generics

collections/circlequeue.go

@@ -2,23 +2,23 @@ package collections
 
 import "fmt"
 
-type CircleQueue struct {
+type CircleQueue[T any] struct {
 	data  []any
 	cap   int
 	front int
 	rear  int
 }
 
-func NewCircleQueue(cap int) *CircleQueue {
+func NewCircleQueue[T any](cap int) *CircleQueue[T] {
 	cap++
 
-	return &CircleQueue{
+	return &CircleQueue[T]{
 		data: make([]any, cap),
 		cap:  cap,
 	}
 }
 
-func (q *CircleQueue) Push(data any) bool {
+func (q *CircleQueue[T]) Push(data any) bool {
 	if (q.rear+1)%q.cap == q.front {
 		return false
 	}
@@ -27,7 +27,7 @@ func (q *CircleQueue) Push(data any) bool {
 	q.rear = (q.rear + 1) % q.cap
 	return true
 }
-func (q *CircleQueue) Pop() any {
+func (q *CircleQueue[T]) Pop() any {
 	if q.rear == q.front {
 		return nil
 	}
@@ -38,18 +38,18 @@ func (q *CircleQueue) Pop() any {
 	return data
 }
 
-func (q *CircleQueue) Size() int {
+func (q *CircleQueue[T]) Size() int {
 	return (q.rear - q.front + q.cap) % q.cap
 }
 
-func (q *CircleQueue) IsFull() bool {
+func (q *CircleQueue[T]) IsFull() bool {
 	return (q.rear+1)%q.cap == q.front
 }
 
-func (q *CircleQueue) IsEmpty() bool {
+func (q *CircleQueue[T]) IsEmpty() bool {
 	return q.front == q.rear
 }
 
-func (q *CircleQueue) Show() string {
+func (q *CircleQueue[T]) Show() string {
 	return fmt.Sprintf("%v", q.data)
 }

collections/circlequeue_test.go

@@ -3,7 +3,7 @@ package collections
 import "testing"
 
 func TestCircleQueue(t *testing.T) {
-	q := NewCircleQueue(10)
+	q := NewCircleQueue[string](10)
 
 	t.Log("Size:", q.Size())
 	for i := 0; i < 10; i++ {

collections/list.go

@@ -0,0 +1,13 @@
+package collections
+
+type List[T any] interface {
+	Add(T)
+	Delete(T)
+	Count() int
+	ToSlice() []T
+}
+
+
+type Queue interface{
+	
+}

collections/queue.go

@@ -3,40 +3,40 @@ package collections
 import "sync"
 
 // 数组队列，先进先出
-type ArrayQueue struct {
-	array []any // 底层切片
-	size  int           // 队列的元素数量
-	lock  sync.Mutex    // 为了并发安全使用的锁
+type ArrayQueue[T any] struct {
+	array []T        // 底层切片
+	size  int        // 队列的元素数量
+	lock  sync.Mutex // 为了并发安全使用的锁
 }
 
-func NewArrayQueue[T any]() *ArrayQueue {
-	return &ArrayQueue{}
+func NewArrayQueue[T any]() *ArrayQueue[T] {
+	return &ArrayQueue[T]{}
 }
 
 // 入队
-func (queue *ArrayQueue) Add(v any) {
-	queue.lock.Lock()
-	defer queue.lock.Unlock()
+func (q *ArrayQueue[T]) Add(v T) {
+	q.lock.Lock()
+	defer q.lock.Unlock()
 
 	// 放入切片中，后进的元素放在数组最后面
-	queue.array = append(queue.array, v)
+	q.array = append(q.array, v)
 
 	// 队中元素数量+1
-	queue.size = queue.size + 1
+	q.size = q.size + 1
 }
 
 // 出队
-func (queue *ArrayQueue) Remove() any {
-	queue.lock.Lock()
-	defer queue.lock.Unlock()
+func (q *ArrayQueue[T]) Remove() any {
+	q.lock.Lock()
+	defer q.lock.Unlock()
 
 	// 队中元素已空
-	if queue.size == 0 {
+	if q.size == 0 {
 		panic("empty")
 	}
 
 	// 队列最前面元素
-	v := queue.array[0]
+	v := q.array[0]
 
