turn array of strings into numbers javascript code example

Example 1: javascript Convert an array of strings to numbers

const toNumbers = arr => arr.map(Number);
toNumbers(['1', '2', '3','4']);     // [1, 2, 3, 4]

Example 2: convert array to number

let x = [1,2,3,4,5]
let num = +x.join("")

Example 3: javascript to number

parseInt("1")