underscorePractise1.js

(function() {
	_.each([2, 5, 8], function(num) {
		//console.log(num); // 2 , 5, 8
	});

	var x = _.map([2, 5, 8], function(num) {
		return num * 2;
	})
	//console.log(x); // [4, 10, 16]

	var log = function(x){console.log(x)}

	// each by pure JS
	var ary = [2, 5, 8];
	for(var i = 0; i < ary.length; i++) {
		console.log(ary[i]);
	}

	//map by pure JS
	var ary = [2, 5, 8];
	for(var i = 0; i < ary.length; i++) {
		ary[i] *= 2;
	}
	console.log(ary);

})();