Queue & Stack
Add Queue and Stack, implemented with a resizing array
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
|
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* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
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* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.datastructures.queue
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import arrow.core.Option
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interface Queue<T> {
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fun enqueue(elem: T)
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fun dequeue(): Option<T>
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fun isEmpty(): Boolean
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fun size(): Int
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fun clean()
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fun <A> map(transform: (T) -> A): Queue<A>
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fun forEach(action: (T) -> Unit)
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}
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@ -0,0 +1,133 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
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* in the Software without restriction, including without limitation the rights
|
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.datastructures.queue
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import arrow.core.None
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import arrow.core.Option
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import arrow.core.toOption
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class ResizingArrayQueue<T>(capacity: Int = DEFAULT_CAPACITY) : Queue<T> {
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private var queue: Array<T?> = arrayOfNulls<Any>(capacity) as Array<T?>
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private var size = 0
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private var tail = 0
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private var head = 0
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override fun isEmpty(): Boolean = size == 0
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private fun isFull(): Boolean = queue.size == size
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override fun size(): Int = size
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override fun enqueue(elem: T) {
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if (isFull())
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resizeArray(size * RESIZE_FACTOR)
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queue[tail] = elem
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tail = (tail + 1) % queue.size
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size++
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}
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override fun dequeue(): Option<T> {
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if (isEmpty())
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return None
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val elem = queue[head]
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queue[head] = null
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head = (head + 1) % queue.size
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size--
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if (isOneQuarterFull())
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resizeArray(queue.size / RESIZE_FACTOR)
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return elem.toOption()
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}
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private fun resizeArray(capacity: Int) {
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val copy: Array<T?> = arrayOfNulls<Any>(capacity) as Array<T?>
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when {
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head >= tail -> {
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for (i in head until queue.size)
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copy[i - head] = queue[i]
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val alreadyInsert = queue.size - head
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for (i in 0 until tail)
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copy[i + alreadyInsert] = queue[i]
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}
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else ->
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for (i in head until tail)
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copy[i - head] = queue[i]
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}
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queue = copy
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head = 0
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tail = size
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}
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private fun isOneQuarterFull(): Boolean = size == queue.size / 4 &&
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size > 0
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override fun forEach(action: (T) -> Unit) {
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for (elem in queue)
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if (elem != null)
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action(elem)
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}
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override fun <A> map(transform: (T) -> A): Queue<A> {
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val transformedQueue: Array<A?> = arrayOfNulls<Any>(queue.size) as Array<A?>
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for (i in 0 until queue.size) {
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val elem = queue[i]
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if (elem == null)
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transformedQueue[i] = null
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else
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transformedQueue[i] = transform(elem)
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}
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return ResizingArrayQueue(transformedQueue, head, tail, size)
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}
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override fun clean() {
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queue = arrayOfNulls<Any>(DEFAULT_CAPACITY) as Array<T?>
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size = 0
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tail = 0
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head = 0
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}
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private constructor(queue: Array<T?>, head: Int, tail: Int, size: Int) : this() {
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this.queue = queue
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this.head = head
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this.tail = tail
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this.size = size
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}
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companion object {
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const val RESIZE_FACTOR = 2
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const val DEFAULT_CAPACITY = 2
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}
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}
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@ -0,0 +1,111 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
|
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.datastructures.stack
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import arrow.core.None
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import arrow.core.Option
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import arrow.core.toOption
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class ResizingArrayStack<T>(capacity: Int = DEFAULT_CAPACITY) : Stack<T> {
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private var stack: Array<T?> = arrayOfNulls<Any>(capacity) as Array<T?>
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private var size = 0
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override fun isEmpty(): Boolean = size == 0
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private fun isFull(): Boolean = size == stack.size
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override fun size(): Int = size
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override fun peek(): Option<T> = if (size == 0)
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None
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else
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stack[size - 1].toOption()
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override fun pop(): Option<T> {
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val elem = peek()
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if (elem is None)
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return elem
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stack[--size] = null
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if (isOneQuarterFull())
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resizeArray(stack.size / RESIZE_FACTOR)
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return elem
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}
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override fun push(elem: T) {
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if (isFull())
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resizeArray(size * RESIZE_FACTOR)
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stack[size++] = elem
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}
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private fun resizeArray(capacity: Int) {
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stack = stack.copyOf(capacity)
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}
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private fun isOneQuarterFull(): Boolean {
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return size > 0 &&
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size == stack.size / 4
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}
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override fun forEach(action: (T) -> Unit) {
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for (elem in stack)
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if (elem != null)
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action(elem)
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}
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override fun <A> map(transform: (T) -> A): Stack<A> {
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val transformedStack: Array<A?> = arrayOfNulls<Any>(stack.size) as Array<A?>
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for (i in 0 until stack.size) {
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val elem = stack[i]
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if (elem == null)
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transformedStack[i] = null
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else
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transformedStack[i] = transform(elem)
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}
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return ResizingArrayStack(transformedStack, size)
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}
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override fun clean() {
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stack = arrayOfNulls<Any>(DEFAULT_CAPACITY) as Array<T?>
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size = 0
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}
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private constructor(stack: Array<T?>, size: Int) : this() {
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this.stack = stack
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this.size = size
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}
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companion object {
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const val RESIZE_FACTOR = 2
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const val DEFAULT_CAPACITY = 2
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}
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}
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@ -0,0 +1,39 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
|
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
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* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.datastructures.stack
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import arrow.core.Option
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interface Stack<T> {
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fun push(elem: T)
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fun pop(): Option<T>
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fun peek(): Option<T>
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fun size(): Int
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fun isEmpty(): Boolean
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fun clean()
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fun <A> map(transform: (T) -> A): Stack<A>
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fun forEach(action: (T) -> Unit)
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}
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@ -0,0 +1,75 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
|
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
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*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
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* copies or substantial portions of the Software.
|
||||
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.datastructures.queue
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import org.koin.dsl.module.module
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import org.koin.standalone.KoinComponent
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import org.koin.standalone.StandAloneContext.startKoin
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import org.koin.standalone.inject
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import java.io.PrintStream
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import kotlin.random.Random
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import kotlin.system.measureNanoTime
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fun main(args: Array<String>) {
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startKoin(listOf(queueModule))
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val outEnqueueData = PrintStream(args[0])
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val outEnDeQueueData = PrintStream(args[1])
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TimeMeasure().run(outEnqueueData, outEnDeQueueData)
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}
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val queueModule = module {
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single { ResizingArrayQueue<Int>() as Queue<Int> }
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}
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class TimeMeasure : KoinComponent {
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private val queue: Queue<Int> by inject()
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fun run(outEnqueueData: PrintStream, outEnDeQueueData: PrintStream) {
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(0..100000).map {
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measureNanoTime {
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queue.enqueue(1)
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}
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}.forEach {
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outEnqueueData.println(it)
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}
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val random = Random(System.currentTimeMillis())
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queue.clean()
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(0..100000).map {
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measureNanoTime {
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if (random.nextBoolean())
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queue.enqueue(1)
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else
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queue.dequeue()
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}
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}.forEach {
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outEnDeQueueData.println(it)
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}
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}
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}
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@ -0,0 +1,139 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
|
||||
*
|
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
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* SOFTWARE.
|
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*
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*/
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package it.norangeb.algorithms.datastructures.queue
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import arrow.core.None
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import arrow.core.getOrElse
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import org.amshove.kluent.`should be equal to`
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import org.junit.jupiter.api.Test
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class ResizingArrayQueueTest {
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@Test
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fun testEnqueue() {
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val queue = ResizingArrayQueue<Int>()
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queue.size() `should be equal to` 0
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queue.enqueue(1)
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queue.size() `should be equal to` 1
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queue.enqueue(1)
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queue.size() `should be equal to` 2
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}
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@Test
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fun testIsEmpty() {
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val queue = ResizingArrayQueue<Int>()
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queue.isEmpty() `should be equal to` true
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queue.enqueue(1)
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queue.isEmpty() `should be equal to` false
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}
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@Test
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fun testDequeue() {
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val queue = ResizingArrayQueue<Int>()
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queue.size() `should be equal to` 0
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(queue.dequeue() is None) `should be equal to` true
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queue.enqueue(1)
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queue.dequeue().getOrElse { 0 } `should be equal to` 1
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queue.size() `should be equal to` 0
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}
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@Test
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fun testIncreaseSize() {
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val queue = ResizingArrayQueue<Int>()
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queue.enqueue(1)
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queue.enqueue(2)
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queue.enqueue(3)
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queue.enqueue(4)
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queue.enqueue(5)
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}
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@Test
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fun testDecreaseSize() {
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val queue = ResizingArrayQueue<Int>()
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queue.enqueue(1)
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queue.enqueue(2)
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queue.enqueue(3)
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queue.enqueue(4)
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queue.enqueue(5)
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queue.dequeue()
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queue.dequeue()
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queue.dequeue()
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queue.dequeue()
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queue.dequeue()
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}
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@Test
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fun testMap() {
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val queue = ResizingArrayQueue<Int>()
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queue.enqueue(1)
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queue.enqueue(2)
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queue.enqueue(3)
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queue.enqueue(4)
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queue.enqueue(5)
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val newQueue = queue.map { it * 2 } as ResizingArrayQueue
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newQueue.size() `should be equal to` 5
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newQueue.dequeue().getOrElse { 0 } `should be equal to` 2
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newQueue.dequeue().getOrElse { 0 } `should be equal to` 4
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newQueue.dequeue().getOrElse { 0 } `should be equal to` 6
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newQueue.dequeue().getOrElse { 0 } `should be equal to` 8
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newQueue.dequeue().getOrElse { 0 } `should be equal to` 10
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}
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@Test
|
||||
fun testForEach() {
|
||||
val queue = ResizingArrayQueue<Int>()
|
||||
|
||||
queue.enqueue(1)
|
||||
queue.enqueue(2)
|
||||
queue.enqueue(3)
|
||||
queue.enqueue(4)
|
||||
queue.enqueue(5)
|
||||
|
||||
var x = 0
|
||||
queue.forEach { x++ }
|
||||
|
||||
x `should be equal to` 5
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testClean() {
|
||||
val queue = ResizingArrayQueue<Int>()
|
||||
|
||||
queue.enqueue(1)
|
||||
queue.enqueue(2)
|
||||
queue.clean()
|
||||
|
||||
queue.size() `should be equal to` 0
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,75 @@
|
||||
/*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2019 norangebit
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*
|
||||
*/
|
||||
|
||||
package it.norangeb.algorithms.datastructures.stack
|
||||
|
||||
import org.koin.dsl.module.module
|
||||
import org.koin.standalone.KoinComponent
|
||||
import org.koin.standalone.inject
|
||||
import org.koin.standalone.StandAloneContext.startKoin
|
||||
import java.io.PrintStream
|
||||
import kotlin.random.Random
|
||||
import kotlin.system.measureNanoTime
|
||||
|
||||
fun main(args: Array<String>) {
|
||||
startKoin(listOf(stackModule))
|
||||
|
||||
val outPushData = PrintStream(args[0])
|
||||
val outPushPopData = PrintStream(args[1])
|
||||
|
||||
MeasureTime().run(outPushData, outPushPopData)
|
||||
}
|
||||
|
||||
val stackModule = module {
|
||||
single { ResizingArrayStack<Int>() as Stack<Int> }
|
||||
}
|
||||
|
||||
class MeasureTime : KoinComponent {
|
||||
private val stack: Stack<Int> by inject()
|
||||
|
||||
fun run(outPushData: PrintStream, outPushPopData: PrintStream) {
|
||||
(0..100000).map {
|
||||
measureNanoTime {
|
||||
stack.push(1)
|
||||
}
|
||||
}.forEach {
|
||||
outPushData.println(it)
|
||||
}
|
||||
|
||||
val random = Random(System.currentTimeMillis())
|
||||
stack.clean()
|
||||
|
||||
(0..100000).map {
|
||||
measureNanoTime {
|
||||
if (random.nextBoolean())
|
||||
stack.push(1)
|
||||
else
|
||||
stack.pop()
|
||||
}
|
||||
}.forEach {
|
||||
outPushPopData.println(it)
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,147 @@
|
||||
/*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2019 norangebit
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*
|
||||
*/
|
||||
|
||||
package it.norangeb.algorithms.datastructures.stack
|
||||
|
||||
import arrow.core.None
|
||||
import arrow.core.getOrElse
|
||||
import org.amshove.kluent.`should be equal to`
|
||||
import org.junit.jupiter.api.Test
|
||||
|
||||
class ResizingArrayStackTest {
|
||||
|
||||
@Test
|
||||
fun testPush() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.size() `should be equal to` 0
|
||||
stack.push(1)
|
||||
stack.size() `should be equal to` 1
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testIsEmpty() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.isEmpty() `should be equal to` true
|
||||
stack.push(1)
|
||||
stack.isEmpty() `should be equal to` false
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testPeek() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
(stack.peek() is None) `should be equal to` true
|
||||
stack.push(1)
|
||||
(stack.peek().getOrElse { 0 }) `should be equal to` 1
|
||||
stack.size() `should be equal to` 1
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testPop() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
(stack.pop() is None) `should be equal to` true
|
||||
stack.push(1)
|
||||
(stack.pop().getOrElse { 0 }) `should be equal to` 1
|
||||
stack.size() `should be equal to` 0
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testIncrease() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.push(1)
|
||||
stack.push(2)
|
||||
stack.push(3)
|
||||
stack.push(4)
|
||||
stack.push(5)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testDescrese() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.push(1)
|
||||
stack.push(2)
|
||||
stack.push(3)
|
||||
stack.push(4)
|
||||
stack.push(5)
|
||||
|
||||
stack.pop()
|
||||
stack.pop()
|
||||
stack.pop()
|
||||
stack.pop()
|
||||
stack.pop()
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMap() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.push(1)
|
||||
stack.push(2)
|
||||
stack.push(3)
|
||||
stack.push(4)
|
||||
stack.push(5)
|
||||
|
||||
val newStack = stack.map { it * 2 } as ResizingArrayStack
|
||||
|
||||
newStack.size() `should be equal to` 5
|
||||
newStack.pop().getOrElse { 0 } `should be equal to` 10
|
||||
newStack.pop().getOrElse { 0 } `should be equal to` 8
|
||||
newStack.pop().getOrElse { 0 } `should be equal to` 6
|
||||
newStack.pop().getOrElse { 0 } `should be equal to` 4
|
||||
newStack.pop().getOrElse { 0 } `should be equal to` 2
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testForEach() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.push(1)
|
||||
stack.push(2)
|
||||
stack.push(3)
|
||||
stack.push(4)
|
||||
stack.push(5)
|
||||
|
||||
var x = 0
|
||||
stack.forEach { x++ }
|
||||
|
||||
x `should be equal to` 5
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testClean() {
|
||||
val stack = ResizingArrayStack<Int>()
|
||||
|
||||
stack.push(1)
|
||||
stack.push(2)
|
||||
stack.clean()
|
||||
|
||||
stack.size() `should be equal to` 0
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user