array map() method

by Ken Sprague

JavaScript

//array map() method

let heroes = ['Batman', 'Robin', 'Batgirl', 'Wonder Woman', 'Superman', 'Flash', 'Aquaman', 'Swamp Thing'];

//determine the length of each name and save it in an array

let nameLengths = heroes.map(function(item, index, array){
	return item.length;
//return 8;
//return item;
//retunr index;
//return len;

});

console.log(nameLengths);