ListBuffer、ArrayBuffer、Queue、Stack操作代码实战
import scala.collection.mutable.ListBuffer
val listBuffer = new ListBuffer[Int]
listBuffer += 1
listBuffer += 2
println(listBuffer)
运行情况:
ListBuffer(1, 2)
import scala.collection.mutable.ArrayBuffer
val arrayBuffer = new ArrayBuffer[Int]()
arrayBuffer += 1
arrayBuffer += 2
println(arrayBuffer)
运行情况:
ArrayBuffer(1, 2)
val empty = Queue[Int]()
val queue1 = empty.enqueue(1)
val queue2 = queue1.enqueue(List(2,3,4,5))
println(queue2)
val (element, left) = queue2.dequeue
println(element + " : " + left)
运行情况:
Queue(1, 2, 3, 4, 5)
1 : Queue(2, 3, 4, 5)
import scala.collection.mutable.Queue
val queue = Queue[String]()
queue += "a"
queue ++= List("b", "c")
println(queue)
println(queue.dequeue)
println(queue)
运行情况:
Queue(a, b, c)
a
Queue(b, c)
import scala.collection.mutable.Stack
val stack = new Stack[Int]
stack.push(1)
stack.push(2)
stack.push(3)
println(stack.top)
println(stack)
println(stack.pop)
println(stack)
运行情况:
3
Stack(3, 2, 1)
3
Stack(2, 1)
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