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vinicius5581/custom-with-callback.js

Last active April 13, 2020 04:01
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Array.prototype
Raw
custom-with-callback.js
const numbersArray = [1, 2, 3, 4];
const logTimesTwo = num => console.log(num * 2);
const customForEach = (arr, cb) => {
for (let i = 0; i < arr.length; i++) {
cb(arr[i]);
}
}
customForEach(numbersArray, logTimesTwo);
Raw
custom-without-callback.js
// custom forEach without callback
const numbersArray = [1, 2, 3, 4];
const logTimesTwo = num => console.log(num * 2);
const customForEach = (arr) => {
for (let i = 0; i < arr.length; i++) {
logTimesTwo(arr[i]);
}
}
customForEach(numbersArray);
Raw
log-double.js
const numbersArray = [1, 2, 3, 4];
console.log(numbersArray[0]); // 1
console.log(numbersArray[1]); // 2
console.log(numbersArray[2]); // 3
console.log(numbersArray[3]); // 4
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