing my variable for some reason
It says "[object Object]"
Is that because my inspiration variable is private as part of the quote function?
function quoteText () {
var num = Math.floor( Math.random() * quotes.length);
inspiration = quotes[num];
return inspiration;
}
var num = Math.floor( Math.random() * quotes.length);
inspiration = quotes[num];
return inspiration;
}
what does console.log(num) tell u?
That it's undefined?
This message was deleted
'''
:bulb: to format code use backticks! ``` more info
Hello, does anybody use React? @SaxManMike @tbushman
@edmundtfy I haven't gotten into React just yet. sooon. sorry
@tbushman never mind ^_^
@edmundtfy one thing, pointer-events: auto; vs. pointer-events: none; is a thing to investigate sometimes (css) on things like scrolling probs
Hello. I'm stuck on item #5 of the Profile Lookup challenge. What am I doing wrong? ```for (var i=0; i < contacts.length; i++) {
if (contacts[i].firstName == firstName)
if ( contacts[i][prop] )
return contacts[i][prop];
} //items #1-#3 work
{ return "No such contact"; } //item #4 works
if (contacts[i].hasOwnProperty(prop) === false )
return "No such property";
@SaxManMike you're missing the last part of the math.random deal
Math.floor(Math.random() * (max - min)) + min;
so your num var is out of range
maybe
hey guys, I just discovered
querySelector. can anybody tell me the difference between querySelector/querySelectorAll and getElementById/getElementsByClassName? it seems like querySelector is more useful, but please let me know if I'm wrong
@tbushman thanks, investigating on that!
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@Natto278 on the last if statement, the '===false' cancels out the .hasOwnProperty() statement, I think
so it becomes if (false === false)
@tbushman Isn't the min 0, so when you simplify the equation you get what I had?
I was just guessing and haven't looked too closely , sorry
@tbushman So I need to rewrite that last if statement. Also, I think I messed up posting my code using markup. I know it's ``` <shift><enter> Paste your code <shift><enter>. But I get the last couple of commands messed up. What am I doing wrong?
so do
shift enter
then add
then shift entershift-enter gives line breaks between ```s
Like this?
```
```
si
@tbushman I left those directions at home. I'm sorry.
so if you did those ticks, then shift-entered, then pasted code, then shift entered again, and added closing ticks, ... it's a recurring issue on here. One poor man earlier almost pulled his hair out explaining
Hello,guys i got a question,heres my code :
function titleCase(str) {
var lowCase = str.toLowerCase();
var result = lowCase.replace((/\b\w/g), function(l){
return l.toUpperCase();
});
console.log(result);
return result;
}
var lowCase = str.toLowerCase();
var result = lowCase.replace((/\b\w/g), function(l){
return l.toUpperCase();
});
console.log(result);
return result;
}
I'M A Little Tea Pot
@tbushman I rewrote my code but it's still not working. ```for (var i=0; i < contacts.length; i++) {
if (contacts[i].firstName == firstName)
if ( contacts[i][prop] )
return contacts[i][prop];
} //items #1-#3 work
{ return "No such contact"; } //item #4 works
{
if (contacts[i][prop] === false)
return "No such property";
}
```
@hacu9 help formatting
help format
no wiki entry for:
format
man i can't remember what the wiki entry is
@hacu9 use three `s to outline your code.
@Natto278 I was going to say, if you remove the '===false', then the statement has the reverse meaning and you'd need to switch the content between {}s
@tbushman Would you be willing to take a look at my JS and see why the variable isn't passing to the Tweet?
@tbushman Are you saying that for then first post of my code today?
@Natto278 I would write 'if (contacts[i][prop] == 'null')' ...try that or == 'undefined' ... use console.log() to test
@karpimpski I'M A Little Tea Pot
I need M to be lowercase
@SaxManMike k momento
@Natto278 I'm not sure what post ?
@tbushman Thanks for all your help, this has been very instructive! I appreciate you not spoon feeding me the answer
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@tbushman I tried both of your suggestions, but it's still not working.
for (var i=0; i < contacts.length; i++) {
if (contacts[i].firstName == firstName)
if ( contacts[i][prop] )
return contacts[i][prop];
} //items #1-#3 work
{ return "No such contact"; } //item #4 works
{
if (contacts[i][prop] === "null")
return "No such property";
}
```
@hacu9 which exercise is that?
@tbushman Title Case a Sentence
function titleCase(str) {
var lowCase = str.toLowerCase();
var result = lowCase.replace((/\b\w/g), function(l){
return l.toUpperCase();
});
console.log(result);
return result;
}
@SaxManMike you're trying to append a function to $('#quoteMe') ... when quoteText could be a variable insteat of a function
function titleCase(str) {
var str1=str.split(" ");
var str2=str1.map(function(val){
return val.toLowerCase().replace(/\w/,val.charAt(0).toUpperCase());
});
return str2.join(" ");
}
var str1=str.split(" ");
var str2=str1.map(function(val){
return val.toLowerCase().replace(/\w/,val.charAt(0).toUpperCase());
});
return str2.join(" ");
}
@SaxManMike see what I mean? Just put var inspiration in your div instead of quoteText, and remove the quoteText function, is what I would try
@hacu9 you can just do
lowCase.replace(..).toUpperCase();I think
I think I see what you mean, I just need to figure out the syntax
function queue(arr, item) {
// Your code here
return item; // Change this line
}
// Test Setup
var testArr = [1,2,3,4,5];
// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(queue(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
return what?
@Natto278
for (var i=0; i < contacts.length; i++) {
if (contacts[i].firstName == firstName)
if ( contacts[i][prop] )
return contacts[i][prop];
} //items #1-#3 work
{ return "No such contact"; } //item #4 works
{
if (contacts[i][prop] === false) // THis , if 'null', reads 'if (null === false)'
return "No such property";
}
@tbushman
lowCase.replace(/\b\w/g).toUpperCase();
i still get I'M A Little Tea Pot, it should be "I'm A Little Tea Pot
@Natto278 ... but I haven't worked on that exercise and I just had a similar issue with an if statement yesterday... kind of guessing. sorry
@hacu9 right. I remember having the same issue, but I can't remember which exercise. Which is it called?
