stack.go

package main

import (
	"fmt"
	"strconv"
)

type Istring interface {
	string(string) string
}

type stack struct {
	sItem []Istring
}
func (s *stack) push(item Istring) {
	
	(*s).sItem = append((*s).sItem, item)
}

func (s *stack) pop() Istring{
	sItems := (*s).sItem
	item := sItems[len(sItems) - 1]
	(*s).sItem = sItems[:len(sItems) - 1]
	return item
}

type String struct{
	content string
}
func (s *String) string(str string) string {
	return str
}
func main() {
	var stk *stack = &stack{sItem: make([]Istring, 0)}
	var str *String
	
	for i := 0; i < 10; i++ {
		func(i int) {
			//fmt.Println(i)
			str = &String{content: strconv.Itoa(i)}
			stk.push(str) 
		}(i) 
	}
	
	var s Istring
	
	for i := 0; i < 10; i++ { 
		s = stk.pop()
		fmt.Println(s.string(s.(*String).content))
	}
	
}