Scala的数组和多维数组的常用操作

package scala07
import scala.collection.mutable.{ArrayBuffer, ListBuffer}
object RunArray {
   def main(args: Array [String]): Unit = {
   //array
   val arrl= new Array[Int] (3)
   val arr2= Array (1, 2d, 31)
   arr2.foreach (printin (_))
   val arr3=Array [Number] (1, 2d, 31)
   arr3.foreach (printin (_))
   arr1 (0) =7
   arr1 (1) =8
   arrl (2) =9
   arrl.foreach (x=>print (x+","))
   val r1= Array.range (1, 5) 
   val r2= Array.range (1,5, 2) 
   val r3= Array.fill (2) ("scala")
   val r4=List ("a", "b").toArray
   val r5=Array.tabulate (3) (n=>n*n)
   r1. foreach(x=>print("r1="+x+","))
   printin()
   r2. foreach(x=>print("r2="+x+","))
   printin ()
   r3.foreach(x=>print("r3="+x+","))
   printin()
   r4.foreach(x→>print("r4="+x+", "))
   printin()
   r5.foreach(x=>print("r5="+x+"，"))
   printin()
   //arraybuffer
   val abl= ArrayBuffer (1,2, 3)
   val ab2= new ArrayBuffer[String] (1)
   ab2 +="a"
   ab2 +="b"
   ab2 +="c"
   ab2 += ("d", "e")
   ab2 ++=Seq("s1", "s2")
   ab2.append("apendl")
   printin(s"before=$ab2")
   ab2 -="b"
   ab2 -=("d", "e", "b" )
   ab2 --=Seg("s1", "s2")
   ab2.remove(0)
   // (a, a1, a4, a2, a3)
   ab2.append("apend4", "apend2", "apend3")
   ab2.remove(1, 3)
   ab2.clear 
   printin(s"after=$ab2")
   val arr7=Array[String]("banana", "apple") 
   val arr8= arr7.filter(x=>x.startsWith ("b"))
   arr8.foreach(x=>print ("arr7="+x+","))
   val marrl=Array".ofDim[String](2, 2) 
   marrl (0) (0) ="a"
   marrl (0) (1) ="b"
   marrl (1) (0) ="c" 
   marrl (1) (1) ="d" 
   for{
     i<- 0 unti1 2
     j‹- 0 until 2
   }
   printin(s"($i, $j) = ${marr1(1)(j)}")
   var marr2=Array(Array (1,2),Array (3,4)) 
   printin(marr2(1)(0)) 
   marr2 ++=Array(Array(5,6)) 
   printin(marr2(2)(1))
  }
}