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i swear this thing is onna drive me nuts
the permutations challenge was the most challenging thing on here for me.
i want to fix my var final in such a way so that it removes all elements in the uniqueArray from the conc array, help?
function diffArray(arr1, arr2) {
var conc = arr1.concat(arr2);
var uniqueArray = conc.filter(function(item, pos) {
return conc.indexOf(item) !== pos;
});
var final = uniqueArray.filter(function(remove){
return remove === uniqueArray;
});
return final;
}
// conc = [1, "calf", 3, "piglet", 1, "calf", 3, 4]
//uniqueArray = [1, "calf", 3]
diffArray([1, "calf", 3, "piglet"], [1, "calf", 3, 4]);
@Zaluth use indexOf
and is uniqueArray what you want it to be?
and is uniqueArray what you want it to be?
ok cool thanks @Chrono79
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var permArray = [];
if (str.length === 1 ) {
permArray.push(str);
}
@Chrono79 in the commented example, i want my conc array to become ["piglet", 4]
im still not sure if i should split the string to start with though
@Zaluth uniqueArray is storing only the repeated values
[1, "calf", 3]
@Chrono79 yes, i want them to be removed from conc
@Zaluth then use indexOf on that array
var final = conc.filter(function(remove){
return uniqueArray.indexOf(remove)===-1;
});
so
11 % 3 = remainder
@Chrono79 you mean in the function of var final?
@lmakiwa1
= is the assignment operator. Your variable should always be on the left
@BrianCodes33
@JLuboff my friend @BrianCodes33 has some questions about loops and readability
can you help him a bit?
11 % 3 var = remainder
@iashraful I can try :D
:facepalm:
@lmakiwa1
var remainder = .....
I had been trying to explain some stuff for last 1 hr to him, but he keeps on complaining that one index should not be used for other things
function fearNotLetter(str) {
var alphabetArray = ("abcdefghijklmnopqrstuvwxyz").split("");
var lowerCase = str.toLowerCase();
var first = alphabetArray.indexOf(lowerCase[0]);
var mismatch = '';
console.log(first);
for (var i=0; i<lowerCase.length; i++){
if (lowerCase[i] === alphabetArray[i]){
return alphabetArray[i];
} else {
mismatch = first + lowerCase[i];
}
}
return mismatch;
}
fearNotLetter("abce");
here is the confusion
^
man that is some ugly code
@Chrono79 i get it, it worked
he has confusion as to why that
i can be used in alphabetArray
@JLuboff
thanks @Chrono79
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so
var remainder = 11 % 3
@iashraful @BrianCodes33 This might be above my pay-grade, but give me a minute to look
@lmakiwa1 Yes
@BrianCodes33 direct all your questions here
thanks
I am super confused about this formula to calculate range : Math.floor(Math.random() * (max - min + 1)) + min
@BrianCodes33 Whats the goal of this function?
can someone help me with apis?
@JLuboff its the "find the missing letter" challenge
^
@iashraful Got it. Wasn't recognizing it haha
anyone?
@JLuboff the issue is in for loop, Brian is confused as to why it is being used in
alphabetArray[i], because he thinks i is only applicable or in scope of lowerCase or something like that
@iashraful @BrianCodes33
i is our iterating variable. It is incrementing each loop, starting at 0 until its < lowerCase.length. It can be used to access the index of any variable
^
@BrianCodes33 please ask your confusions here, it is really helpful
people here has gone through the same confusions as you did, so they will have good answers
@BrianCodes33 Your code is stopping becuase of the return in your if statement
no
we discussed and came to if/else part
@rabowlen here is how I used it in a project
index = Math.floor((Math.random() * quotes.length) + 1) - 1;
but Brian is continuously complaining that
i should not be used in anything other than lowerCase as it is somehow hurting the readability
@iashraful But its stopping on its first iteration becuase
lowerCase[i] === alphabetArray[i] is true and the it returns a, we should probably instead test inequality then the return will work how we want.
@JLuboff yes, I know
@iashraful Well, I disagree with his sedement on that lol
@GregatGit I feel like I am overthinking something. Why are we adding 1 to the minimum and then adding the minimum to the whole thing?
the whole thing should be
if (lowerCase[i] !== alphabetArray[i]) { return alphabetArray[i]; }
@evan17gr Ask your question, maybe give your code.
but he keeps on complaining about
i
@JLuboff
@iashraful Yes I agree.
@iashraful Well...we can't help him if he doesn't want to accept that?
@forkerino i really dont understand how to access apis
@rabowlen best way to find out is go to https://repl.it/languages/javascript and see what happens when you change something - keep the range low
so I encouraged him to share him confusion here so someone else can better explain
because at early stage if you harbor some misconception, it'll come back to bite you in later stages
@rabowlen And if you are not fully getting it - don't get stuck on this - knowing how to use properly is enough for now
@GregatGit Thanks!
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@evan17gr That is a very broad statement. It really depends on the API, although you will always need an endpoint (url) and something like an $.ajax or $.getJSON function to get the data you want back.
^ or
fetch if it's a latest browser
I like $.getJSON...I find it easy...I never tried $.ajax since it looked more complicated :(
:(
$.getJSON returns a promise
@forkerino im doing the random quote machine challenge and im not surewhat to do
@evan17gr start with a basic one
@iashraful wdym?
make an array of quotes, then try to get one of the quotes from that array randomly and show in a div
I didn't even use an API for my quote machine,. I jsut created an array of quotes
then once you feel comfortable, you can use some api, but that is strictly not necessary
Looks like @iashraful had the same idea as me :laughing:
^ no, its the common idea
@iashraful i can do that
yes
@iashraful i was trying to do it that way like @JLuboff but u prevented me
i ve done that with the background
Most people use http://forismatic.com/en/api/
@iashraful @JLuboff :fearful: But it is called an API project.
@BrianCodes33 I am hurt, you backstab me
im not complaining it was just a misunderstanding @JLuboff
fcc had like 7 lessons on it and it was really bad
@iashraful not backstabbing bro
i didnt get anything
@BrianCodes33 ok, do it @JLuboff way and show us the code
@forkerino http://codepen.io/jluboff/full/GqyXdg/ no one had The Simpsons quotes in an API that I could find :)
Mind you, that project could probably use some re-working now but eh
@JLuboff that is my new favorite homepage from now on :D
function fearNotLetter(str) {
var alphabetArray = ("abcdefghijklmnopqrstuvwxyz").split("");
var lowerCase = str.toLowerCase();
var first = alphabetArray.indexOf(lowerCase[0]);
var mismatch = '';
console.log(first);
for (var i=0; i<lowerCase.length; i++){
if (lowerCase[i] !== alphabetArray[i]){
return alphabetArray[i];
}
}
}
@iashraful thanks, glad you like.
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@BrianCodes33 it is solved then
this code should pass the tests
Except...it doesn't account for if a is missing
it doesnt
if a is missing, it should return undefined
but remove that
first and mismatch
and add a return at the end
Hi everyone, I'm currently struggling with the JSON for the Wikipedia viewer
eh?
@evan17gr Yes, the lessons are bad. But the projects will help you understand what is going on. It is very common for people to stumble through them at first and not understand what is going on, but you'll learn a lot from them.
@JLuboff :+1:
I'm having problems opening the JSON and followed by returning the specified value
@BrianCodes33
function fearNotLetter(str) {
var alphabetArray = ("abcdefghijklmnopqrstuvwxyz").split("");
var lowerCase = str.toLowerCase();
var missingChar;
for (var i=0; i<lowerCase.length; i++){
if (lowerCase[i] !== alphabetArray[i]){
missingChar = alphabetArray[i];
break;
}
}
return missingChar;
}
@evan17gr You can use a quote API like the one @JLuboff linked to and just read their api documentation, that will give you an idea of the url you need to use to get the right info.
^ like this
@forkerino I always fear to point people to APIs due to the horrible CORS issues
So for the exact change algorithm problem I managed to isolate the digits and multiply them appropriately so that the tens place was multiplied by 10, hundreds by 100 etc.
But I don't understand how to deduct from CID without making it more complicated than it already is.
But I don't understand how to deduct from CID without making it more complicated than it already is.
ah this is the way i wanted to do it
@iashraful His code worked nicely before without the extra code you added ;)
Except as I said returning undefined it a is the first letter
Somebody help please?
@JLuboff yes, not it should handle the missing
a case
@JLuboff also I added the
first to handle cases where the test case is not starting from beginning, like defgi
@iashraful yeah, that's a problem for some of them. I have had good results using https://cors-anywhere.herokuapp.com/ to circumnavigate these problems.
but meh
@forkerino yes, but I think some APIs outright didn't return anything to cors-anywhere
I forgot which, but I think it was some weather api
didn't understand my queries
@iashraful didn't know that / never bumped into that problem.
Anybody?
:D
still not working
that is odd
let me check
@rabowlen adding min guarantees a value no lower than min. ( max - min + 1) this is a value between min and max. so 9 - 4 + 1 = 6
but you can never have a value that equals 6. Math.random will only return between 0 - .99. Therefore Math.floor(Math.random() * 6 ) highest possible value is 5. So if you get 5 you would need to add back min to get a max value of 9. so a number between 9 and 4.
Hmm, lol not sure if this helps
but you can never have a value that equals 6. Math.random will only return between 0 - .99. Therefore Math.floor(Math.random() * 6 ) highest possible value is 5. So if you get 5 you would need to add back min to get a max value of 9. so a number between 9 and 4.
Hmm, lol not sure if this helps
lol why are all the quotes written in russian?
@BrianCodes33 the
first variable we added back in stoneage, you need it to pass the last two tests
uh
@forkerino cors-anywhere similar to https://cross-origin.me?
@thenerdyouknow I don't think you needed to isolate the digits. Just subtract as much as you can from each of the values highest ($100) to lowest ($0.01). So if I have to give back 365.24, return 3 hundreds (or less if you have less), and move on to the other notes and coins. If you end up with 0, you know what to return.
