scala入门初级代码训练-03数组的操作
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原文地址： http://www.ptbird.cn/2016/07/19/scala-chuji-demo-03/
There I am,in the world more exciting!
by postbird
03数组的操作
package com.ptbird.scala
import scala.collection.mutable.ArrayBuffer
/**
* Created by postbird on 2016/5/24.
*/
object ArrayTest {
def main(args: Array[String]): Unit = {
val a = new Array[Int](10)
val b = new Array[String](10)
val c = Array("AAAA","bb")
//println(c(1))
//for( elem <- c) println(elem)
//for( i <- 0 until c.length) println(c(i))
val d= ArrayBuffer[String]()
//增加值
d+="Hell"
//在某个位置插入值
d.insert(1,"aaa","ccc","ccc","ccc","ccc")
//移除值 从2开始移除2个
d.remove(2,1)
//println(d)
//数组的遍历
for(i<-1 until d.length){
//println(d(i))
}
//使用yield保存数据
val e =Array(2,3,4,5)
val result = for(i<-e) yield i+1
//println(result(1))
//通过filter循环bianli
e.filter(_ % 2==0).map(2 *_)
//计算
println(e.sum)
//排序
e.sorted
for(i <- e) println("--"+i)
//调用包里面的
scala.util.Sorting.quickSort(e)
for(i <- e) println("-"+i)
//max
println(e.max)
//字符串的拼接
// val s:String = e.mkString(" + ")//2 + 3 + 4 + 5
val s:String = e.mkString("<",",",">") //<2,3,4,5>
println(s)
}
}
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