var demoArr = [‘Javascript‘, ‘Gulp‘, ‘CSS3‘, ‘Grunt‘, ‘jQuery‘, ‘angular‘];
var demoObj = {
aaa: ‘Javascript‘,
bbb: ‘Gulp‘,
ccc: ‘CSS3‘,
ddd: ‘Grunt‘,
eee: ‘jQuery‘
};
1.Object.keys(demoObj) //[‘aaa‘,‘bbb‘,‘ccc‘,‘ddd‘,‘eee‘];
2.$.each(demoArr, function(e, ele) { console.log(e, ele);})0 "Javascript"1 "Gulp"2 "CSS3"3 "Grunt"4 "jQuery"原文：http://www.cnblogs.com/zhuanshen/p/7156661.html