Title Case a Sentence
i think i just need to add something to the regex
Well, I got the code working more cleanly, but the Tweeting still isn't working
but idk what so it ignores the '
@hacu9 oh ok. Then you were on the right track. I am sorry. One moment. It's something about adding parentheses to the regexp
@hacu9 sorry. I was wrong. Go back to how you had it because you need the function as a replacer for the regex. Do that first. Accept my apologies. :P
@tbushman Did I mess up the syntax on my Tweeting code?
@tbushman its alright,thanks i appreciate help :P i just cant figure out how to ignore the '
@hacu9 Yeah, I'm looking at my soln and I replaced the " ' " with an underscore, then replaced the underscore with " ' " at the end. Totally hack-y.
@tbushman I fixed the JS code so you don't have to scroll for a thousand years to get to the code I'm working on
@SaxManMike maybe try removing 'inspiration' from function(inspiration) ? Did I mention I was an art major ? I'm not sure :P All guesses tonight.
@tbushman haha! Well, looks like I'm stuck for tonight then. I was a music major and there's no way I'm wrapping my brain around this tonight
Music is Math — (Boards of Canada) == good album;
Music!
http://musare.com/
Whatever, @camperbot
I'm starting to chat like CamperBot, which means I should retire. Best wishes y'all.
Thanks @tbushman !
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@tbushman At my local FCC meeting this afternoon, one of the campers helped me solve the Profile Lookup challenge. You were right. Some of my 'if' statements were written backwards! Thank you for your help!
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@Natto278 oh good .. someone yesterday pointed out where I had done a similar thing , and so I threw that out there :)
need help in escaping literals
js
var myStr="Here is a backslash: \\.\n\t\tHere is a new line with two tabs.";// Cha
@Natto278 and this two, you can just do an if else instead
if ( contacts[i][prop] )
return contacts[i][prop];
}if (contacts[i][prop] === false) // THis , if 'null', reads 'if (null === false)'
return "No such property";
}since you are testing if the property exist. if it does return the value from the lookup else return No such property
if contact in the ith index hasOwnProperty prop
//return value from the lookup
else
//return "No such property"
anyone please?
js
var myStr="Here is a backslash: \\.\n\t\tHere is a new line with two tabs.";
@Indhusethu no spaces on the : and \\
oh ok @wearenotgroot
@Indhusethu oh no there was space :smile:
js var myStr="Here is a backslash:\\.\n\t\tHere is a new line with two tabs.";
am i right now?
@Indhusethu nvm
nvm??
@Indhusethu you are working on this right? Escape Sequences in Strings
yes
@Indhusethu try and reset it because they changed that challenge
oh no!!:(
@Indhusethu you should have this (new text)
- FirstLine
newlinebackslashSecondLinebackslashcarriage-returnThirdLine
yeah i saw just now :)
@Indhusethu :+1:
thanks for ur time:) :+1: @wearenotgroot
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i got it
@Indhusethu np
What should I do now? Please help.
@Sohan2infoSec hint! which array method did you use in the previous challenges that added an item in an array?
@Sohan2infoSec here is the docs for Array, you can searh for methods that will fullfill those requirements from the challenge
Array
Array
I’ll try.
@Sohan2infoSec another thing do not declare a variable same name as your function arguments
function nextInLine(arr,item){
var arr = [1,2]; //<-----------that has the same name as you function argument arr(will overwrite and cause confusion)
return item;
}
function caseInSwitch(val) {
var answer = "";
// Only change code below this line
switch (val) {
case "alpha" :
return answer;
break;
case "beta" :
return answer;
break;
case "gamma" :
return answer;
break;
case "delta" :
return answer;
break;
}
// Only change code above this line
return answer;
}
// Change this value to test
caseInSwitch(1);
what is the error
@kunal47 no return statement inside the switch, just assign the value to answer variable
ok thanks
@kunal47 another thing your case should be numbers, example
case 1 : ....(value of answer should be "alpha")
case 1 : ....(value of answer should be "alpha")
ok
hi guys, I have a problem making a mouseover animation. it works the way I want, but it's very clippy. here's my code:
for(var j = 0; j < boxes.length; j++){
var interval;
var outInterval;
boxes[j].addEventListener('mouseover',function(){
var percent = -0.005;
var t = this;
clearInterval(outInterval);
interval = setInterval(function(){
t.style.background = shadeColor(boxColor, percent);
if(percent >= -0.1){
percent -= 0.005;
}
}, 10);
});
boxes[j].addEventListener('mouseout',function(){
var percent = -0.1;
var t = this;
clearInterval(interval);
outInterval = setInterval(function(){
t.style.background = shadeColor(boxColor, percent);
if(percent <= 0){
percent += 0.005;
}
}, 10);
this.style.background = boxColor;
});
}
by "clippy" I mean whenever you move the mouse, it runs the mouseOut function
hi
http://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_sidenav_push_opacity
Can the dark-screen effect be done by pure CSS?
Can the dark-screen effect be done by pure CSS?