@JLuboff yep
Does it work with openweathermap? cross-origin stopped working with it
cross-origin.me was down a lot back when I did my projects and found this alternative.
it did
still does (had to check).
hi, on chunky monkey I have an unclear problem
@evan17gr hahaha they have 2 languages, you can use a parameter for english.
function chunkArrayInGroups(arr, size) {
var arr2=[];
var j=0;
var i=0;
var k=0;
var numOfGroups=0;
if(arr.length%size===0)
numOfGroups=arr.length/size;
else numOfGroups=arr.length/size+1;
while((i<numOfGroups)&&(j<arr.length))
{
if(j%size===0)
{
i++;
}
arr2[i].push=(arr[j]);
j++;
}
return arr2;
}
var arr2=[];
var j=0;
var i=0;
var k=0;
var numOfGroups=0;
if(arr.length%size===0)
numOfGroups=arr.length/size;
else numOfGroups=arr.length/size+1;
while((i<numOfGroups)&&(j<arr.length))
{
if(j%size===0)
{
i++;
}
arr2[i].push=(arr[j]);
j++;
}
return arr2;
}
or just use russian quotes @evan17gr
can anyone help?
@forkerino It does indeed work! Sweet. My weather app works across browsers again haha
@forkerino ok ty i ll try
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@BrianCodes33 here is a layman's solution
function fearNotLetter(str) {
var alphabets = 'abcdefghijklmnopqrstuvwxyz'.split('');
var startFrom = alphabets.indexOf(str[0]);
var missingChar;
for(var i = 0, len = str.length; i < len; ++i) {
if (str[i] !== alphabets[startFrom+i]) {
missingChar = alphabets[startFrom+i];
break;
}
}
return missingChar;
}
fearNotLetter("abce");
^ seems to pass all tests
@evan17gr use
&lang=en in your url.
Hi can anyone help in chunky monkey http://pastebin.com/0DMUcg66
I'm having some troubles with two of the tests from the exact change algorithm. My output isn't passing: [ [ "QUARTER", 0.5 ] ] Does my .5 need to be formatted as 0.50? Not sure how to do this unless I format as a string.
@iashraful @BrianCodes33 It really is a lot easier if you use the suggested methods in the instructions.
@forkerino I think it'll be all confusing
the String.fromCharCode and str.charCodeAt looks all magicky
or so it did when I initially did that challenge
probably, but magic is cool, no?
CHUNKYYYY MONKEYYYY HELPPPPPP DESPERATE http://pastebin.com/0DMUcg66
@5ubz3r0 your push command is not pushing the right thing in the right place
@forkerino so should i put that at the end of this
var url="http://api.forismatic.com/api/jsonp/"; ???
why?
i deleted the
=, was a typo
here, @forkerino endorsed and recommended way @BrianCodes33
function fearNotLetter(str) {
var curr;
var prev;
var missing;
for(var i = 1, len = str.length; i < len; ++i) {
curr = str.charCodeAt(i);
prev = str.charCodeAt(i-1);
if (curr > prev+1) {
missing = String.fromCharCode(prev+1);
break;
}
}
return missing;
}
fearNotLetter("abce");
@evan17gr you also need to specify a method... Check the site http://www.forismatic.com/en/api/
@forkerino I think I used the jsonp method for forismatic
it gave me a lot of pain
for some reasons, forismatic doesn't have CORS support, but its a public api, very strange
Have a good weekend all
^ Likewise
@5ubz3r0 well, you push only 1 item in the result arr2, instead of an item the size of
size, and you push it in a subarray of the result instead of the array itself.
^ that sounded very complex @forkerino
well he's making it very complex.
what is it?
let me at 'em
:point_up: January 7, 2017 12:50 AM
@forkerino his help message was very SEO optimized
:smile:
indeed
a lot of unnecessary if/else there
I think my eyes tried to run off
mine?
this isnt laymans, but thx anyway
so how would you do it more simply? :)
@iashraful @BrianCodes33 this was my solution:
function fearNotLetter(str) {
var start = str.charCodeAt(0);
for (var i = 1; i<str.length; i++){
if (str.charCodeAt(i) !== start+i) {
return String.fromCharCode(start+i);
}
}
return undefined;
}
@forkerino nice nice
let me try and beat it
wait
@5ubz3r0 I would push a slice (with a size of
size) of the arr to the result and do that as many times as necessary.
var myStr= 'FirstLine\n\'"SecondLine\"'\rThirdLine'; // Change this line
trying to space out this code
trying to space out this code
hello??
@iashraful would love to see an even more concise answer, make sure to pm it to me once you found it, because it's 1 am here and am going to sleep.
ah
its 2 am here
hahaha
and am trying to heat my room before I turn it
too cold today :(
good luck with that. #codeallnight
night night /all
Hows it going im having some trouble getting the last two test cases to work for this algorithm
V
function sumAll(arr) {
arr = arr.sort();
var min = arr[0];
var max = arr[1];
var orig = min;
var result = 0;
while (min <= max) {
min += min + 1 ;
result = min;
min++;
}
return result + orig;
}
arr = arr.sort();
var min = arr[0];
var max = arr[1];
var orig = min;
var result = 0;
while (min <= max) {
min += min + 1 ;
result = min;
min++;
}
return result + orig;
}
var myStr = "FirstLine\n\'\SecondLine\'\\r;ThirdLine"; // Change this line
i'm stuck on the nesting for loops challenge and i keep returning an error "cannot read property 'length' of undefined
but it is defined though it's the array for the challenge
function multiplyAll(arr) {
var product = 1;
// Only change code below this line
for (var a = 0;a < multiplyAll.length;a++){
for (var b = 0;b < multiplyAll[a].length;b++){
product *= multiplyAll([a][b]);
}
}
// Only change code above this line
return product;
}
// Modify values below to test your code
multiplyAll([[1,2],[3,4],[5,6,7]]);
any one here for helping me with my local weather ???
whats wrong @Waelazar
@doodleslr you're using the wrong thing
multiplyAkk is the function @doodleslr
multiplyAll is the name of the function
use
arr which is the array.
arr.length?
yes
@HeebieGeeBee i solve it
thx @Manish-Giri
thx @Manish-Giri
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product *= multiplyAll([a][b]); i doubt this will work too
ill get to that bit when i get past this
welcome @doodleslr
do i need to define which array arr.length is for?
arr is the array
arr[i] will be the sub array
Can anyone help me with this algorithm? I get the first three test cases right just not the last two
function sumAll(arr) {
arr = arr.sort();
var min = arr[0];
var max = arr[1];
var orig = min;
var result = 0;
while (min <= max) {
min += min + 1 ;
result = min;
min++;
}
return result + orig;
}
arr = arr.sort();
var min = arr[0];
var max = arr[1];
var orig = min;
var result = 0;
while (min <= max) {
min += min + 1 ;
result = min;
min++;
}
return result + orig;
}
maybe if i had any idea what all that meant
thats definately a unique approach
ill comment it right now
its ok you dont have to
@fer408 What is the name of the exercise?
i'd suggest you look at the reduce method
im guessing by the name ofthe function he needs to sum all the elements
function sumAll(arr) {
arr = arr.sort(); // sorts array from lowest to highest
var min = arr[0]; // sets variable to the lowest value of array
var max = arr[1]; // sets variable to the highest value of array
var orig = min; // variable for keeping track of initial value of min
var result = 0; // variable to store results
while (min <= max) { //condition
min += min + 1 ; // min is icremented by itself plus 1
result = min; // result is given the value of min
min++; // min is incremented
}
return result + orig; // returns the value of the result plus the initial value of min
}
sumAll([10,5]);
Hello Everyone im stuck in javascript lesson: Understand String Immutability.
@fer408 what is the challenge called
// Setup
var myStr = "Jello World";
// Only change code below this line
myStr[0] = "H"; // Fix Me
myStr = "Hello World";
Instructions
Correct the assignment to myStr to achieve the desired effect.
Correct the assignment to myStr to achieve the desired effect.
@fer408 With the name if the exercise we can know the goal of the code. It makes it easier to help you.
@GregatGit sum all numbers in a range
Can someone help me please? thanks
the name of the Algorithm is sum all numbers in a range
function sumAll(arr) {
arr = arr.sort(); // sorts array from lowest to highest
var min = arr[0]; // sets variable to the lowest value of array
var max = arr[1]; // sets variable to the highest value of array
var orig = min; // variable for keeping track of initial value of min
var result = 0; // variable to store results
while (min <= max) { //condition
min += min + 1 ; // min is icremented by itself plus 1
result = min; // result is given the value of min
min++; // min is incremented
}
return result + orig; // returns the value of the result plus the initial value of min
}
sumAll([10,5]);
@txbluebee you cant change parts of strings
@fer408 You need to add min + (min+1) + (min+2) + ... + (max)
@HeebieGeeBee what should i do?
if you wanted to change the j in 'jello world' to an h, what would you do?
knowing that you cant change parts of a string
you can only change the whole string into something else
@fer408 I built a simple for loop starting at the lowest
var lowest = Math.min(arr[0], arr[1]); and finishing at the highest
learning about the reduce mthod now might save you some time later @fer408
can someone help me with the nesting for loops challenge I know how to create for loops I dont understand how to multiply them
@fer408 as you loop through you just add to the total that you return in the end
@GregatGit @HeebieGeeBee thanks guys ill try both methods right now
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well I don't know how to multiply the nested arrays rather
whats your code look like @dseif003
function multiplyAll(arr) {
var product = 1;
// Only change code below this line
for (var i=1; i < arr.length; i++) {
for (var j=1; j < arr[i].length; j++) {
console.log(arr[i][j]);
// Only change code above this line
return product;
}
}
}
// Modify values below to test your code
multiplyAll([[1,2],[3,4],[5,6,7]]);
var product = 1;
// Only change code below this line
for (var i=1; i < arr.length; i++) {
for (var j=1; j < arr[i].length; j++) {
console.log(arr[i][j]);
// Only change code above this line
return product;
}
}
}
// Modify values below to test your code
multiplyAll([[1,2],[3,4],[5,6,7]]);
hello
@fer408 while this doesn't really require reduce - you can practice at https://repl.it/languages/javascript with reduce and other array functions
reduce method might be helpful for you too @dseif003
figured out nested loops
if there is only one array, you dont need to define which array to use in a function?
if there is only one array, you dont need to define which array to use in a function?
