jQuery Map Example

gistfile1.js

var squareNumbers = function (number) {
    return number * number;
};

var numbers = [1,2,3,4];

var squares = $.map(numbers, squareNumbers);

//logs [1,4,9,16]
console.log(squares);

///if you need the index of the element in the array
getAllEvenIndices = function(number, indexInArray){
    if(indexInArray % 2 === 0) return number
}

numbers = [1,2,3,4];

evenIndexedNumbers = $.map(numbers, getAllEvenIndices);

//logs [1,3]
console.log(evenIndexedNumbers);


///Using the native JS array map property might be easier
squares = numbers.map(squareNumbers);
//logs [1,4,9,16]
console.log(squares);

//Unfortunately there is no support for the index in the native JS map
numbers.map(evenIndexedNumbers); //!!Throws a type error