@jamesmillerho the effect can, the on click event, no
@damakuno so is it possible to do the same page with only CSS
no
@damakuno ok thanks
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as far as I know, @jamesmillerho css only has on hover, and on active events
that means it'll do something while the mouse is on the button
but it doesn't handle a click
that's why you can do something like a dropdown list with pure css
but not a toggled menu like that
i mean drop down menu
why -webkit-filter is not working
I want to -webkit-filter: blur
I use Chrome
Can anyone tell me why I'm not getting any return on the console.log statement in the following (for Caesar's Cypher challenge/ shifting letters 13 places)
function rot13(str) {
//str = str.split('');
var rot13 = "";
for (var i = 0; i < str.length; i++){
if (90 >= str.charCodeAt(i) >= 65){
if (str.charCodeAt(i) < 78){
console.log(String.fromCharCode(str.charCodeAt(i)+13));
rot13 += String.fromCharCode(str.charCodeAt(i)+13);
} else {
var num = 90 - str.charCodeAt(i);
rot13 += String.fromCharCode(65+num);
}
} else {
rot13 += str[i];
}
}
return rot13;
}
// Change the inputs below to test
rot13("SERR PBQR PNZC");
(AKA it's empty)
@Antiaccess
str[i].charCodeAt(0)
I'm not following @jamesmillerho
@Antiaccess
90 >= str.charCodeAt(i) && str.charCodeAt(i) >= 65
@Antiaccess You can't write
90 >= str.charCodeAt(i) >= 65
now it logs
@jamesmillerho do you know how to escape sequences in strings
Here is the text with the escape sequences written out.
"FirstLinenewlinebackslashSecondLinebackslashcarriage-returnThirdLine"
this my current code
below
use escape(varname) to escape a string from a sequence
@SandeepSafalta how do i put esacpe (varname) in this code
var myStr;
myStr = "Firstline\nSecondline\\\Thirdline";
// Change this line
or where do i put it?
escape(myStr);
@xulenvirp
var myStr = "FirstLine\n\\SecondLine\\\rThirdLine";
oh. Thanks @jamesmillerho @SandeepSafalta
puth this below the variable declaration
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may i say something to shaw @ xulen
i am new in coding i just started from this morning
so am I but i started on Wednesday @SandeepSafalta
but i have previous programming experience
hey shaw can i ask you something
@xulenvirp : Welcome! :P
@SandeepSafalta : You too :D
currently i am working on yii framework
i am stuck on it
have 3 bug in my code
Lifes' too short to be still using php :P
^
At least go with node.
man i am new in js dev env
college taught us php
Node is JS :D
i know what is js dont act smart
Let me guess, the async philosophy of js is what pisses you off! :D
i know some basic of js
Acting smart? Alright then
Calm down, men! No need to be adversaries here!
True, I have better places to invest such an act.
i have knowledge about what js node and other library do but only thing that remained is i dont know coding in js properly its totally new to me
no -offence friends
offend
*
'no' is not recognized as an internal or external command,
operable program or batch file.
oh no
Give it a sec to reboot...
no -offence friends looks like a command, which means you're passing in a parameter called -offence and then you tell it who to offend - friends
:D
now i am learning about built in dialogue box
may be..
bruh you need to put down that code coffee, it's getting too deep in hed
@wearenotgroot thx.
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can someone tell me why it doesn't work
haven't done jQuery for a long,long time :sweat_smile:
@jamesmillerho add jquery on the js settings?
lol
@wearenotgroot thanks
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I wouldn't have thought of that in a million years :+1:
@jamesmillerho : You didn't have jQuery included
also, what are you trying to achieve exactly?
I'm trying to do this: https://www.canva.com/
@adityaparab I made wordpress login button yesterday
Sweet!
@jamesmillerho
Nice!
@jamesmillerho : I've made a few changes to your button. Take a look.
@adityaparab I just added cursor: pointer
one thing I did is that I contextualized your styles. and removed the button positioning from the button.
This way, you can give this css to anyone and they can just plug and play
It's a good practice while developing frameworks/library that you delegate the positioning responsibility to the users/consumers :D
@adityaparab great. thanks
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What is wrong with my 2d Collision Detection function that uses Separating Axis Theorem ?
function collisionCheck() {
/* getting all the axes from both shapes */
var axes = [];
for(var i=0; i<shape1.vertices.length; i++) {
var v1 = shape1.vertices[i];
var v2 = [];
if(i < shape1.vertices.length-1) {
v2 = shape1.vertices[i+1];
}
else {
v2 = shape1.vertices[0];
}
var edge = [v2[0]-v1[0], v2[1]-v1[1]];
var normal = [-edge[1], edge[0]];
var mag = Math.sqrt(normal[0]*normal[0] + normal[1]*normal[1]);
var unit = [normal[0]/mag, normal[1]/mag];
axes.push(unit);
}
for(var i=0; i<shape2.vertices.length; i++) {
var v1 = shape2.vertices[i];
var v2 = [];
if(i < shape2.vertices.length-1) {
v2 = shape2.vertices[i+1];
}
else {
v2 = shape2.vertices[0];
}
var edge = [v2[0]-v1[0], v2[1]-v1[1]];
var normal = [-edge[1], edge[0]];
var mag = Math.sqrt(normal[0]*normal[0] + normal[1]*normal[1]);
var unit = [normal[0]/mag, normal[1]/mag];
axes.push(unit);
}
/* projecting both shapes onto each axes */
for(var i=0; i<axes.length; i++) {
var axis = axes[i];
// projecting shape 1
var min = Infinity;
var max = -Infinity;
for(var j=0; j<shape1.vertices.length; j++) {
var vertex = shape1.vertices[j];
var proj = axis[0]*vertex[0] + axis[1]*vertex[1];
if(proj < min) {
min = proj;
}
else if(proj > max) {
max = proj;
}
}
var projection1 = [min, max];
// projecting shape 2
var min = Infinity;
var max = -Infinity;
for(var j=0; j<shape2.vertices.length; j++) {
var vertex = shape2.vertices[j];
var proj = axis[0]*vertex[0] + axis[1]*vertex[1];
if(proj < min) {
min = proj;
}
else if(proj > max) {
max = proj;
}
}
var projection2 = [min, max];
if(projection1[1] > projection2[0] && projection1[0] < projection2[0]) {
}
else if(projection2[1] > projection1[0] && projection2[0] < projection1[0]) {
}
else {
return false; // return false if projections not overlapping on any one axis
}
}
return true; // return true if projections is overlapping on all the axes
};
That's not legible, please beautify it and format using triple back ticks
'''
:bulb: to format code use backticks! ``` more info
Or use gist.github.com or hastebin.com
hello ppls, im stuck on JS Convert to Fahrenheit challange, I dont get it what should I do
Show ur code @havocZz
@marhyorh
function convertToF(celsius) {
var fahrenheit;
// Only change code below this line
// Only change code above this line
return fahrenheit;
}
// Change the inputs below to test your code
convertToF(30);
I find it actually very difficult to do :https://www.canva.com/
that is default code, i didnt change anything
@havocZz OKay! Do you know the celcius to farenheit formula??
it un-blur where the mouse point to. But I can't specify that area with css or js
the background-image is a single entity.
