a array.map code example
Example: array map
let numbers = [1, 4, 9]
let roots = numbers.map(function(num) {
return Math.sqrt(num)
})
// roots is now [1, 2, 3]
// numbers is still [1, 4, 9]let numbers = [1, 4, 9]
let roots = numbers.map(function(num) {
return Math.sqrt(num)
})
// roots is now [1, 2, 3]
// numbers is still [1, 4, 9]