@AlyShmahell hello back
@HeebieGeeBee i still dont get it :(
:D
@dseif003 If you return from inside the loops then it will only loop once.
to change'jello world' to 'hello world' you just have to make it 'hello world'
I have a little problem with this js specific error! "Cannot assign to read only property", if you could help me out with it :)
@dseif003 You need to use the value inside the console.log to build product in the product variable
@AlyShmahell where are you getting that?
ok but this wants me to be able to test all the values I think by plugging in those values that would only solve for one set of values and not the others
@AlyShmahell That implies that you have tried to set single character into a string
in this simple only function
function titleCase(str) {
for(var i=0;i<str.length;i++)
if(str[i]==' ')
{
str[i]='g';
}
return str;
}
@AlyShmahell you cannot change a character in a string - strings are immutable (recall Jello World challenge)
also the two loops I have only increment the product if im not mistaken not multiply the nested array values
i'll use replace then!, sorry coming from a c background here :D
@dseif003 Your two } should be above the return.
@AlyShmahell All string functions in js return new strings.
@HeebieGeeBee like this?
// Setup var myStr = "Hello Jorld";
// Only change code below this line
var myStr = "Hello Jorld";
myStr = "Hello World";
myStr[0] = "H"; // Fix Me
ok thanks stephen
sort of but theres two lines that dont need to be there @txbluebee
@txbluebee
myStr[0] = "H"; this line must be removed as it is a type error - trying to change single character in string
oh sorry
just one
didnt realise that setup line was a comment
@txbluebee
@HeebieGeeBee @sjames1958gm I finally got it
it was kinda misleading. I kept focusing on [0]
this no repeats please exercise has depressed me
thank you both!
hey guys, any idea how to "remove all non-alphanumeric characters (punctuation, spaces, and symbols)" from a string? any help is greaaaatly appreciated!
with regex @liamllorin1
@liamllorin1 Have you investigated regex?
I shall thanks!
function fearNotLetter(str) {
var arr = str.split('');
var charCode = 0;
for (x=0;x<(arr.length - 1);x++){
charCode = (str.charCodeAt(x) + 1);
if (str.charCodeAt(x + 1) != charCode){
arr.splice((x + 1), 0, (String.fromCharCode(charCode)));
}
}
str = arr.join('');
return str;
}
fearNotLetter("abce");
Ps I'm on the "Missing Letters" challenge of intermediate JS
what is your thinking behind this?
@brycemcdonald86 You keep make arr bigger....
function sumPrimes(num) {
var numbers = [];
var primes = [];
for (i = 2; i <= num; i++ ){
numbers.push(i);
}
primes = numbers;
for (i = 0; i < numbers.length; i++){
for (j = 0; j < numbers.length; j++){
if (numbers[j+1]%numbers[i] === 0){
primes.splice(j+1,j+2);
}
}
}
num = primes.reduce(function(prevVal, currVal, index, array) { return prevVal + currVal;});
return num;
}
sumPrimes(10);My problem is why my output is always 2. Both arrays are reduced to one element. Even "numbers" array, despite I didn't operate on that array with splice. What am I missing? It should efficiently delete from "primes" all nonprime numbers.
function sumPrimes(num) {
var numbers = [];
var primes = [];
for (i = 2; i <= num; i++ ){
numbers.push(i);
}
primes = numbers;
for (i = 0; i < numbers.length; i++){
for (j = 0; j < numbers.length; j++){
if (numbers[j+1]%numbers[i] === 0){
primes.splice(j+1,j+2);
}
}
}
num = primes.reduce(function(prevVal, currVal, index, array) { return prevVal + currVal;});
return num;
}
sumPrimes(10);My problem is why my output is always 2. Both arrays are reduced to one element. Even "numbers" array, despite I didn't operate on that array with splice. What am I missing? It should efficiently delete from "primes" all nonprime numbers.
@mitron6 Oh, right i probs need to split and join the string each time. Thanks a ton
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@lotosiauke do you ever define i or j?
also why do make and array numbers
and array primes
then just make primes = numbers?
and why do you splice j +1 to j+2
well not to j+2
thats the delete amount
@lotosiauke http://www.w3schools.com/jsref/jsref_splice.asp
sorry very confused by your logic
@HeebieGeeBee Oh! thats whats wrong!
a few things
are wrong
i dont think youre going to be able to have two loops both using the variable i
but maybe im wrong
There's only one loop using var i at once.
i guess that value will just get changed
but not sure if thats very good practise
i dunno
do they work when you dont define them?
What do you mean? You want me to not define i and j?
i mean youre loops dont have i defined with like var i = 0; or summin
just wondered if that works or not
ill try
nothing changes. Now when i fixed splice arguments it returns me an array numbers [2,5,9] And dont exactly understand why. I expected [2,3,5,7]. Not long ago I made simple program in Java to search for primes with that algorithm.
Its 3:00am here. Maybe i've got to get some sleep and try in couple of hours. I dunno
i dont really fully understand what youre trying to do
Sum all the prime numbers up to and including the provided number.
so youre making an array that is made up of numbers from 2 to num?
yes
and then just trying to remove all the non prime numbers?
and then i want to erase nonprime numbers
exactly
at the end sum all of them
i mean these primes
can you put up your code again?
i cant notice when it works wrong.
function sumPrimes(num) {
var numbers = [];
for (i = 2; i <= num; i++ ){
numbers.push(i);
}
for (i = 0; i < numbers.length; i++){
for (j = 1; j < numbers.length; j++){
if (numbers[j]%numbers[i] === 0){
numbers.splice(j,1);
}
}
}
num = numbers.reduce(function(prevVal, currVal, index, array) { return prevVal + currVal;});
return numbers;
}
sumPrimes(10);
@lotosiauke I always find it difficult to follow code where you splice the array you are looping on
sorry yeah its confusing me too
How do I make the for statement loop until the end of the array? Right now it only loops once. Is it my increment statement?
function chunkArrayInGroups(arr, size) {
var newArr = [];
var arr1 = [0, 0];
for (var i = 0 ; i < arr.length ; size++) {
arr1 = arr.slice(i, size);
newArr.push(arr1);
return newArr;
}
}
chunkArrayInGroups(["a", "b", "c", "d"], 2);
@justinbarr00 Don't return inside an for loop
@justinbarr00 At least like that where it has to hit the return and exit the function
when i put it outside it is an infinite loop.
that's why earlier i made other arrays primes and spliced only primes (initially primes where the same as numbers) but i was surprised to see that numbers array also was spliced.
@lotosiauke maybe start your inner loop at i + 1 not 1 ?
@lotosiauke Yeah, that's the issue
My code is not working for the challenge Check for Palindromes, need help:
@HeebieGeeBee @sjames1958gm oh god! thx!
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function palindrome(str) {
str.replace(/[^a-z|1-9]/g, "");
if (str.toLowerCase() === str.split('').reverse().join('').toLowerCase()){
return true;
}else{// Good luck!
return false;
}
}
palindrome("tsdsdf");
My code is not Working please help
@unlawfulspoonisback All string functions return new strings.
it is for the challenge check for palindromes
you'll need to make two different strings to compare @unlawfulspoonisback
ohh... and now i got it why it didn't worked with j = 1 Thank you all!
@unlawfulspoonisback
str.replace(/[^a-z|1-9]/g, ""); a new string is returned and you're didn't store it
@lotosiauke Yep 3 % 3 is zero :)
what do you mean @Lumexralph
@unlawfulspoonisback var newStr = str.replace()
@unlawfulspoonisback Then use newStr not str
That is what I meant by all string functions return new strings.
That is what I meant by all string functions return new strings.
@unlawfulspoonisback
str.replace(/[^a-z|1-9]/g, ""); you have replaced but the new string is not used str like you did is just the str from the parameter
also youre going to replace all uppercase letters like that too
you'll either need to convert everything to lower case first or add A-Z to your regex
@unlawfulspoonisback store that string and use it to replace
str in the comparison you did like @sjames1958gm illustrated
it still did not work
put your latest code up
function palindrome(str) {
var newStr = str.replace(/[^a-z|1-9]/g, "");
if (newStr.toLowerCase() === str.split('').reverse().join('').toLowerCase()){
return true;
}else{// Good luck!
return false;
}
}
palindrome("tsdsdf");
@unlawfulspoonisback your reg Expression pattern
/[^a-zA-Z0-9]/g use this for your regez
@unlawfulspoonisback
str.split('').reverse().join('').toLowerCase() use newStr not str
and then compare your newStr string with a newStr string reversed
yeah
thankyou guys so much
it worked
how do i send brownie points
tag our names by clicking on it with thanks
@Lumexralph @HeebieGeeBee @sjames1958gm thanks
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@unlawfulspoonisback :smile:
@unlawfulspoonisback :+1:
whats the difference between string.prototypes.slice()
and string.slice()
and string.slice()
string.prototype.slice() *
can anyone give me hint of what im doiing wrong or what needs to be added
// Setup
var myStorage = {
"car": {
"inside": {
"glove box": "maps",
"passenger seat": "crumbs"
},
"outside": {
"trunk": "jack"
}
}
};
// Only change code below this line
var gloveBoxContents = "maps";
myStorage.car.inside["glove box"];// Change this line
@tech-tron nothing.