@marhyorh its says here Celsius*(9/5)+32, if Im not mistaken
@havocZz Yeah! you're good to go. Pass it in your code... below
// Only change code below this line
Remember case sensitivity
what about my code ?
I still didn’t get the Instruction.
Can anyone help me?
@marhyorh ty very much
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@havocZz :+1:
@Sohan2infoSec Can you tell us what you don't understand?
@Sohan2infoSec add the number, which is
item to the end of the array arr. Start with that
Yeah, I added 6 and then I removed 1. @marhyorh
But I don’t know what to do next. @Egoscio
No, you shouldn't add 6... You should add
item
@Sohan2infoSec And instead of returning
item you should returned the removed item
@Sohan2infoSec
check /FreeCodeCamp chat
@Sohan2infoSec yeah, you need to return the value that is removed
morning campers o/
morning... @BKinahan
@BKinahan morning my friend
Can anyone give me some more hints?
@marhyorh I can’t figure it out :|.
This message was deleted
@Sohan2infoSec There are two array methods that do those two things asked. Use them on
arrand item.
@Masd925 howdy o/
@BKinahan Yo!
@Masd925 U mean .push and .shift?
@Sohan2infoSec Yes.
"function should then return the element that was removed.” How can I return it?
@Masd925
@Sohan2infoSec Check what is the return value of shift method.
Sum All Primes challenge - from Wikipedia:
In number theory, a formula for primes is a formula generating the prime numbers, exactly and without exception. No such formula which is efficiently computable is known. A number of constraints are known, showing what such a "formula" can and cannot be.
Really? :D
In number theory, a formula for primes is a formula generating the prime numbers, exactly and without exception. No such formula which is efficiently computable is known. A number of constraints are known, showing what such a "formula" can and cannot be.
Really? :D
@Masd925 yeah, I just wonder how can I return that “removed” value?
Because, it is disappeared :|.
hi all
@AshriSoft hi :D.
@Milos2709 Yes, all algorithms are slow. However you can easily generate a simple brute force algorithm that passes the challenge.
function whatIsInAName(collection, source) {
// What's in a name?
var arr = [];
// Only change code below this line
var x = Object.keys(source);
for(i=0;i<collection.length;i++){
for(j=0;j<x.length;j++){
if(collection[i].hasOwnProperty(x[j])&& collection[i][x[j]] === source[x[j]]){
arr.push(collection[i]);
}
}
}
// Only change code above this line
return arr;
}
whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" });
@Masd925 Haha, it sounds nice. But can u give me the real solution?
@AshriSoft Only push if the property values match for all the source keys, not just for one key.
@Masd925 yes I know how this can be done :(
Im on the truncate a string challenge and this is my code
Hey peeps, this is supposed to output
FREE LOVE? (by moving the character selection 13 places), my output is DREE >OVE? which I don't get because the second if else tree works for the E's (R's in the input). Anyway, here's the code if anyone can give me a hint?function rot13(str) {
var rot13 = "";
for (var i = 0; i < str.length; i++){
if (90 >= str.charCodeAt(i) && str.charCodeAt(i) >= 65){
if (str.charCodeAt(i) < 78){
rot13 += String.fromCharCode(str.charCodeAt(i)+13);
} else {
var num = 90 - str.charCodeAt(i);
rot13 += String.fromCharCode(61+num);
}
} else {
rot13 += str[i];
}
}
return rot13;
}
// Change the inputs below to test
rot13("SERR YBIR?");}else if(str.length<=3) {
newstr = str.slice(0,num+3);
newstr +=("...");
console.log(newstr,str.length,num);return newstr;
}
@Sohan2infoSec Just put the
return keyword before the statement that uses .shift().
instead of returning A... it returns ...
truncateString("Absolutely Longer", 2) should return "Ab..." it returns Absolutely Longe...
@Masd925 oh, I did not think about this. Thx you.
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@Masd925 I’m so bad :(.
@Sohan2infoSec It just takes some time learn these things.
hey anybody in here know C?
Anyone? D: it keeps silicing where i dont want it to xd
thanks @Masd925 I'll try something out
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@Masd925 So it will Return the first value and then it removes the first number, right? Like doing from the outside to inside of the code.
Can anyone help with the above? I kind of need a hint so I can be distracted by coding instead of thinking about this girl...
@Sohan2infoSec
return arr.shift(); mutates the array by removing the first element and the method returns it. Then return keyword returns that removed element from the function.
``` var newstr;if(str.length>num){
newstr = str.slice(0,num-3);
newstr+=("...");
console.log(newstr,str.length);
return newstr;}else if (num>=str.length){
return str;
}else if(str.length<=3) {
var num1= num;
newstr = str.slice(0,num1-3);
newstr +=("...");
console.log(num1,newstr,str.length);
return newstr;
} ```
@Masd925 Yeah, but what is the relation of that with the topic “queue” of the lesson?
it feels like the num var isnt reaching the bottom part
@Sohan2infoSec A queue can be implemented with a JS array.
What does this requirement mean?
@Sohan2infoSec It tests whether the function does what it should.
