chapter03

import scala.collection.mutable.ArrayBuffer
 
/**
  * Created by EX-CHENZECHAO001 on 2018-03-29.
  */
class Chapter03 {
 
}
 
object Chapter03 {
 
  // 3.5 常用算法
  val arr35 = Array(1, 8, 3, 5, 7)
  val arrb35 = ArrayBuffer(1, 6, 4, 5)
  arr35.sum
  arrb35.sum
  arr35.min
  arr35.max
  arr35.length
  arr35.sorted // 不修改原数组
  scala.util.Sorting.quickSort(arr35) // 修改原数组
  arrb35.sorted
  arrb35.sortWith(_ > _)
  arr35.mkString("|")
  arr35.count(x => x > 0)
 
  // 3.7 多维数组
  val matrix = Array.ofDim[String](3,4) // 三行四列
//  matrix(row)(column) = 42
  val triangle = new Array[Array[Int]](10)
  for(i <- 0 until triangle.length){
    triangle(i) = new Array[Int](i + 1)
  }
 
  // 3.8 与Java的互操作
  import scala.collection.JavaConversions.bufferAsJavaList
  import scala.collection.mutable.ArrayBuffer
  val command = ArrayBuffer("ls", "-al", "/home/")
  val pb = new ProcessBuilder(command)
 
  import scala.collection.JavaConversions.asScalaBuffer
  import scala.collection.mutable.Buffer
  val cmd:Buffer[String] = pb.command()
 
}