@Astewart400 YOu are supposed to set gloveBoxContents from the object access
so why would you ever use the .prototype?
@Astewart400 set it to the last line of code you have there
myStorage.car.inside["glove box"] not maps
is it just a reminder that it is a prototype
@tech-tron "".slice === String.prototype.slice this is true
Probably not useful here, but you might want to use array function on array-like objects.
Probably not useful here, but you might want to use array function on array-like objects.
Array.prototype.slice(arguments);
Hi, anyone know what am I doing wrong in this challenge? https://www.freecodecamp.com/challenges/escape-sequences-in-strings#
var myStr = "First Line\n\b\SecondLine\\rThirdLine";
The error is "myStr should have encoded text with the proper escape sequences and no spacing."
@sanchezdam
\\ that's backslash not \b
@sanchezdam backslash
\\ before and after SecondLine
The instruction is "FirstLine newline backslash SecondLine backslash carriage-return ThirdLine"
so im to put myStorage.car.inside["glove box"] inside var gloveBoxContents ""
aaah ok, i'm going to test @Lumexralph
@sanchezdam that's what's missing in the string you constructed
thks!! @Lumexralph
@Astewart400 yes
@sanchezdam :+1:
like this @Lumexralph
// Setup
var myStorage = {
"car": {
"inside": {
"glove box": "maps",
"passenger seat": "crumbs"
},
"outside": {
"trunk": "jack"
}
}
};
// Only change code below this line
var gloveBoxContents = "myStorage.car.inside[glove box]"; // Change this line
@Astewart400 no, don't make it a string remove the double quotes, but double quotes should be around
"glove box"
@Lumexralph so they only put the "" so that the var would have a value....
@Astewart400 i don't understand
the var gloveBoxContents = ""; what threw me off was the double quotes so i was asking is the only reason they put "" is so that the var would have a value
@Lumexralph
@Astewart400 i think so, maybe so you won't declare it again, have you done it?
o yes it ran i just wanted to make sure i understand
@Lumexralph thanks
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thanks @sjames1958gm , i just dont understand why we call it .prototype, seems like a waste of space other than saying its something that is built in
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@tech-tron showing a kind of inheritance or object linkage
doing the javascript lessons. using "+=" to concatenate strings. cant figure out where to put it. any one help?
@r1nc3w1nd put your code up
i an idiot. wasnt paying attention to the example.
*i'm
figured it out
@r1nc3w1nd okay, cool
@khaduch Just got your link, thanks for sending that my way!!!
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Anyone have hints as to what sections i should look back at to figure out the Profile Lookup challenge?
@vzambrano98 i can't remember but what are you to do?
I'm using an api to grab quotes in my random quote generator using ajax call and pushing the data onto an array. When i get out of the ajax call function, my array is empty, can anyone help me with this?
@Lumexralph
//Setup
var contacts = [
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
},
{
"firstName": "Sherlock",
"lastName": "Holmes",
"number": "0487345643",
"likes": ["Intriguing Cases", "Violin"]
},
{
"firstName": "Kristian",
"lastName": "Vos",
"number": "unknown",
"likes": ["Javascript", "Gaming", "Foxes"]
}
];
function lookUpProfile(firstName, prop){
// Only change code below this line
if (contacts.hasOwnProperty(firstName) && contacts.hasOwnProperty(prop)){
if (firstName===undefined){
return "No such contact";
} else if (prop===undefined){
return "No such property";
}
return contacts[prop];
}
);
//second for loop
//first for loop
// Only change code above this line
}
// Change these values to test your function
lookUpProfile("Akira", "likes");instructions:
We have an array of objects representing different people in our contacts lists.
A lookUpProfile function that takes firstName and a property (prop) as arguments has been pre-written for you.
The function should check if firstName is an actual contact's firstName and the given property (prop) is a property of that contact.
If both are true, then return the "value" of that property.
If firstName does not correspond to any contacts then return "No such contact"
If prop does not correspond to any valid properties then return "No such property"
@vzambrano98 contacts is an array of objects, you'll need a loop to get to the objects in contacts
@vzambrano98 - you're welcome (re: the link). As far as the Profile lookup...
- It's an array - look up array iteration (again)
- It has objects - and variables passed with properties - look up the accessing object properties using variables
- Look at
.hasOwnProperty - Watch out for returning the "No such contact" - many people do that incorrectly, think it through...
Q? 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.
function nextInLine(arr, item) {
// Your code here
return item; // Change this line
}I don't understand the wording of this question whatsoever. anyone have a link to read up on and or wanna help? Pls
@Lumexralph so I think I'm over thinking the loop. If the loop is as follows:
for (i=0; i<contacts.length; i++){}won't it just keep going through? What will make it stop at the appropriate firstName or prop?
and I will definitely re check myself @khaduch
maybe I should just stop asking questions and go back and read lol!
@cesarecaravaggio push
item into arr and return the the first element in arr
@cesarecaravaggio - there are array functions that add and remove elements from the start and end of the array.
.shift, .unshift, .push and .pop (I think I have those right...) Along with the description "Add the number to the end of the array, then remove the first element of array. " you have to figure out which Array methods do those things. Then try it - post code and ask more questions!
@vzambrano98 using the if control statement and return what you're to will exit the function after returning the value so that stops the loop and moreover
i<contacts.length stops the loop to when the condition is false
@vzambrano98 - look for the secret word:
If both are true, then
returnthe "value" of that property.If firstName does not correspond to any contacts then
return"No such contact"If prop does not correspond to any valid properties then
return"No such property"
:)
@khaduch @Lumexralph oooooooh okay okay. Thanks guys! I'm gonna go try again lol
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@vzambrano98 :+1:
i didn't get why I am stuck
Hi everyone. I need help with Javascropt
For some reason, my values aren't being returned
function randomArticle(){
location.href = 'https://en.wikipedia.org/wiki/Special:Random';
}
function getSearchTerm(){
var term = $("#searchTerm").val();
return term;
}
function getJson(term){
var jsonURL = 'https://en.wikipedia.org/w/api.php?format=json&action=query&generator=search&gsrnamespace=0&prop=pageimages|extracts&pilimit=max&exintro&explaintext&exsentences=1&exlimit=max&gsrsearch=' + term;
return jsonURL;
}
function processJSON(jsonURL){
var data = $.getJSON(jsonURL, function(data){
getTitles(data);
});
}
function getTitles(json){
var titles = [];
if (json && json.query && json.query.pages){
var pages = json.query.pages;
} else {
alert("Unable to process json");
return;
}
for(var id in pages){
var title = pages[id].title; // We will assign the current title to the variable title
if(title){
titles.push(title); // Push the current title into the array of titles
} else {
alert('Unable retreive title');
return;
}
}
alert(titles);
return titles;
}
$(document).ready(function(){
$('#searchWiki').on('click', function(){
var searchTerm = getSearchTerm();
var jsonURL = getJson(searchTerm);
processJSON(jsonURL);
});
});
specifically in my processJSON
It's not returning anything, or in any case, not even giving me an alert
I think something's up with my jQuery but I can't tell what
how to use word blanks ?
@bvi1994 where do you call all these functions?
// Setup
var testObj = {
12: "Namath",
16: "Montana",
19: "Unitas"
};
// Only change code below this line;
var playerNumber =["Montana"]; // Change this Line
var player = testObj[16]; // Change this Line
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");
@HeebieGeeBee At the bottom of the script
@HeebieGeeBee hello
I am not able to get playerNumber
$(document).ready(function(){
$('#searchWiki').on('click', function(){
var searchTerm = getSearchTerm();
var jsonURL = getJson(searchTerm);
processJSON(jsonURL);
});
this?
$('#searchWiki').on('click', function(){
var searchTerm = getSearchTerm();
var jsonURL = getJson(searchTerm);
processJSON(jsonURL);
});
this?
@jainishpanchal hi
okay @Lumexralph will you rephrase what you just told me? I thought I got it but I don't, there was a little typo and I missed the mark lol
using the if control statement and return what you're to will exit the function after returning the value so that stops the loop and moreover i<contacts.length stops the loop to when the condition is false
@HeebieGeeBee Correct
@HeebieGeeBee say how to use worldblanks
@sahilkatia1
function processJSON(jsonURL){
var data = $.getJSON(jsonURL, function(data){ // request here is asynchronous and not synchronous
getTitles(data); //this function is called while the data is still being requested which will return data as undefined
});
data is toring whatever value getTitles returns, remove the `var data`
}`
I need some help for playerNumber
please help
@HeebieGeeBee
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb)
{
var result = "myNone, myAdjective, myVerb, myAdverb";
// 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");
@huzaifa83 assign 16 to playerNumber and use that variable to access testObj
anyone can help me
@jainishpanchal make result equal a string that is made up of all the parameters plus spaces and wahatever other words you want to add
@vzambrano98 when you return the value it all stops, don't worry about that....just get the logics of your if statement right
@vzambrano98 - using
Within the loop, you should have an
i < contacts.length as your loop control variable will make the for loop exit after looking at all of the contacts. If you get to this point, you haven't found a contact that matches the firstName (hint... hint... )Within the loop, you should have an
if statement to check for the name match, and if one is found, you return one of the two return values that are possible when you match the firstName. (Which will end the loop at that point.)
@HeebieGeeBee not understand yet?
i dont?
@Lumexralph @khaduch working on it now
@Lumexralph Ah I see. how would get around opening JSON syncronously?
@khaduch ooh okay, I really appreciate your help.
@HeebieGeeBee 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).
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).