Hi,I'm stuck on the Profile Lookup,as I don't understand the whats up with my if statement
function lookUpProfile(firstName, prop){
for (var i = 0;i < contacts.length;++i) {
if (contacts[i][firstName] == firstName && contacts[i][prop] == prop)
return contacts[i][prop];
}
}I've already tried multiple tests but no matter what I can't seem to compare those two strings. I know that by using '===' both type and value have to be equal but with '==' this rule shouldn't apply
this is just a portion of the code
@shxdow
contacts[i][firstName] <- quotes needed on firstName here
@shxdow Property existence check should be made with .hasOwnProperty() or .propertyIsEnumerable()
@Masd925 .hasOwnProperty only allows me to check the existance,not the value
@shxdow The simplest structure is two nested if's for the two checks.
@shxdow Yes, you access the value on if block. The test uses .hasOwnProperty()
@Masd925 oh,you're right. By using .hasOwnProperty iterating through the whole array is no longer necessary
// Setup
var testString = "Ada Lovelace and Charles Babbage designed the first computer and the software that would have run on it.";
// Example
var expressionToGetSoftware = /software/gi;
var softwareCount = testString.match(expressionToGetSoftware).length;
// Only change code below this line.
var expression = /and./gi; // Change this Line
// Only change code above this line
// This code counts the matches of expression in testString
var andCount = testString.match(expression).length;
error....correct...pls
@Masd925 thank you
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Hey peeps, this is supposed to output
FREE LOVE? (by moving the character selection 13 places), my output is DxRExEx >xOVEx? (the x's there to check which if/else chain it goes down - which I don't get because it works for the E's (R's in the input), but not the S or the Y. Anyway, here's the code if anyone can give me a hint?function rot13(str) {
var rot13 = "";
console.log('ABZ'.charCodeAt(2));
for (var i = 0; i < str.length; i++){
if (90 >= str.charCodeAt(i) && str.charCodeAt(i) >= 65){
if (str.charCodeAt(i) < 78){
rot13 += String.fromCharCode(str.charCodeAt(i)+13);
} else {
var num = 90 - str.charCodeAt(i);
rot13 += String.fromCharCode(61+num) + "x";
}
} else {
rot13 += str[i];
}
}
return rot13;
}
// Change the inputs below to test
rot13("SERR YBIR?");
I have some issues about codepen. Can anybody help me ?
@Masd925 what's the point in checking whether the property exists or not,the problem only cares whether values do so or not.
@shxdow The last requirement deals with contact not having property key stored in
prop.
@Masd925 but why I typed
arr.shift();
return arr.shift();
it results the same as
return arr.shift();
arr.shift();
return arr.shift();
it results the same as
return arr.shift();
Are they really equal to each other?
@Sohan2infoSec No, they are not equal.
But they still let me pass the lesson?
@Sohan2infoSec No it doesn't pass. Some problem with the page most probably.
@Masd925 oh, it’s not. Just check again. Thank you.
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@Masd925 I read the online doc for .hasOwnProperty but I cant tell whether it works even with arrays containing objects or not. Do I have to iterate throught every element in the array in order to know whether the property is there or not
@shxdow You iterate the contacts array and inside the loop block you have one contact contacts[i]. Then you should have two nested if's that test whether the contact is the one you seek (correct first name) and whether the contact has the property key stored in
prop. Simple .hasOwnProperty() test on the object is enough.
Hi. hows everybody?
@letorruella I got rushed by a swarm of mosquitoes, it wasn't pleasant :|
check for palindromes
this is my code function palindrome(str) {
// Good luck!
var liman = str.replace(/[^A-Za-z0-9]/g, '');
if (liman === liman.split('').reverse().join('')) {
return true;
}
else return false;
}
palindrome("eye");
Where am i wrong please
@shxdow contacts[i][firstName] <- quotes needed on firstName here
@Masd925 why are quotes needed
need some help in this task Convert Celsius to Fahrenheit
@Masd925 I'm sorry to bother you again but I can't seem to get it right
for (var i = 0;i < contacts.length;++i) {
if (contacts[i].hasOwnProperty(firstName) && contacts[i].hasOwnProperty(prop)) {
if (contacts[i][firstName] == firstName && contacts[i][prop] == prop)
return contacts[i][prop];
}
}
@shxdow You need to get the value of property key
"firstName". Nothing to do with the value of function parameterfirstName that would be used on the code your posted there contacts[i][firstName]
@shxdow The first if should only have the first name check, and the second the property existence check. Then only the returns on correct spots.
contacts[i]["firstName"] === firstName on the first and contacts[i].hasOwnProperty(prop) on the second if.
can any one expalin me golf code
please
i m stuck at this challenge Convert Celsius to Fahrenheit
show the code
@alexanderkopke
function golfScore(par, strokes) {
// Only change code below this line
return "Change Me";
// Only change code above this line
}
// Change these values to test
golfScore(5, 4);
condition
golfScore(4, 1) should return "Hole-in-one!"
golfScore(4, 2) should return "Eagle"
golfScore(4, 2) should return "Eagle"
ah ok you're starting out. One moment I have to look at the challenge
?????
ok
@Masd925 oh I see. thank you for helping me. passed it.
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@shxdow Good. Next do it with .reduce() method ;)
help meeeeeeeeeeeeeeeee
no wiki entry for:
meeeeeeeeeeeeeeeee
@alexanderkopke??
@nidsnitesh ok it seems you can make some if statements but you should also make a calculation to see which string to return
Hey guys I am trying out the escape sequences in strings but it’s not working
var myStr = 'FirstLine\n SecondLine\\ ThirdLine\r’
var myStr = 'FirstLine\n SecondLine\\ ThirdLine\r’
Not sure I am doing this correctly
@nidsnitesh the first could be something like: if (strokes === 1){ return "Hole-in-one!"}
@pinglinh FirstLine newline backslash SecondLine backslash carriage-return ThirdLine <-- you have newline but after there should be a backslash. After SecondLine you put backslash, good, but then carriage-return is needed. You put the carriage returna after ThirdLine it should be before
@alexanderkopke ooooooooo lemme try
FirstLine
\SecondLine\
ThirdLine
the output should look like that I think
var myStr = 'FirstLine\n \SecondLine\ \rThirdLine';
@pinglinh no spaces - and backslash is escpaed by a second backslash - see the table
var myStr = 'FirstLine\n \\SecondLine\\ \rThirdLine’;
nearly working
@pinglinh no spaces
@sjames1958gm okay lemme try
@sjames1958gm OMG thank you!!!!!!!!!!!!
