FreeCodeCamp/HelpFrontEnd

Get help on our Front End Development projects.

markclynch

@markclynch

I looked at Javascript briefly, but thought nah that's for losers who can't code for realz

Bjorn

@bjorno43

Well if you know C++, todays languages should be quite the breeze, haha

markclynch

@markclynch

I "knew" it sorta, theoretically.

I never used it a day in my life, learned it in Comp Scie

then got into finance instead

They are easier to learn.

but I'm not sure they're tougher to master

Bjorn

@bjorno43

Oh ok. I only did C++ once. I was running a private World of Warcraft server and that was made in C++. So I started messing around with that

Next gigi hadid💁

@1Droka_twitter

WHAT i completed 11 of 1408 coding challenges :ok_woman:

markclynch

@markclynch

I'd like to re-learn C++ at some point and help my cryptocurrency's main dev doing stuff, but it's gonna take a lot

Bjorn

@bjorno43

@1Droka_twitter There you go :smile: Brace yourself though. It'll get progressively harder

markclynch

@markclynch

yeah, it'll start getting really annoying, get used to coming to this chat room :)

Bjorn

@bjorno43

I've dropped C++ after that. Picked up C# and finished my master in software engineering with it last year

markclynch

@markclynch

@bjorno43 You like C# that much better?

Bjorn

@bjorno43

@markclynch It's a lot easier than C++ and OOP. So ye, I definitely prefer it

AlbertoGiambone

@AlbertoGiambone

const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];
const squareList = (arr) => {
"use strict";
function inter (int) {
return int.isInteger;
};
const squaredIntegers = realNumberArray.filter(inter);

I don't know why this don't return an array of Int...
someone can help me?

alpox

@alpox

@AlbertoGiambone You forgot the () to call the function isInteger --> int.isInteger()

AlbertoGiambone

@AlbertoGiambone

if I put () this is the message: int.isInteger is not a function. (In 'int.isInteger()', 'int.isInteger' is undefined)

@alpox if I put () this is the message: int.isInteger is not a function. (In 'int.isInteger()', 'int.isInteger' is undefined)

alpox

@alpox

@AlbertoGiambone Right, i'm still half asleep it seems :D

AlbertoGiambone

@AlbertoGiambone

@alpox ;)

alpox

@alpox

The function is Number.isInteger(int)

The function isInteger exists only on the Number constructor

See https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger

AlbertoGiambone

@AlbertoGiambone

@alpox ok, now this is the output: squaredIntegers should be [16, 1764, 36]

alpox

@alpox

Until now your output should be [4, 42, 6]

You still have to square them

Mandeep Sharma

@mandeephub

Can any one tell how to test web app

AlbertoGiambone

@AlbertoGiambone

@alpox ok, I wrote this:
function inter (int) {
return Number.isInteger();
};
const squaredIntegers = Math.pow(realNumberArray.filter(inter), 2);
but off course is not working ;)

alpox

@alpox

@AlbertoGiambone Yea you cannot set an array to the power of 2 :D

You have to target each number

So what you are looking for is the method .map

AlbertoGiambone

@AlbertoGiambone

@alpox thanks!

alpox

@alpox

@AlbertoGiambone np

hellhound123

@hellhound123

Hey guys, I'm trying to get radio buttons working on my survey form, but my input labels seem to be affected by my focus selectors that I used before. How can I get them to be below the title? I don't really want to use a <p> or heading element, or is that the only way? Here's the pen: https://codepen.io/Pixel123/pen/NzByep

AlbertoGiambone

@AlbertoGiambone

I need to square one array, I try to use " const squaredIntegers = a.map(Math.pow(a, 2));
"
but is non working..

Aditya

@ezioda004

@AlbertoGiambone .map() takes a callback function, so it should be const squaredIntegers = a.map(val => Math.pow(val, 2));

AlbertoGiambone

@AlbertoGiambone

@ezioda004 this don't return the square of the array

Aditya

@ezioda004

@AlbertoGiambone Seems to be working

const a = [2, 3, 4];
const squaredIntegers = a.map(val => Math.pow(val, 2));
console.log(squaredIntegers) // [4, 9, 16]

AlbertoGiambone

@AlbertoGiambone

@ezioda004 ahhh ok,
but in FCC don't
const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];
const squareList = (arr) => {
"use strict";
// change code below this line
function inter (int) {
return Number.isInteger();
};
const a = realNumberArray.filter(inter);
const squaredIntegers = a.map(val => Math.pow(val, 2));
// change code above this line
return squaredIntegers;
};

Moisés Man

@moigithub

@AlbertoGiambone seems like isInteger function missing something
which value u testing ?

AlbertoGiambone

@AlbertoGiambone

@moigithub const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];

Moisés Man

@moigithub

function inter (int) {
   return Number.isInteger();  /// u not passing anything to that function
};
const a = realNumberArray.filter(inter);

u can check syntaxis /examples here
http://mdn.io/isinteger
https://www.w3schools.com/jsref/jsref_isinteger.asp

AlbertoGiambone

@AlbertoGiambone

@moigithub 16:39

const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];
const squareList = (arr) => {
"use strict";

function inter (int) {
return Number.isInteger(realNumberArray);
};
const a = realNumberArray.filter(inter);
const squaredIntegers = a.map(val => Math.pow(val, 2));

return squaredIntegers;
};
now yes, but it's still the same
now

Aditya

@ezioda004

@AlbertoGiambone Number.isInteger(realNumberArray); the argument passed is..wrong. The usage of isInteger is Number.isInteger(num) so for example

Number.isInteger(1.2) //false
Number.isInteger(3) //true

You're passing array instead, also you should look up documentation of .filter() and what parameters the callback function takes.

AlbertoGiambone

@AlbertoGiambone

@ezioda004 ahhh ok thank's

German Gamboa Gonzalez

@germangamboa95

@padunk Yeah those have been giving my a hard time. I am going to throw CSS grid in there instead of using Materialize's grid since it still uses floats and that might be the cause of that.

@developer4eto thanks

Pixxel123

@Pixxel123

Still struggling with my earlier pen, is there any way to only select certain <labels>? I've tried putting all the ones I want to have the same effect in a class, but it's still affecting a few that I don't want to be affected

Pixxel123

@Pixxel123

I've figured it out, just had to add different classes to them, and change the focus selector to the relevant class instead of pointing at the label tag!

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