SuperStonne的专栏

object-created //1.factory pattern to create object, using this pattern we can not determine the type of the instance, it is just a instance of Object var person1 = null; var pe

object-extend var instance1 = null; var instance2 = null; /* //1.extend from prototype chain, using this pattern there is a problem when there is a refrence type

block-level-scope for(var i = 0; i < 10; i++){ } alert(i); (function(){ for(var j = 0; i < 10; i++){ } })(); //alert(j);//ReferenceError: j is