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@alexanderkopke @sjames1958gm thanks for your help guys :D
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@pinglinh :+1:
Help me with Word Blanks pls
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
result = myNoun + myAdjective + myVerb + myAdverb;
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat", "little", "hit", "slowly");
no wiki entry for:
me with word blanks plsfunction wordblanksmynoun myadjective myverb myadverb var result your code below this line result mynoun myadjective myverb myadverb your code above this line return result change the words here to test your functionwordblankscat little hit slowly
I'm on the Convert Celsius to Fahrenheit, and am unable to pass it for some unknown reason. I tried fahrenheit = (celsius *9/5) + 32. Why is this wrong?
@txsrangers fahrenheit = celsius *9 / 5 + 32;
@txsrangers should be fahrenheit = celsius * 9/5 + 32;
@txsrangers coz you are multiplying celsius by 9/5 and adding 32 to get the conversion in fahrenheit
Hmm...the question doesn't read that way, but I'll try that.
@pinglinh The order of the factors does not alter the product
true, but I wouldn't think the parenthesis would cause a problem.
fahrenheit = celsius * 9/5 + 32; i have it like this
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
result = myNoun + myAdjective + myVerb + myAdverb;
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat", "little", "hit", "slowly");
var result = "";
// Your code below this line
result = myNoun + myAdjective + myVerb + myAdverb;
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat", "little", "hit", "slowly");
Whats wrong with this
(not the first line)
Actually, the parenthesis were fine. I was spelling fahrenheit wrong. lol.
thanks for the help
@BlueExe yeah I was just following the order at which the question was worded
wordBlanks("dog", "big", "ran", "quickly") should contain all of the passed in words separated by non-word characters (and any additional words in your madlib).
wordBlanks("cat", "little", "hit", "slowly") should contain all of the passed in words separated by non-word characters (and any additional words in your madlib).
error on that 2
@BlueExe Your output
"catlittlehitslowly" from the function is not a sensible sentence.
You need some spaces and filler words and perhaps a full stop at the end.
I tried with
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
result = myNoun + myAdjective + myVerb + myAdverb;
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat,", " little,", " hit,", " slowly.");
but doesnt work
@BlueExe Don't add spaces to the test function call.
HOW?
Alter the function code only.
@BlueExe
"A large "+myNoun+" ate my dinner." In that fassion.
I dont understand
@BlueExe A function call passes some words that are stored on those function parameters
myNoun etc. You use the parameters to make a big sentence (string).
Then whatever words are passed, the return from the function is a sensible sentence.
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb) {
var result = "";
// Your code below this line
result = "A "+myAdjective+" "+myNoun+" ate my dinner "+myAdverb+", and then I "+myVerb+"the table.";
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("cat", "little", "hit", "slowly");
Still not worgking
Sorry i missed a space
Hi
I am kinda stuck with local scope and functions. I think there's a bug here
@kristerChawa I believe there are no bugs there. The description used to be somewhat confusing though.
It says that I should remove the console.log. I've removed it and declared a global variable already but still not working
@kristerChawa Try removing both the console.logs.
I've already tried it but still not working.
@kristerChawa Post your code here.
@kristerChawa Don't touch the
'use strict'; at the start of function. It should be there on its own line.
@kristerChawa It says do not create a global myVar which you have
Good morning.
@revisualize Hey early out there in WA
@kristerChawa There is no bug. You have a global variable.
@sjames1958gm I didn't create a global myVar at first and it's still not working .
@kristerChawa Line 8.
Remove line 8
hey guys i just want to know how to call the parameters after the array in seek and destroy challenge, anyone? thanks :D
// global stuff
function name(name) {
return name; // Stuff in the local scope to the function.
}
// More of that global stuff.
@jcfa01
arguments object.
@jcfa01 Read the arguments object link -
okay thanks
@jcfa01 You do realize that those links are there to help you?
@revisualize i check filter, i thought i knew arguments, guess not haha
@jcfa01 arguments is going to be a new and important concept - used in later challenges.
@sjames1958gm hey
@danydin hello
one question abotu git
if i make a commit to one file it saves all the files or just this specific one?
if you include the file name on the commit then only that one. if you don't it will commit all
maximum call stack size exceeded怎么分析解决
ok thanks @sjames1958gm
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@kelearning that means you've infinite loop there
check your loop func
@kelearning Are you doing recursion?
Good morning all! Anyone available help me with a dumb question?
@mikelafalce Sure -
Hi! Could anyone tell me how I can post a picture of what I'm coding, just like a user did a little bit above please?Thanks
why the line doesn't goes to the opposite corner
explain format
no wiki entry for:
format
```js [SHIFT+ENTER]
// your code here
```[CTRL+ENTER or CMD+ENTER to send]
Please do not confuse `s with 's.
Also note that the ```s need to each be on their own lines
The ` key can usually be found on most keyboards up next to the 1 key.
If you hit SHIFT+` it will give you the ~.
Example:
```
code
```
...
Output
// your code here
```[CTRL+ENTER or CMD+ENTER to send]
Please do not confuse `s with 's.
Also note that the ```s need to each be on their own lines
The ` key can usually be found on most keyboards up next to the 1 key.
If you hit SHIFT+` it will give you the ~.
Example:
```
code
```
...
Output
var code = undefined;
hashtag-i.am.not.a.campbot.replacement
Hi, is it possible to make an array from a calculation and push that array into another array. I think I already finding the answer
that's not how hashtags work. that's not how any of this works.
@mesmoiron Yes, array elements can be any values (primitives or objects like arrays).
Or even a reference to the array itself. I dare not call that array by its name.
