1、数组转字符串
    需要将数组元素用某个字符连接成字符串,示例代码如下:

    var a, b; a = new Array(0,1,2,3,4); b = a.join(“-“); //“0-1-2-3-4”

    2、字符串转数组
    实现方法为将字符串按某个字符切割成若干个字符串,并以数组形式返回,示例代码如下:

    var s = “abc,abcd,aaa”; ss = s.split(“,”);// 在每个逗号(,)处进行分解 [“abc”, “abcd”, “aaa”]

    var s1 = “helloworld”;
    ss1 = s1.split(‘’); //[“h”, “e”, “l”, “l”, “o”, “w”, “o”, “r”, “l”, “d”]

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