Array and object in javascript

Array：
新建：var ary = new Array(); 或 var ary = [];增加：ary.push(value);刪除：delete ary[n];遍歷：for ( var i=0 ; i <ary.length ; ++i ) ary[i];
Object:
新建：var obj = new Object(); 或 var obj = {};增加：obj[key] = value; (key為string)刪除：delete obj[key];遍歷：for ( var key in obj ) obj[key];