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代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> <span></span> <script> $(function () { var dimensions = { width: 10, height: 15, length: 20 }; dimensions = $.map( dimensions, function( value, index ) { return value * 2; }); $("span").text(dimensions.join(", ")); }) </script> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：