map trhough array code example

Example 1: map a property from array of objects javascript

var result = objArray.map(function(a) {return a.foo;});

Example 2: 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]