@bvi1994 can't remember but it'll be in the documentation but it's not a good idea
@HeebieGeeBee
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb)
{
var result = "myNone, myAdjective, myVerb, myAdverb";
// 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");
result = myNoun + ' ' + myAdjective + ' ' + .....................
ok
why does
{foo: 'bar'} === xyield true?
hello everyone, I am doing "Convert HTML Entities". I wonder if my thinking is right. Do we start building an object variable with special character for the property and HTML entities for the property value and plug it into .replace() method?
foo is true?
@relentless-coder what is
x ?
@greedylan why not just replace the charcter with the html entity?
@HeebieGeeBee
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb)
{
var result = "myNone, myAdjective, myVerb, myAdverb";
// Your code below this line
result= myNone +"dog"+ myAdjective + "big" + myVerb +"ran"+ myAdverb+"quickly";
result= myNone +"dog"+ myAdjective + "big" + myVerb +"ran"+ myAdverb+"slowly";
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("dog", "big", "ran", "quickly");
@HeebieGeeBee could not find a native javascript for doing that, please advise??
@jainishpanchal typo
myNone should be myNoun put space also in the string literals
replace using regex and the html entity?
@jainishpanchal you also need to put in spaces
@HeebieGeeBee yeah but I have multiple characters therefore the object properties and properties values
switch, if statements?
@HeebieGeeBee that takes up many lines of codes?
how else you gonna do it?
@Lumexralph ok 1 min
youve only got 5 symbols to replace
@greedylan I used replace and regular expressions for that challenge
@HeebieGeeBee thru object and accessing the property and the property values as stated in the beginning
on one solution I saw they used switch statements too
RegExp
HTML Entities
String.prototype.replace()
this is the suggested reading material for the exercise right? @greedylan
HTML Entities
String.prototype.replace()
this is the suggested reading material for the exercise right? @greedylan
@HeebieGeeBee
function wordBlanks(myNoun, myAdjective, myVerb, myAdverb)
{
var result = "myNone, myAdjective, myVerb, myAdverb";
// Your code below this line
result= myNone+ "dog" +myAdjective+ "big" +myVerb+ "ran" +myAdverb+ "quickly";
result= myNone+ "cat" +myAdjective+ "little" +myVerb+ "hit" +myAdverb+ "slowly";
// Your code above this line
return result;
}
// Change the words here to test your function
wordBlanks("dog", "big", "ran", "quickly");
wordBlanks("cat", "little", "hit", "slowly");
not working
add spaces @jainishpanchal
and its myNoun not mynone
@HeebieGeeBee yes they are
well i think youre going to have to write a few lines @greedylan
i dunno how else youre gonna do it
@HeebieGeeBee @Azbo400 Imma try stuff right now
I need help for challenge Find the Longest Word in a String:
function findLongestWord(str) {
var newStr = str.split(",");
var x = newStr[""];
var y = newStr[""];
if( x > y){
return newStr[x].length;
}
}
findLongestWord("The quick brown fox jumped over the lazy dog");
@unlawfulspoonisback why are splitting by ','?
@unlawfulspoonisback split the string, to an array loop through it and keep track of the length of each word in the array and return the largest
@unlawfulspoonisback most,sentences,are,not,written,like,this,right?
@HeebieGeeBee thanks man
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@greedylan Yeah that algo was really easy
@Lumexralph @HeebieGeeBee thanks
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how do I assign a variable to each element in the array
@Lumexralph
@HeebieGeeBee
without knowing what it is
why do you need to?
you can do something like var word1 = arr[0] or summin
but dont know why you need to
i cant wrap my head around sorted union
guys I have a question about recursion.
var countdown = function(value) {
if (value > 0) {
console.log(value);
return countdown(value - 1);
} else {
return value;
}
};
countdown(10);
how is this looping?
becuase theres nothing stopping it?
doesn't the return command stop it?
if it gets called
@unlawfulspoonisback you don't need to assign a variable to each element, just keep track of the length of each element
@sirus3020 it's not looping per say...it's just a function calling itself again
@sirus3020 but you can mimic it to be a loop, it calls itself over and over again until the condition is met
oh ok. thanks! @HeebieGeeBee @Lumexralph
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if value is 10 its going to be greater than 0 so the return is the function but 9 as parameter now and so on and so on
how are you supposed to copy and send code again???
formatting it correctly
'''
:bulb: to format code use backticks! ``` more info
:point_up:
var singleVal = array.reduce(function(previousVal, currentVal){
return previousVal - currentVal;
});Use the reduce method to sum all the values in array and assign it to singleVal.
Need help
@hariharanguru83 what do you need help with?
singleVal should be equal to the sum of all items in the array variable.
can you please explain
you just need to add
why are you subtracting
@hariharanguru83 reduce takes the element from index 0 as previous and the next at index i 1 as nextvalue...but here you sum
+ not -
is there way to import into codepen?
or do you just have to copy and paste
@hariharanguru83 take a lil time out with this https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
ok
can someone help me w/ sorted union challenge? i am so stuck don’t know where to begin or what question is asking
@HeebieGeeBee just copy the link and paste
i mean like the full code of a project
whats the problem @BrianCodes33
@HeebieGeeBee import to where exactly?
i really dont understand the question @HeebieGeeBee
i just meant you know like you can export all the files
@HeebieGeeBee i think its only for css js html i don’t think you can import a bunch of files in codepen
but i may be wrong
if you could work in a desktop and editor and just import all the files
yeah
or maybe its a paid feature
perhaps. its not used for production just as a ‘playground for front end’ as they call it
@HeebieGeeBee search for it you never know...but it should be possible only if it doesn't have the feature
@khaduch I know you are practically giving my the answer I just don't understand lol! I have a really hard time with logical order, so maybe that's what this is. but also, my code isn't recognizing my arguments "firstName" or "prop", and therefor always returning the last return statement I have(I ran it through pythontutor.com, i obviously had no idea lol)
//Setup
var contacts = [
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
},
{
"firstName": "Sherlock",
"lastName": "Holmes",
"number": "0487345643",
"likes": ["Intriguing Cases", "Violin"]
},
{
"firstName": "Kristian",
"lastName": "Vos",
"number": "unknown",
"likes": ["Javascript", "Gaming", "Foxes"]
}
];
function lookUpProfile(firstName, prop){
// Only change code below this line
for (var i=0; i<contacts.length; i++){
for (var j=0; j<contacts[i].length;j++){
if (contacts[i][j][prop]===undefined){
return "No such property";
} else if (contacts[i][j][firstName]===undefined){
return "No such contact";
} else if (contacts[i][j].hasOwnProperty(firstName) && contacts[i].hasOwnProperty(prop)){
return contacts[i][j][prop];
}}
}
// Only change code above this line
}
// Change these values to test your function
lookUpProfile("Akira", "likes");
@BrianCodes33 do you understand about arguments?
i think i get the arguments object
well first thing i saw
my code is not working:
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max.length; i++) {
if (words[i].length > max.length) {
return words[i].lenghth;
}
}
}
findLongestWord("The quick brown fox jumped over the lazy dog");
@BrianCodes33 was that arr needs to be made into a proper array of all the arguments
ok but i still dont get the question
i mean i dont get what im trying to do
i think thats the biggest prob
and how do you show a picture of you code like other people
youre trying to create an array of all the elements of all the arrays but without adding doubles and with keeping the order
''' @unlawfulspoonisback
:bulb: to format code use backticks! ``` more info
ohhh
ok
hey guys
hey @breese8009
my code is not working:
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max.length; i++) {
if (words[i].length > max.length) {
max.length = words[i].lenghth;
}
}
return words[i].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
@unlawfulspoonisback not max.length
just max, max is already a number
also look at your spelling mistakes @unlawfulspoonisback
converting an object literal into array of arrays
array of arrays*
still not working:
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max; i++) {
if (words[i].length > max) {
max = words[i].length;
}
}
return words[i].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
like this @HeebieGeeBee
function uniteUnique(arr) {
var args = Array.prototype.slice.call(arguments);
console.log(args);
args.reduce(function(){
});
return arr;
}
uniteUnique([1, 3, 2], [5, 2, 1, 4], [2, 1]);
@unlawfulspoonisback are you meant to return how long the word is or the word thats the longest?>
how long the longest word is
no idea what that method is @BrianCodes33
then dont you think you should return that? @unlawfulspoonisback
@vzambrano98 - sorry, I spaced out for a while... getting late! :)
Let's see - you do not need a second forloop- this is an array of objects, so you need the loop with the contacts.length to iterate through the array. The objects, which are accessed with contacts[i] as the reference to the object, can be directly accessed with the properties in one form or another. It looks like you have the basic idea, but that inner loop is doing something that is not useful. If it was an array of arrays, then that would be a different story.
So you're on the right track - contacts[i].firstName can be used directly to access the firstName property of each contact object.
To access the other values (other properties) you will be given property names in the variable (function argument) prop - and you can use contacts[i][prop] to access those, contacts[i].hasOwnProperty(prop) to check that the property exists on a given object.
Why don't you digest that and try to make some changes. I'm going to be on for a short while, see if you get closer... (BTW, there is still a problem with the conditions under which you are returning "No such contact"
@HeebieGeeBee well i thought i need to use reduce
Array.prototype.slice.call its this one i dont know what is
@Khaduch Okay, yes, digestion of these things.
Thanks again for your time and patience! I'm probably not going to get this before I zonk out as well lol! but I am definitely finding that no matter what it is returning "No such contact" so I will sort through that.
Thanks again for your time and patience! I'm probably not going to get this before I zonk out as well lol! but I am definitely finding that no matter what it is returning "No such contact" so I will sort through that.
and reduce will need a function that actually has something in it
i know im just setting it up
havent figured that out yet
what does Array.prototype.slice.call do?
who can write a function that turns an object literal into an array of arrays?? anyone??
