JavaScript map, arrow functions & ternary operator: JS Code Battle Tutorials

Today we study the JavaScript array map method, the arrow function syntax and the ternary operator while watching Leonard and Radu battle each other in the first edition of the JS Code Battle Tutorials.

⭐️HackeRacer⭐️

⭐️More Funny Coding⭐️

[Radu]

Do you use any of these? Which one is your favorite? :-)

[abdulbasitsaeed]

Best youtube channel for programming !!!

[Zhentian-wan]

Haha, I am going to code with Radu from now on!
Here is my answer:
const isOdd = (x) => x % 2;
const double = (x) => x * 2;
const half = (x) => x / 2;
const iif = (cond, x, y) => (num) => (cond(num) ? x(num) : y(num));

const oddDoubleEvenHalf = iif(isOdd, double, half);

function halfDouble(input) {
if (!input || !input.length) {
throw Error("input invalid");
}

return input.map(oddDoubleEvenHalf);
}

[riotsquirrelz]

This was both informative and hilarious, thanks 👍

[MrJackferson]

I'm amazed, didn't knew that i could use % to return a boolean. I hope to be as good as you someday :)

[unknown-bxmy]

i dont usually use map function but its absolutely useful🙂

[ketan.pkapale]

You are just amazing man!!
I am planning to cover everything which is there on your channel!!! A big fan!

[Suzza]

Haha nice little tutorial! I've been seeing the map method and arrow function recently and I've started to use them as well. I'm not the biggest fan of reading code with ternary operators, it's somehow not intuitive for me. So, that's something I need to start using more!

P.S. This is Jimi

[laharisengupta]

I always like your !BB videos. This one is very interesting too. Make more such things

[nancyfazal]

Both are good for me. Still, I use arrow functions and map method most of the time :)

[jakobmusic]

WHERE DO YOU COME UP WITH THIS ORIGINAL IDEAS? love it thanks haha

[rishabhgautam]

Radu we want leonard orignal YTchannel , please tell us!!😕♥️♥️♥️♥️

[saltech]

/* I used the imperative way of programming but I will try to make it better*/

function myArr(arr){
let newArr = [];
for (let i = 0; i < arr.length; i++){
if (arr[i] % 2 === 1){
arr[i] = arr[i] * 2;
} else if (arr[i] % 2 === 0){
arr[i] = arr[i] / 2;
}
newArr.push(arr[i]);
}
return newArr;
}
let result = myArr;
console.log(result([2, 3, 8, 6, 1]));