JavaScript spilt()方法

定义和用法

split() 方法用于把一个字符串分割成字符串数组。

stringObject.split(separator,howmany)

参数

stringObject：要被分解的 String 对象或文字。

separator：从该参数指定的地方分割 stringObject。

howmany:该值用来限制返回数组中的元素个数。

 

返回值

一个字符串数组。该数组是通过在 separator 指定的边界处将字符串 stringObject 分割成子串创建的。返回的数组中的字串不包括 separator 自身。

 

 

注释：如果把空字符串 ("") 用作 separator，那么 stringObject 中的每个字符之间都会被分割。

 

举例：

1、

var str="I like to eat grapes"

str.split(" ") //将返回[" I" ," like" ," to" ," eat" ," grapes" ]
str.split("") //将返回[" I" ," l" ," i" ," k" ," e" ," t" ," o" ," e" ," a" ," t" ," g" ," r" ," a" ," p" ," e" ," s" ]
str.split(" ",3)//将返回[" I" ," like" ," to" ]

 2、

"2:3:4:5".split(":")	//将返回["2", "3", "4", "5"]
"|a|b|c".split("|")	//将返回["", "a", "b", "c"]

 3、若只需要返回一部分字符，请使用 howmany 参数：

"hello".split("", 3)	//可返回 ["h", "e", "l"]