@breese8009 - is this one of the lessons - which one?
gives me the arguments to work with in an objec
@HeebieGeeBee I am trying to return the length of the longest word
var obj={
name:"Holly",
age:35,
role:"producer"
}
function convertObjectToList(obj) {
return ;
}
@breese8009 can you post the challenge or code
then return that @unlawfulspoonisback
its not a challenge from FCC
what does your function return at the moment @unlawfulspoonisback
nothing
:bulb: to format code use backticks! ``` more info
@breese8009 - what is this "array of arrays" supposed to look like? would it be
[ ["name", "Holly"], ["age", 35} etc.?
@khaduch exactly
the backticks then shift enter @unlawfulspoonisback
then paste
@breese8009 if you want to iterate an object literal i’d check out the for in loop
@BrianCodes33 return
max
@Lumexralph ?
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max; i++) {
if (words[i].length > max) {
max = words[i].length;
}
}
return words[i].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
no answers haha
he means @unlawfulspoonisback
@breese8009 - there is a function, or method
Object.keys (if I remember correctly) that will give you an array of the object keys. Then you could just iterate over that array, and generate the sub arrays. Does that give you something to go on?
@BrianCodes33 :laughing: my bad sorry
return words[i].length; change to return max;
@unlawfulspoonisback return max
@HeebieGeeBee :+1:
@khaduch I think so, let me go play with it a little bit
still does not work
lol was trying to make him figure it out a bit but since you gave the answer
@unlawfulspoonisback var word is unnecessary
@HeebieGeeBee sorry bro.....lol
lol no worries
@unlawfulspoonisback str = str.split(" ") is the same
still does not work
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max; i++) {
if (words[i].length > max) {
max = words[i].length;
}
}
return words[i].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
return max
hold on
function findLongestWord(str) {
var words = str.split(" ");
var max = 0;
for (i = 0; i < max; i++) {
if (words[i].length > max) {
max = words[i].length;
}
}
return max;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
@Doegena it's not the same, remember the order of operation? right to left
does not work
why did you change it to i < max?
i < words.length
@HeebieGeeBee careful wasting your time with this guy, he is a known troll and it looks like hes taking u for a ride. Take a look at the Admin room...
:trollface: troll problems? notify admins here
@Lumexralph
var count = 0;
var max = str.split(' ');
for (var i = 0; i < max.length; i++) {
if ( max[i].length > count ) {
count = max[i].length;
}
}is the same as (well same results)
str = str.split(' ');
for (var i = 0; i < str.length; i++) {
if ( str[i].length > count ) {
count = str[i].length;
}
}
function findLongestWord(str) {
var words = str.split(' ');
var max = 0;
for (var i = 0; i < words.length; i++) {
if (words[i].length > max) {
max = words[i].length;
}
}
return max;
}
findLongestWord("The quick brown fox jumped over the lazy dog");
@Doegena seen it now?
cus its the solution
what do you mean
I changed max to words.length
yes
@Lumexralph @HeebieGeeBee thanks
unlawfulspoonisback sends brownie points to @lumexralph and @heebiegeebee :sparkles: :thumbsup: :sparkles:
:warning: unlawfulspoonisback already gave heebiegeebee points
:warning: unlawfulspoonisback already gave lumexralph points
hey guys need some help with the profile lookup excerise. I've gotten it to the point where it can return the property if the name matches and also when there is no such property. but for some reason it won't return "no such contact". a 2nd pair of eyes would be appreciated.
I don't get what I'm meant to do in the 155th Challenge
Can someone explain
here's what I got so far:
function lookUpProfile(firstName, prop){
// Only change code below this line
var i = 0;
while (i < contacts.length) {
if (contacts[i].firstName == firstName) {
if(contacts[i].hasOwnProperty(prop) === true) {
return contacts[i][prop];
} else {
return "No such property";
}
} else {
if (i < contacts.length) {
i++;
} else {
return "No such contact";
}
}
}
// Only change code above this line
}
what is the name
@jl-code1721
Word Blanks
ok hold on
show code @jl-code1721
@jl-code1721 - you are given four words as the four function arguments. You are only supposed to use string concatenation to connect them together, with a space
" " between each word, and return that "sentence" to the caller. Fairly straightforward (although this seems to be a challenge that stumps a lot of people.)
@6thSen when you're done looking through the contacts, return no such contacts
@khaduch Where do I put the spaces
@Lumexralph I think I did that
@6thSen - you will never reach that condition for your "else" because once you increment
i past the length, the while loop will terminate. You should put your return "No such contact"; in a place after the loop ends, because then you will know that you found no match.
@jl-code1721 - between each word -
myNoun + " " + myVerb, etc.
Nevermind, I worked it out. Thanks, @khaduch
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@6thSen you sure about that?
@jl-code1721 - great!
@khaduch okay, that makes sense. let me see if I can do it
@Lumexralph I think I understand what you meant now after @khaduch explained it to me
@6thSen - okay. As you probably figured out, your returns of matching contacts happens inside the
for loop - while you are within the list. After you finish the list, your loop will end, and if you haven't returned from within the loop, return after the body of the loop.
ERROR :worried: nextInLine([], 1) should return 1
function nextInLine(arr, item) {
// Your code here
return arr.shift(); // Change this line
}
// Test Setup
var testArr = [1,2,3,4,5];
// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
Theres also an extra closing bracket you dont need.
khaduch @khaduch - all done for the night... I hate to leave but my eyes are telling me to. I hope you all have happy coding hours ahead! :) :zzz:
@anshuldawar push item to arr before returning the first element in arr
recently I missed a job opportunity because I didn't how to implement jsonp to retrieve data from a on system json file. Can anyone help me with this, I don't want this to happen again
bingo
```
function lookUpProfile(firstName, prop){
// Only change code below this line
var i = 0;
while (i < contacts.length) {
if (contacts[i].firstName == firstName) {
if(contacts[i].hasOwnProperty(prop) === true) {
return contacts[i][prop];
} else {
return "No such property";
}
} else {
i++;
}
}
return "No such contact";
```
function lookUpProfile(firstName, prop){
// Only change code below this line
var i = 0;
while (i < contacts.length) {
if (contacts[i].firstName == firstName) {
if(contacts[i].hasOwnProperty(prop) === true) {
return contacts[i][prop];
} else {
return "No such property";
}
} else {
i++;
}
}
return "No such contact";
@khaduch @Lumexralph thanks
6thsen sends brownie points to @khaduch and @lumexralph :sparkles: :thumbsup: :sparkles:
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Guys I'm completely stuck on this one.
Assignment:In Computer Science a queue is an abstract Data Structure where items are kept in order. New items can be added at the back of the queue and old items are taken off from the front of the queue.
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.
Code:
// Example
var ourArray = ["Stimpson", "J", ["cat"]];
removedFromOurArray = ourArray.shift();
// removedFromOurArray now equals "Stimpson" and ourArray now equals ["J", ["cat"]].
// Setup
var myArray = [["John", 23], ["dog", 3]];
// Only change code below this line.
var removedFromMyArray;
@6thSen :smile:
@6thSen :+1: and you should check out the markdown code posting technique - follow the info in the link that will post next. '''
:bulb: to format code use backticks! ``` more info
wait that's the wrong one sorry
@6thSen - this link: https://github.com/freecodecamp/freecodecamp/wiki/code-formatting
will do :)
In Computer Science a queue is an abstract Data Structure where items are kept in order. New items can be added at the back of the queue and old items are taken off from the front of the queue.
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.
function nextInLine(arr, item) {
// Your code here
arr = testArr;
item = 5;
testArr.push(item);
testArr.shift();
return item; // Change this line
}
// Test Setup
var testArr = [1,2,3,4,5];
// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
@Yori1 a function helps you put a value at the end of an array, what is it? and another helps you remove and return the first element in an array , if you know both you're done
@Yori1
arr is the array not testArray, use the parameter
@Lumexralph Oh that's where I made a mistake then, thanks a lot
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@Lumexralph what's a parameter?
@Yori1 it's a variable/placeholder/ container in a function that holds the value of the argument passed to a function when called
@Lumexralph THanks
arr.push(item);
var shiftt = arr.shift();
return shiftt; // Change this line
}
it worked!
arr.push(item);
var shiftt = arr.shift();
return shiftt; // Change this line
}
it worked!
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@anshuldawar cool
@Lumexralph Oh that makes sense, so my code didn't work there because I was using a variable instead of a parameter in the function
@Yori1 not really, i said like a variable....not a variable but it acts like a variable in a function cos both of them holds values
it holds a value for your function when it's called
@Lumexralph Ok, I'll keep that in mind
dont know what to do in title case a sentence can you give me an idea @Lumexralph
thanks @Lumexralph
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@unlawfulspoonisback i used charAt index 0 and set it toUpperCase the added a slice of the rest of the string if that helps
@khaduch hey u still there?
nothing fancy, i think i did it all with just the return statement
can you explain to me what charat is @tech-tron
or what is does
yeah. see with the slice being the entire string except the first letter, i used the charAt(0) to return the character at index 0 (i.e. the first letter)
ahhh, im new at this
i ve been studying arrays and stuff and i PROMISE it gets better
oh thankyou
np
most of them are really simple in theory its just the fact you have to do everything in code that makes it hard
@breese8009 - I came back just for you... what's up?
oh thankyou
in your example i went for
a simple
1 make first charachter capital
2 add the entire string minus the first letter
a simple
1 make first charachter capital
2 add the entire string minus the first letter
i almost quit when i made it to the algorithmic section then i took some time through youtube to learn all these prototypes and now im currently going through it a second time and it is not pretty, the codes are long and overdrawn but they're my codes
@breese8009 - still there??
@khaduch haha thanks, I cant figure out the solution to that same code from before var obj={
name:"Holly",
age:35,
role:"producer"
}
function convertObjectToList(obj) {
return;
} cant figure out how to turn object literal into an array of arrays...
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my code is not working for the challenge title case a sentence:
function confirmEnding(str, target) {
// "Never give up and good luck will find you."
