scala之split（）函数用法

split()函数：

def split(arg0: String): Array[String]

def split(arg0: String, arg1: Int): Array[String]

scala> \"a-b-c-d-e\".split(\"-\

res0: Array[String] = Array(a, b, c-d-e)scala> \"a-b-c-d-e\".split(\"-\

res1: Array[String] = Array(a, b, c, d-e)scala> \"a-b-c-d-e\".split(\"-\

res2: Array[String] = Array(a, b, c, d, e)scala> \"a-b-c-d-e\".split(\"-\

res3: Array[String] = Array(a, b, c, d, e)scala> \"a-b-c-d-e\".split(\"-\")

res6: Array[String] = Array(a, b, c, d, e)scala> \"a-b-c-d--e---\".split(\"-\")

res7: Array[String] = Array(a, b, c, d, \"\

//arg1=0，split函数尽可能多的匹配arg0，不保留处于末尾位置的空字符串,空字符串例外。⽐如：scala> \"--a-b-c-d--e---\".split(\"-\")

res8: Array[String] = Array(\"\scala> \"\".split(\"-\

res1: Array[String] = Array(\"\")

//arg1<0，保留末尾的空字符串scala> \"--a-b-c-d--e---\".split(\"-\

res0: Array[String] = Array(\"\