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Converting array to phone number string in JavaScript
Problem
We are required to write a JavaScript function that takes in an array of exactly 10 positive integers, arr, as the first and the only argument.
Our function should then return a string which is in the format of a phone number string.
For example, if the input to the function is −
Input
const arr = [9, 8, 7, 6, 5, 4, 3, 2, 1, 0];
Output
const output = '(987) 654-3210';
Example
Following is the code −
const arr = [9, 8, 7, 6, 5, 4, 3, 2, 1, 0];
const createNumber = (arr = []) => {
let res = '';
arr = arr.map(String);
res += `(${arr[0]+arr[1]+arr[2]}) `;
res += `${arr[3] + arr[4] + arr[5]}-`;
res += arr[6] + arr[7] + arr[8] + arr[9];
return res;
};
console.log(createNumber(arr));Output
(987) 654-3210
Updated on: 22-Apr-2021
1K+ Views
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