How to add prefix to array values?

Question

I have an array of values to which I want to add some prefix:

var arr = ["1.jpg", "2.jpg", "some.jpg"];

Adding

Answer 1

Use Array.prototype.map():

const newArr = arr.map(i => 'images/' + i)

Same thing but without using ES6 syntax:

var arr = arr.map(function (i){
    return 'images/' + i;
})