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有趣的javascript数组定义方法_基础知识

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Release: 2016-05-16 18:19:53
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复制代码 代码如下:

 var Person = new Array();
    Person[0] = 120;//定义人的体重 120斤
    Person[1] = 21;//定义人的年龄 21岁
    document.write(“体重="+Person[0]+"年龄="+Person[1]);//输出人的体重和年龄


另一个有趣的定义数组的方法:  
复制代码 代码如下:

var Person = new Array();
    Person["weight"] = 50;
    Person["age"] = 40;
    document.write("体重="+Person["weight"]+"年龄="+Person["age"]);

以上这种方法称为 “关联数组”,是通过一个特定的值来索引数组的。实际上数值数组可以被当作关联数组的一种特例来对待。

用关联数组来代替数值数组的做法意味着,我们可以通过各元素的名字而不是一个下标数字来引用它们,这样大大提高了脚本的可读性。
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