Scala中的mkString

Scala中的mkString

1.mkString()方法的使用：

• mkString(seq:String)方法是将原字符串使用特定的字符串seq分割。
• mkString(statrt:String,seq:String,end:String)方法是将原字符串使用特定的字符串seq分割的同时，在原字符串之前添加字符串start，在其后添加字符串end。

object Test {
  def main(args: Array[String]): Unit = {
    var name : String = "Hello LittleLawson"
    var age :Int = 2
    println(name.mkString)
    println(name.mkString(" "))//separate string with space

    var str0 = "scala"
    println(str0.mkString(","))//separate string with comma

    println(str0.mkString("begin",",","end"))

    /*
    1.mkString is used in the inner List,That is say ,Elements in the list is applied.
     */
    val a = List(1,2,3,4)
    val b = new StringBuilder()
    println(a.mkString("List(" , ", " , ")"))

  }
}

执行结果如下：
Hello LittleLawson
H e l l o   L i t t l e L a w s o n
s,c,a,l,a
begins,c,a,l,aend
List(1, 2, 3, 4)

Process finished with exit code 0

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