// -- Falcor
if(str.substr(-1)==target){
return true;}
else {return false;}
}
confirmEnding("He has to give me a new name", "me");
@breese8009 - I'm signing out again - not sure if this does exactly what you want, but try this:
var obj = {
name: 'Holly',
age: 35,
role: 'producer'
}
function convertObjectToList(obj) {
var myArr = [
];
for (var i in obj) {
console.log(i);
console.log(obj[i]);
myArr.push([i,
obj[i]]);
}
return myArr;
}
var result = convertObjectToList(obj);
console.log(result)
FirstLinenewlinebackslashSecondLinebackslashcarriage-returnThirdLine
var myStr = "FirstLine\n\SecondLine\\rThirdline";
I keep getting an error for this. Can anyone help me or is this a bug?
function titleCase(str) {
var word = str.split("");
word.slice().charCodeAt(0).toUpperCase();
}
titleCase("I'm a little tea pot");
what is wrong with this program?
@loop1 - sometimes your "target" is longer than one character, that could be it...
str.substring(str.length-target.length) === target;
@loop1 - you do have to use
target.length in there.
@jrsbali
\\ before and after SecondLine
what this mean?
function titleCase(str) {
var word = str.split("");
word.slice().charCodeAt(0).toUpperCase();
}
titleCase("I'm a little tea pot");
what are you trying to do? @unlawfulspoonisback
title case a sentence
@khaduch what is this mean ?(str.length-target.length)
why aren't you splitting by spaces? word = str.split(" ");
Isnt title casing making the first letter of each word capital
function lookUp(firstName, prop){
// Only change code below this line
for(var i=0;i<contacts.length;i++){
if(contacts[i].firstName == firstName){
if(contacts[i].hasOwnProperty(prop)){
return contacts[i].prop;
}else{
return "No such property";
}
}
if(i == contacts.length-1){
return "No such contact";
}
}
yes
You are splitting the word by letter, not by spaces. So that's the first change
@fenghuilu
prop is a variable dot method won't work use [ ] method
@loop1 - you take the length of the
str argument, and subtract the length of the target argument, and that is what you pass to the .substring method. It tells you where in the string (the index) to start extracting the substring, and if you only pass one argument, it will extract all the way to the end.
ok what do i do next
then you could just do a for loop for each element of your
word variable and do a toUpperCase() to the first letter
how do I select the first letter thought
khaduch @khaduch - now I'm leaving again for the night... happy coding everyone!
function titleCase(str) {
var word = str.split(" ");
for (var i = 0; i < word.length; i++) {
word[i].substring(0,1).toUpperCase();
}
}
your code did not work
You need to return the string
do a .join() on word.
@unlawfulspoonisback @ml3ha is on the way with you, this is how you'll continue.....word is an array, right?
function lookUp(firstName, prop){
// Only change code below this line
for(var i=0;i<contacts.length;i++){
if(contacts[i][firstName] === firstName){
if(contacts[i].hasOwnProperty(prop)){
return contacts[i][prop];
}else{
return "No such property";
}
}
if(i == contacts.length-1){
return "No such contact";
}
}
it does not work too
Oh ok im on the page, looks like theres some edge cases @unlawfulspoonisback
@unlawfulspoonisback you'll use for loop like you did
@fenghuilu
@fenghuilu
if(contacts[i][firstName] === firstName){ should be if(contacts[i]["firstName"] === firstName){
Here, i just did the challenge:
function titleCase(str) {
var splitted = str.split(" ");
for (var i = 0; i < splitted.length; i++) {
splitted[i] = splitted[i].substring(0,1).toUpperCase() + splitted[i].substring(1).toLowerCase();
}
return splitted.join(" ");
}
titleCase("I'm a little tea pot");
passed the test cases
try to understand what im doing there though
@ml3ha try not to give out the answer when helping please
ok
@Lumexralph you sure about that?
how to use func... arr.func doesn't work
my bad
its ok no worries, people won't learn if you just give answers out
then they move on without understanding things they need to know to complete other challenges
Ive been trying if (arr.func ){
here is the challenge
@HeebieGeeBee about what?
['firstName']?
if(i == contacts.length-1){
return "No such contact"; @fenghuilu this is a problem
return "No such contact"; @fenghuilu this is a problem
@HeebieGeeBee either
Object.firstName or Object["firstName"] they are both properties in object
i think its [firstName]
if(contacts[i][firstName] === firstName){ should be if(contacts[i]["firstName"] === firstName){ this works,but i do not understand...
['firstName'] would imply its a string 'firstName' wouldnt it?
firstName already has ""
@HeebieGeeBee he's accessing the
firstName property in contacts to check against firstName parameter
Stuck here. Don't know what to do. Please help.
yeah and firstName is a parameter not a string
isnt it?
var contacts = [
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
},
{
"firstName": "Sherlock",
"lastName": "Holmes",
"number": "0487345643",
"likes": ["Intriguing Cases", "Violin"]
},
{
"firstName": "Kristian",
"lastName": "Vos",
"number": "unknown",
"likes": ["Javascript", "Gaming", "Foxes"]
}
];
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
},
{
"firstName": "Sherlock",
"lastName": "Holmes",
"number": "0487345643",
"likes": ["Intriguing Cases", "Violin"]
},
{
"firstName": "Kristian",
"lastName": "Vos",
"number": "unknown",
"likes": ["Javascript", "Gaming", "Foxes"]
}
];
lookUp("Akira", "likes");
oh ok sorry
its a string
any idea guys
think im getting mixed up with the record one
can someone help me with the "Title Case Sentence"?
@Lumexralph sorry
Need help. Stuck here. Don't know what to do in this exercise.
https://www.freecodecamp.com/challenges/word-blanks#?solution=%0Afunction%20wordBlanks(myNoun%2C%20myAdjective%2C%20myVerb%2C%20myAdverb)%20%7B%0A%20%20var%20result%20%3D%20%22%22%3B%0A%20%20%2F%2F%20Your%20code%20below%20this%20line%0A%20%20%0A%0A%20%20%2F%2F%20Your%20code%20above%20this%20line%0A%20%20return%20result%3B%0A%7D%0A%0A%2F%2F%20Change%20the%20words%20here%20to%20test%20your%20function%0AwordBlanks(%22dog%22%2C%20%22big%22%2C%20%22ran%22%2C%20%22quickly%22)%3B%0A
https://www.freecodecamp.com/challenges/word-blanks#?solution=%0Afunction%20wordBlanks(myNoun%2C%20myAdjective%2C%20myVerb%2C%20myAdverb)%20%7B%0A%20%20var%20result%20%3D%20%22%22%3B%0A%20%20%2F%2F%20Your%20code%20below%20this%20line%0A%20%20%0A%0A%20%20%2F%2F%20Your%20code%20above%20this%20line%0A%20%20return%20result%3B%0A%7D%0A%0A%2F%2F%20Change%20the%20words%20here%20to%20test%20your%20function%0AwordBlanks(%22dog%22%2C%20%22big%22%2C%20%22ran%22%2C%20%22quickly%22)%3B%0A
@fenghuilu when you're done looking through the contacts i.e when the loop is done...just return no such contacts outside the loop.....
firstName already has "" ,why i have to add another "" when iuse it?
@HeebieGeeBee keine Probleme :smile:
can someone help I still dont know what to do on Title Case a Sentence
find the first letter in a word and turn it into an uppercase letter
find the first letter in a word and turn it into an uppercase letter
nothing found
nothing found
@fenghuilu it's the property/key of the object and it's a string
know but I dont gut how I am suppost to do it
thats why its challenging
how do you think you would go about it
what do you think the steps would be
Could someone give me a hand? I don't know why my code isn't working. Perhaps it's completely wrong:
function destroyer(arr) {
var removeOne = arr.arguments([0][1]);
var removeTwo = arr.arguments([0][2]);
arr2 = [];
for(var i = 1; i < arguments.length; i++) {
if(arr[i] === removeOne || arr[i] === removeTwo) {
arr2.push(arr[i]);
}
}
arr = arr2;
return arr;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
what you meant to be doing in the challenge? @monroemann
You will be provided with an initial array (the first argument in the destroyer function), followed by one or more arguments. Remove all elements from the initial array that are of the same value as these arguments. @HeebieGeeBee
so you should be returning [1, 1] here?
so if i use a key which is a string ,i must add another "" with it ? for example ""xxxx""?
Correct. I just changed the equality to !== but still doesn't work: TypeError: arr.arguments is not a function
arguments.length is just gonna be 3
is that what you want?
@fenghuilu I am not sure
@HeebieGeeBee no, I want arguments[0][0].length correct?
possibly yeah
and now youve seen that
@monroemann arr.arguments doesn't exist
is that what you want removeone to really equal?
@khaduch why is this sentance "He has to give me a new name", "me" also return true?
and removetwo
@ooade But I thought it was a function?
@HeebieGeeBee so if i use a key which is a string ,i must add another "" with it ? for example xxx[""xxxx""]?
@monroemann no, it isn't.
@fenghuilu all i saw was that your last if statement was wrong
function switchOfStuff(val) {
var answer = "";
// Only change code below this line
switch(val){
case "a":
return "apple";
break;
case "b":
return "bird";
break;
case "c":
return "cat";
break;
default:
default "stuff";
}
// Only change code above this line
return answer;
}
// Change this value to test
switchOfStuff(1);
Adding a default option in Switch statements. Plz help me to solve this challenge
@ooade So how then does it know what arguments I want it to refer to?
