A simple implementation of a stack in Golang.

stack.go

package main

import (
	"fmt"
)

type Stack struct {
	elements []interface{}
}

func NewStack() *Stack {
	s := new(Stack)
	s.elements = make([]interface{}, 0)
	return s
}

func (s *Stack) Push(e interface{}) *Stack {
	s.elements = append(s.elements, e)
	return s
}

func (s *Stack) Pop() (e interface{}) {
	e, s.elements = s.elements[len(s.elements)-1], s.elements[:len(s.elements)-1]
	return
}

func (s *Stack) Size() int {
	return len(s.elements)
}

func main() {
	s := NewStack()
	s.Push(1).Push(2).Push(3).Push("Hello")

	for s.Size() > 0 {
		fmt.Println(s.Pop())
	}
}