Array map with one number in JavaScript [duplicate]

Question

I want to create array with one number. Is it possible?

In array = 60, I mean array[1, 2, 3 ...60], but I want this array with one number.

I want something like this.

JavaScript:

let array = 60;
const map1 = array.map(x => console.log(x));

console.log must happen 60 times.

Answer 1

You can use the new Array(60); to make an array of length 60. Then append the fill("") to fill they array with empty strings. After that you can map() the index of each item to its value.

(Be aware that the index is zero based so you need to add one).

let arr = new Array(60).fill("").map((_, i) => i + 1);

arr.forEach(n => console.log(n));

Detailed:

// Create array of length 60
let arr = new Array(60);

// Fill the whole array with a value, i chose empty strings
let filledArr = arr.fill("");

// Replace every value with it's index plus one. Index starts at 0 that's why we add one
let numArr = filledArr.map((_, i) => i + 1);

EDIT: By making it into a function you can call it with dynamic lengths

const makeNumArr = num => new Array(num).fill("").map((_, i) => i + 1);

let fiveArr = makeNumArr(5);
let tenArr = makeNumArr(10);

console.log(fiveArr);
console.log(tenArr);