OUROBOROS
@Masd925 ok thank you :-)
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help
Can someone please explain which practice is better and why?
var myArray = Array.prototype.slice.call(arguments,1) or var myArray = array.slice.call(arguments,1)
This message was deleted
@BKinahan There is serious scientific study on the subject of whether our universe is a computer simulation. One possible way to find out is to make heavy calculations that would crash the simulation running our universe. Just creating those kinds of objects you mentioned there could eat away our world. Hmm...maybe a black hole is really an OUROBOROS?
@BKinahan but is it better to extract dirrectly or use a prototype to build the new array?
@Masd925 I would argue that you couldn't make any conclusions based on that, since a simulation crash would break causality
@dbeczuk you're not really using a prototype, you're just accessing the
slice() method which is a property of the Array prototype
@BKinahan Yes, it would not be "finding out" if we suddenly ceased to exist.
@Masd925 I just want to understand why would I use one and not the later one wich extracts the slice dirrectly from the array provided?
@Masd925 is the Array.prototype.slice faster than array.slice?
@dbeczuk
[].slice() is shorter to write than Array.prototype.slice(). No difference otherwise.
@Masd925 so is no drawback otherwise.
@jamesmillerho Put the width/height in the canvas object, not css -
http://www.ckollars.org/canvas-two-coordinate-scales.html
http://www.ckollars.org/canvas-two-coordinate-scales.html
they do the same thing.
function lookUpProfile(firstName, prop){
// Only change code below this line
for(i=0; i<contacts.length;i++){
for( var key in contacts[i]){
if (firstName == contacts[i].firstName && contacts[i].hasOwnProperty(prop)){
return contacts[i].firstName;
return contacts[i].prop;
}
}
}
// Only change code above this line
}
@PrivateRoom5 The for .. in loop is not needed - as you are not using key. You cannot have two returns, use brackets with prop
Hi anyone can help me please. It says unreachable return after return
@PrivateRoom5 Remove the first return and fix the second - you are only suppose to return the prop (as you are given the firstname)
so I can have as many console.log() as I want but just one return
@sjames1958gm nope I found that canvas ratio is fixed width = height *2 so if you change that ratio the content ratio will change to but thanks anyway
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@Masd925 thanks :)
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@jamesmillerho
<canvas id="one" height="200" width="200"></canvas> this worked
^proper way to do it
"When no width and height attributes are specified, the canvas will initially be 300 pixels wide and 150 pixels high."
lol
magic
thanks @sjames1958gm @BKinahan
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"The element can be sized arbitrarily by CSS, but during rendering the image is scaled to fit its layout size: if the CSS sizing doesn't respect the ratio of the initial canvas, it will appear distorted." https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Basic_usage
@jamesmillerho Thanks to you - learned something new :)
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@kristerChawa if you didn't get your question answered about the console issue, I had the same problem, and if you refresh your browser and don't assign myVar to 'strict', it will pass. https://github.com/FreeCodeCamp/FreeCodeCamp/wiki/Refresh-Your-Browser-Cache
@PrivateRoom5 Return leaves the function directly, so you cannot have a return followed by a return
Multiple returns in a function are allowed/used but need to be in different paths in the code (such as
Multiple returns in a function are allowed/used but need to be in different paths in the code (such as
if () { return; } else { return; })
@sjames1958gm thx for your help and time. Still I haven't passed the lesson.I'll keep trying
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```
function updateRecords(id, prop, value) {
if (prop === "tracks" && value !==""){
if (collection[id][prop]){
(collection[id][prop].push(value));
} else{
collection[id][prop] = [value];
} else if (value !==""){
collection[id][prop] = [value];
}else{
delete collection[id][prop];
}
}
return collection;
}
check*
@BKinahan After some further reading some claim that Array.prototype.slice() is faster than [].slice() because [] is an instence of Array.
but I am not sure if that affects the performance on small collections of data.
and it might be relevant on large amounts of data
@Lieutenant4
[value];
which one?
should be value , lose the []
and you have an else if after else.
@Lieutenant4 - one thing that you can do is to group all of the actions when the
value !== '' within one if block:if ( value !== '' ) {
// do the things here if the value is not blank
} else {
// do the things here if the value is blank
}
else if never goes after an else. Else is the last action in an if else loop. and you have else .... else if .... else
okey got it, thanks both of you
Dear all,
I am working at Profile Lookup task
my code as below,it's dosen't work,any can help me?
function lookUpProfile(firstName, prop){
// Only change code below this line
var _type;
for(var i=0;i<contacts.length;i++){
if(contacts[i].firstName!=firstName)
{_type="No such contact";}
else{
switch(prop){
case "lastName":_type=contacts[i].lastName;
break;
case "number":_type=contacts[i].number;
break;
case "likes":_type=contacts[i].likes;
break;
default: _type="No such property";
}
}
}
return _type;
This message was deleted
pls..help
@sunpeng897570 how can I help you?
function lookUpProfile(firstName, prop){
// Only change code below this line
var _type;
for(var i=0;i<contacts.length;i++){
if(contacts[i].firstName!=firstName)
{_type="No such contact";}
else{
switch(prop){
case "lastName":_type=contacts[i].lastName;
break;
case "number":_type=contacts[i].number;
break;
case "likes":_type=contacts[i].likes;
break;
default: _type="No such property";
}
}
}
return _type;// Only change code above this line
}
..
...
@jamesmillerho I don't why it's doesn't work
Profile Lookup
@sunpeng897570 I suggest you write what you want the function to do in English first
@sunpeng897570 or Chinese
@sunpeng897570 then "translate" that to Javascript
@sunpeng897570 this may be useful: :sparkles:
ok, let my try, thx!
@sunpeng897570 check this..
var a;
a=1;
a = 2;
a = 3;
which will be the value of a ??? 1, 2 or 3 ??
var a;
a=1;
a = 2;
a = 3;
which will be the value of a ??? 1, 2 or 3 ??
a = 3 at last .. why ?
