created stack using Generics

.gitignore

@@ -0,0 +1 @@
+datastructures

go.mod

@@ -0,0 +1,3 @@
+module datastructures
+
+go 1.25.8

stack.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+type Stack[T any] struct {
+	capasity  int
+	container []T
+}
+
+func (s *Stack[T]) push(value T) {
+	if s.capasity > 0 && (len(s.container) >= s.capasity) {
+		panic("Error max capasity exeded")
+	}
+
+	s.container = append(s.container, value)
+}
+
+func (s *Stack[T]) pop() (T, error) {
+
+	var zero T
+
+	if len(s.container) <= 0 {
+		return zero, errors.New("Empty Stack")
+	}
+
+	last := s.container[len(s.container)-1]
+	s.container = s.container[:len(s.container)-1]
+
+	return last, nil
+}
+
+func (s *Stack[T]) clear() {
+	s.container = []T{}
+}
+
+func (s *Stack[T]) peek() T {
+
+	return s.container[len(s.container)-1]
+}
+
+func (s *Stack[T]) first() T {
+
+	return s.container[0]
+}
+
+func StackFixed[T any](value int) *Stack[T] {
+
+	return &Stack[T]{
+		capasity:  value,
+		container: make([]T, 0, value),
+	}
+
+}
+
+func (s *Stack[T]) setSize(value int) {
+	s.capasity = value
+}
+
+func main() {
+
+	testFixedStack()
+
+}
+
+func testFixedStack() {
+
+	fixedStack := StackFixed[int](3)
+
+	fixedStack.push(1)
+	fixedStack.push(2)
+	fixedStack.push(3)
+	fixedStack.pop()
+	fixedStack.push(4)
+	// fixedStack.push(5)
+	// fixedStack.push(6)
+
+	fmt.Printf("fixedStack: %v\n", fixedStack.container)
+}
+
+func testStack() {
+
+	que := Stack[int]{}
+
+	que.container = append(que.container, 1, 2, 4, 5)
+
+	fmt.Printf("%v\n", que.container)
+	que.push(6)
+
+	x, y := que.pop()
+	fmt.Printf("%v %v\n", x, y)
+
+	fmt.Printf("%v\n", que.container)
+	fmt.Printf("after pop %v\n", que.container)
+
+	que.clear()
+	fmt.Printf("ceared: %v\n", que.container)
+
+	que.push(7)
+	que.push(8)
+	que.push(9)
+	que.push(10)
+
+	fmt.Printf("peek: %v\n", que.peek())
+	fmt.Printf("first: %v\n", que.first())
+
+	words := Stack[string]{}
+
+	words.push("a")
+	words.push("b")
+	words.push("c")
+	words.push("e")
+
+	fmt.Printf("words: %v\n", words)
+}