Map Method in JavaScript Arrays
In this JavaScript Tutorial, we will go over the Map method of JavaScript. Map will create and return a new array as a result, after it applies a function to every value in an array. The following example iterates over the calling array and returns the resulting array that has all the values doubled. This method does not change the initial array.
var myArray = [4, 6, 5, 9, 8];
var result = myArray.map(function(value,index,array){
return value * 2;
});
document.write(result);