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js遍历数组的两种方法

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Release： 2016-06-01 09:55:06
Original
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JS数组的遍历方法有两种：

第一种：一般的for循环，例如：

<code>var a = new Array("first", "second", "third") 
for(var i = 0;i </code>
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输出的结果：fitst,second,third

 

第二种：用for...in 这种遍历的方式，例如：

<code>var arr = new Array("first", "second", "third") 
for(var item in arr) {
   document.write(arr[item]+",");
}</code>
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输出的结果：fitst,second,third

 

Related labels：
array foreach array Traverse
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