Scala当中mkString()方法的使用

1）mkString()方法的使用：

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package com
object Test
{
  def main(args: Array[String]): Unit = {
  var name : String = "Hello mark-to-win"
  var tmp=""
/*def mkString(sep: String): String
Displays all elements of this string in a string using a separator string.
 */ 
  tmp=name.mkString(" ")
  println("name.mkString(\" \") is "+tmp)
  tmp=name.mkString(",")
  println("name.mkString(\",\") is "+tmp)
/*def mkString(start: String, sep: String, end: String): String
Displays all elements of this string in a string using start, end, and separator strings.
 * */ 
  tmp=name.mkString("begin",",","end")
  println("name.mkString(\"begin\",\",\",\"end\") is "+tmp)
  val aList = List(1,4,3,7,5)
/*def mkString(sep: String): String
Displays all elements of this list in a string using a separator string.
*/ 
  tmp=aList.mkString(",")
  println(tmp)
  }
}

 

更多请看下节：https://blog.youkuaiyun.com/qq_44596980/article/details/93307614