js模拟简单的函数重载
<div id="cnblogs_post_body"><div class="cnblogs_code"><div class="cnblogs_Highlighter"><div class="cnblogs_code">function addNum() { if(arguments.length == 1) { var num = arguments * 2; }else if(arguments.length == 2) { var num = (arguments + arguments) * 2; } alert(num); }addNum(100);addNum(100,100);//ps:主要是以参数个数来判断应该执行哪段代码。
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