@monroemann maybe you wanted arguments object
@monroemann arguments object grabs all arguments in the braces
@ooade yes, but how to use it? Someone told me it's a function. So confused
@HeebieGeeBee no the right function bellow function lookUp(firstName, prop){
// Only change code below this line
for(var i=0;i<contacts.length;i++){
if(contacts[i]["firstName"] == firstName){
if(contacts[i].hasOwnProperty(prop)){
return contacts[i][prop];
}else{
return "No such property";
}
}
if(i == contacts.length-1){
return "No such contact";
}
}
// Only change code above this line
}
Is this better?
function destroyer(arr) {
var removeOne = arguments[0][1];
var removeTwo = arguments[0][2];
arr2 = [];
for(var i = 1; i < arguments[0][0].length; i++) {
if(arr[i] !== removeOne || arr[i] !== removeTwo) {
arr2.push(arr[i]);
}
}
arr = arr2;
return arr;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
@monroemann console.log(arguments) and see what you get
@HeebieGeeBee ok
arguments[0][1] is gonna be the second element of the array
@HeebieGeeBee yes, that is what I want
why?
@HeebieGeeBee because I want to remove any numbers that match arguments[0][1] or arguments[0][2]
dont you want to be comparing the array objects with arguments[1] and arguments[2]?
@monroemann what you need is the main arr: [1, 2, 3, 1, 2, 3] and the rest arguments: 2, 3
but isn't the main arr found via arguments[0][0]?
@Trupal24
default:
return "stuff";
@HeebieGeeBee yes, correct
@HeebieGeeBee
But what is arguments[1]?
also remember there might be more than just 2 numbers to be comparing it with
console.log(arguments[1]) and see
it should be 2
@HeebieGeeBee I run that command, but don't see anything.
@Trupal24 You weren't supposed to return em directly tho. You were meant to set "stuff" and d rest of em to
answer because you wouldn't be needing a break statement when using return in a switch statement
wheres the code? @monroemann
function destroyer(arr) {
console.log(arguments);
var removeOne = arguments[1];
var removeTwo = arguments[2];
arr2 = [];
for(var i = 1; i < arguments[0].length; i++) {
if(arr[i] !== removeOne || arr[i] !== removeTwo) {
arr2.push(arr[i]);
}
}
arr = arr2;
return arr;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
and what does the console give you?
I don't know how to see the console.
function switchOfStuff(val) {
var answer = "";
// Only change code below this line
switch (val) {
case "a":
answer = "apple";
break;
case "b":
answer ="bird";
break;
case "c":
answer = "cat";
break;
default:
default = "stuff";
}
// Only change code above this line
return answer;
}
// Change this value to test
switchOfStuff(1);
Adding a default option in Switch statements. Plz anyone help me to solve this challenge
f12 if youre using chrome
@HeebieGeeBee
function nextInLine(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(nextInLine(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
@HeebieGeeBee 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
you need to push item into the array and then return the number you shift from the array @jainishpanchal
@ooade
function switchOfStuff(val) {
var answer = "";
// Only change code below this line
switch (val) {
case "a":
return"apple";
break;
case "b":
return"bird";
break;
case "c":
return "cat";
break;
default:
return "stuff";
}
// Only change code above this line
return answer;
}
// Change this value to test
switchOfStuff(1);
Like this?
@Trupal24 yeah
@HeebieGeeBee
Arguments[3]
0
:
Array[2]
1
:
"tree"
2
:
53
callee
:
destroyer(arr)
length
:
3
Symbol(Symbol.iterator)
:
values()
__proto__
:
Object
@ooade ok thanks
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right yeah forgot it was gonna show you all the test arguments too
@HeebieGeeBee I am getting there. This just got me 4 checks. I have just one X:
function destroyer(arr) {
var removeOne = arguments[1];
var removeTwo = arguments[2];
arr2 = [];
for(var i = 0; i < arr.length; i++) {
if(arr[i] !== removeOne && arr[i] !== removeTwo) {
arr2.push(arr[i]);
}
}
arr = arr2;
return arr;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
I changed the || to &&
var singleVal = array.reduce(function(previousVal, currentVal){
return previousVal+currentVal;
});
why arr.length?
singleVal should be equal to the sum of all items in the array variable.
@monroemann the result of calling arguments shows it's an object. it has keys(0, 1, callee, length, Symbol.iterator and prototype)
@ooade @HeebieGeeBee This is the only one not working: destroyer([3, 5, 1, 2, 2], 2, 3, 5) should return [1].
@monroemann cos you're doing em wrong
cus you have more than two things to sort through
@HeebieGeeBee not still working
@HeebieGeeBee Yeah, just realized that.
@HeebieGeeBee Hmmm, now how to fix that...
I have already create removeOne, and removeTwo, but if there are more than two arguments, it won't work
arr.push(item);
return arr.shift();
ok
yeah maybe you should do it in a different way @monroemann what if the array was 50 numbers long and there was 30 numbers to sort through
@monroemann normally, you don't have to list out arguments yourself cos they can add up to 100 arguments, you might wanna loop through arguments; arguments.length to grab the first n values
I need some help with "Return Largest Numers in Arrays" I get a null on one of the "requirements".......
function largestOfFour(arr) {
// You can do this!
var largest = [];
var larger = 0;
for (i=0; i < arr.length; i++){
for (j=0; j < arr[i].length; j++) {
if (arr[i][j] > larger) {
larger = arr[i][j];
largest[i] = arr[i][j];
}
}
}
return largest;
}
@HeebieGeeBee @ooade Yeah, I know. I guess I will work on this tomorrow. I'm very tired now, and hard to concentrate. Thank you for your help. I have copied your last two bits of advice and will try to figure them out tomorrow
monroemann sends brownie points to @heebiegeebee and @ooade :sparkles: :thumbsup: :sparkles:
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@monroemann :+1:
var singleVal = array.reduce(function(previousVal , currentVal){
return previousVal + currentVal;
});
@seanparkin maybe think about doing itn a different way
@hariharanguru83 what values do array contain?
@seanparkin look into the sort() method
@HeebieGeeBee yeah that would make it easier to code. Thank you. I will try that
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@ooade var array = [4,5,6,7,8];
whats the problem with it?
@hariharanguru83 it should work fine
is that all your code?
Error:- singleVal should be equal to the sum of all items in the array variable.
do you want to return singleVal?
yes
well make sure you do then
@hariharanguru83 hope you didnt delete the initialized singleVal value:
0?
Here is the full code
var array = [4,5,6,7,8];
var singleVal = 0;
// Only change code below this line.
var singleVal = array.reduce(function(previousVal , currentVal){
return previousVal + currentVal;
});
singleVal = array;
@hariharanguru83 Haa!!
oh
youve just turned singleVal into array
at the end
@hariharanguru83 remove
singleVal = array; and undeclare singleVal by removing the var keyword
yeah
and return singleVal
@ooade & @HeebieGeeBee thanks
hariharanguru83 sends brownie points to @ooade and @heebiegeebee :sparkles: :thumbsup: :sparkles:
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Hi everyone. I'm trying to figure out how to do:
<div class='class1 class2' id='id1'>Content here</div>
to add on jquery
I think it's something like
add what?
$('.class1 class2' '#id1').append('Content here')
Appending HTML code with a class and id using jquery
just $('#id1').append('content here') will be enough
Would I need another line to add my div classes?
@bvi1994 no
why do you need to?
you only want it to go into id1 right?
So I have a for loop that runs to add div and classes
that I would like to append to my HTML code
sorry dont know what you mean
Does anyone understand what you're supposed to do for 197 in javascript? I don't get what they want the function to do
Basically I want to create a number of objects with all the same divs but unique IDs
you need to give the name not the number of the challenge @kuehlc
I know how to create unique IDs for each of the boxes
Card sequence?
function nextInLine(arr, item) {
// Your code here
nextInline.shift();
nextInLine.unshift(item);
guys i'm stuck
but I need to figure out how to apply the divs to each of the boxes
someone help me with this pls
function nextInLine(arr, item) {
// Your code here
nextInline.shift();
nextInLine.unshift(item);
build a function that takes in a card and then returns whether you bet or hold
push item and return the shift @cesarecaravaggio
@cesarecaravaggio One of variables also has a cap and lower case
I feel like my code should handle that but i keep failing everything
need to show the code @kuehlc
@HeebieGeeBee llike this?
function nextInLine(arr, item) {
// Your code here
item.push();
return shift; // Change
How do I post my code in here?
no arr.push()
@kuehlc Do
<Your code here>
hm
and return arr.shift();
but think about why thats the answer before you move on
sa<your code here>sa without the "s" and "a" @kuehlc
sorry
arr.push(item) @cesarecaravaggio
<function cc(card) {
// Only change code below this line
if (++hand < 5) {
if (card > 1 || card < 7) {
count++;
} else if (card == 10 || card == 'J' || card == 'Q' || card == 'K' || card == 'A') {
count--;
}
} else {
count = 0;
hand = 1;
if (card > 1 || card < 7) {
count++;
} else if (card == 10 || card == 'J' || card == 'Q' || card == 'K' || card == 'A') {
count--;
}
}
if (count > 0) {
return count + " Bet";
} else {
return count + " Hold";
}
// Only change code above this line
}>
...
I suck
well i did it wrong
'<function cc(card) {
// Only change code below this line
if (++hand < 5) {
if (card > 1 || card < 7) {
count++;
} else if (card == 10 || card == 'J' || card == 'Q' || card == 'K' || card == 'A') {
count--;
}
} else {
count = 0;
hand = 1;
if (card > 1 || card < 7) {
count++;
} else if (card == 10 || card == 'J' || card == 'Q' || card == 'K' || card == 'A') {
count--;
}
}
if (count > 0) {
return count + " Bet";
} else {
return count + " Hold";
}
// Only change code above this line
}>'
Nope, that didn't work either
sorry for the accidental spam
yeah that's my main problem. I dont get the wordings that well yet and I know that comes with time and practice but still.
why have you done it twice @kuehlc
what does the .push object do exactly ?
i tried it two different ways
@bvi1994 same here haha keep on practicing though :)
@cesarecaravaggio Well, I mean how to show the code using the 3 `s thing
except it would format automatically even if I try to trick it