@Sohan2infoSec sorry, i was off
@ashish1729 yea.. question was for @sunpeng897570 thats why on the message have mentioned his name.. cuz his code above didnt work..
soo giving him another example WHY doesnt work....
soo giving him another example WHY doesnt work....
a=3
ok sorry @moigithub
:+1: @ashish1729
Hey guys, I'm Shivan, from India !
hey @shivan11 .. whats up
@Shivan11 Welcome
@sunpeng897570 soo if u check ur loop..
it will ITERATE on all the contacts objects..
and compare each of those names.. vs the firstName u pass
soo IF the first contact match the name.. ur variable _type will be whatever contact property it have...
but on the NEXT check.. contact will NOT match.. soo it overwrite _type value
... ur code on each iteration will CHANGE _type value
it will ITERATE on all the contacts objects..
and compare each of those names.. vs the firstName u pass
soo IF the first contact match the name.. ur variable _type will be whatever contact property it have...
but on the NEXT check.. contact will NOT match.. soo it overwrite _type value
... ur code on each iteration will CHANGE _type value
how to draw this triangle with javascript
3 angles are 96 , 42, 42
@moigithub got it!thank you!
// Example
var firstName = "Tyler";
var lastName = "Langan";
// Only change code below this line
does anyone know why this challenge isn't working?
@TylerL-uxai that 2 lines looks correct
but.. depends what the exercise is asking u
but.. depends what the exercise is asking u
thank you @moigithub
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thank you @moigithub
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So why doesn't it pass the challenge Declare String Variables?
thats ALL the code u have ???.. u suppose NOT change the code above.. and
ONLY write ur code BELOW that line
ONLY write ur code BELOW that line
oh, so let it be declared as Alan Turing and change it below?
oh I see
I need to make the variable name myFirstName instead of first name
thank you :)
@TylerL-uxai - yes, the text that is already there is still expected to be there, the spelling (capitalization, etc., as they specify) is important. The testing code is looking for very specific things, and even though it might look correct to you, the testing code cannot be fooled... :) Use the testing results to help you, also - it tells you want it is looking for!
Guys I'm new to JS and I wanted to start learning it. Should I start with the challenges directly or is there something I need to do first ?
@Shivan11 read from a book .. practice here ... // thats what i will suggest
@Shivan11 I would advice to avoid W3Schools on the subject of javascript. Otherwise a good site.
@Masd925 ha ha .. its not good for deep understanding of anything ..
@Masd925 so what do you advice.. then?
@ashish1729 Yes, but usually their information is correct although limited. On JS the material has a lot of errors.
hi can someone help me with the algorithm challenge(return largest number in arrays), I have tried my best but I cant figure it out
@ndburrus .. cool resources. thanks for sharing
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@ashish1729 you're welcome! enjoy! :palm_tree:
@Masd925 oh ok ..
@alvinkl .. whats up ?
hello everyone. i have a question for record collection challenge. can anyone tell me why doesn't this code work? 'function updateRecords(id, prop, value) {
if(prop !== "tracks" && value !== ""){
collection[id][prop] = value;
}
else if(prop === "tracks"){
if(!collection[id].hasOwnProperty(prop)){
collection[id].tracks = [];
}
collection[id].tracks.push(value);
}
else if(prop === "tracks" && value !== ""){
if(collection[id].hasOwnProperty(prop)){
collection[id].tracks.push(value);
}
}
else if(value === ""){
delete collection [id][prop];}
return collection;
}
'
function lookUpProfile(firstName, prop){
// Only change code below this line
for(i=0; i<contacts.length;i++){
if (firstName == contacts[i].firstName && contacts[i].hasOwnProperty(prop)){
return contacts[i][prop];
}
}
for(i=0; i<contacts.length;i++){
if(firstName !== contacts[i].firstName){
return "No such contact";
}
}
for(i=0;i<contacts.length;i++){
if(contacts[i].hasOwnProperty(prop) === false){
return "No such property";
}
}
// Only change code above this line
}
@Masd925 so what kind of eerror do you find there?
function largestOfFour(arr) {
// You can do this!
var result = new Array();
var current = new Array();
for(var i = 0; i < arr.length; i++) {
for(var j = 0; j < arr[i].length; j++){
current[i] = sort(arr[i][j]);
}
result[i][j] = current[i];
}
return result;
}
function sort(arr) {
for(var i = 0; i < arr.length; i++) {
for(var j = 0; j < i; j++) {
if(arr[i] > arr[j]) {
var temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
return arr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
The first two for loops work just fine but when i pass in a prop that does not exist it Does not return "No such property" any idea?
I couldn't get the largest number on each array
@alvin can you just name the challenge
Return Largest Numbers in Arrays
At today's local FCC meetup, one of the campers helped me solve items #4 and #5 of the Profile Lookup challenge. Thank you @sjames1958gm, @Masd925 @Athaman @wearenotgroot for helping me over the past two months. Special thanks to @jupiterpenny at today's FCC meeting. If I have forgotten anyone's name, please let me know so I can you brownie points, too!
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@camperbot :+1:
@PrivateRoom5 - you need to match the
firstName in order to properly return the "No such property" status - your code does not properly do that check. In fact, you can eliminate the multiple for loops and put all of the testing and checking into the body of one for loop. (Keeping in mind that you have to be careful about the "No such contact" return...)
Guys, I always get this issue when deploying my Node app, do you know what it is?
{ Error: ENOENT: no such file or directory, open '.env'
2016-08-27T14:55:25.237516+00:00 app[web.1]: at Error (native)
2016-08-27T14:55:25.237517+00:00 app[web.1]: at Object.fs.openSync (fs.js:634:18)
2016-08-27T14:55:25.237517+00:00 app[web.1]: at Object.fs.readFileSync (fs.js:502:33)
2016-08-27T14:55:25.237518+00:00 app[web.1]: at Object.module.exports.config (/app/node_modules/dotenv/lib/main.js:30:37)
2016-08-27T14:55:25.237519+00: