hello-algo/zh-hant/codes/go/chapter_stack_and_queue/array_stack.go

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// File: array_stack.go
// Created Time: 2022-11-26
// Author: Reanon (793584285@qq.com)
package chapter_stack_and_queue
/* 基於陣列實現的堆疊 */
type arrayStack struct {
data []int // 資料
}
/* 初始化堆疊 */
func newArrayStack() *arrayStack {
return &arrayStack{
// 設定堆疊的長度為 0容量為 16
data: make([]int, 0, 16),
}
}
/* 堆疊的長度 */
func (s *arrayStack) size() int {
return len(s.data)
}
/* 堆疊是否為空 */
func (s *arrayStack) isEmpty() bool {
return s.size() == 0
}
/* 入堆疊 */
func (s *arrayStack) push(v int) {
// 切片會自動擴容
s.data = append(s.data, v)
}
/* 出堆疊 */
func (s *arrayStack) pop() any {
val := s.peek()
s.data = s.data[:len(s.data)-1]
return val
}
/* 獲取堆疊頂元素 */
func (s *arrayStack) peek() any {
if s.isEmpty() {
return nil
}
val := s.data[len(s.data)-1]
return val
}
/* 獲取 Slice 用於列印 */
func (s *arrayStack) toSlice() []int {
return s.data
}