 	/*    直接原位移动，但缩容后继的空间不会被释放
 	      for i := 1; i < queue.size; i++ {
@@ -48,24 +48,24 @@ func (queue *ArrayQueue) Remove() any {
 	*/
 
 	// 创建新的数组，移动次数过多
-	newArray := make([]any, queue.size-1)
-	for i := 1; i < queue.size; i++ {
+	newArray := make([]T, q.size-1)
+	for i := 1; i < q.size; i++ {
 		// 从老数组的第一位开始进行数据移动
-		newArray[i-1] = queue.array[i]
+		newArray[i-1] = q.array[i]
 	}
-	queue.array = newArray
+	q.array = newArray
 
 	// 队中元素数量-1
-	queue.size = queue.size - 1
+	q.size = q.size - 1
 	return v
 }
 
 // 栈大小
-func (queue *ArrayQueue) Size() int {
-	return queue.size
+func (q *ArrayQueue[T]) Size() int {
+	return q.size
 }
 
 // 栈是否为空
-func (queue *ArrayQueue) IsEmpty() bool {
-	return queue.size == 0
+func (q *ArrayQueue[T]) IsEmpty() bool {
+	return q.size == 0
 }

collections/stack.go

@@ -2,72 +2,79 @@ package collections
 
 import "sync"
 
-type ArrayStack struct {
-	array []any      // 底层切片
+var _ Stack[string] = &ArrayStack[string]{}
+
+type Stack[T any] interface {
+	Push(T)
+	Pop() T
+}
+
+type ArrayStack[T any] struct {
+	array []T        // 底层切片
 	size  int        // 栈的元素数量
 	lock  sync.Mutex // 为了并发安全使用的锁
 }
 
-func NewArrayStack[T any]() *ArrayStack {
-	return &ArrayStack{}
+func NewArrayStack[T any]() *ArrayStack[T] {
+	return &ArrayStack[T]{}
 }
 
 // 入栈
-func (stack *ArrayStack) Push(v any) {
-	stack.lock.Lock()
-	defer stack.lock.Unlock()
+func (s *ArrayStack[T]) Push(v T) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
 
 	// 放入切片中，后进的元素放在数组最后面
-	stack.array = append(stack.array, v)
+	s.array = append(s.array, v)
 
 	// 栈中元素数量+1
-	stack.size = stack.size + 1
+	s.size = s.size + 1
 }
 
-func (stack *ArrayStack) Pop() any {
-	stack.lock.Lock()
-	defer stack.lock.Unlock()
+func (s *ArrayStack[T]) Pop() T {
+	s.lock.Lock()
+	defer s.lock.Unlock()
 
-	if stack.size == 0 {
+	if s.size == 0 {
 		panic("empty")
 	}
 
 	// 栈顶元素
-	v := stack.array[stack.size-1]
+	v := s.array[s.size-1]
 
 	// 切片收缩，但可能占用空间越来越大
 	//stack.array = stack.array[0 : stack.size-1]
 
 	// 创建新的数组，空间占用不会越来越大，但可能移动元素次数过多
-	newArray := make([]any, stack.size-1, stack.size-1)
-	for i := 0; i < stack.size-1; i++ {
-		newArray[i] = stack.array[i]
+	newArray := make([]T, s.size-1, s.size-1)
+	for i := 0; i < s.size-1; i++ {
+		newArray[i] = s.array[i]
 	}
-	stack.array = newArray
+	s.array = newArray
 
 	// 栈中元素数量-1
-	stack.size = stack.size - 1
+	s.size = s.size - 1
 	return v
 }
 
 // 获取栈顶元素
-func (stack *ArrayStack) Peek() any {
+func (s *ArrayStack[T]) Peek() T {
 	// 栈中元素已空
-	if stack.size == 0 {
+	if s.size == 0 {
 		panic("empty")
 	}
 
 	// 栈顶元素值
-	v := stack.array[stack.size-1]
+	v := s.array[s.size-1]
 	return v
 }
 
 // 栈大小
-func (stack *ArrayStack) Size() int {
-	return stack.size
+func (s *ArrayStack[T]) Size() int {
+	return s.size
 }
 
 // 栈是否为空
-func (stack *ArrayStack) IsEmpty() bool {
-	return stack.size == 0
+func (s *ArrayStack[T]) IsEmpty() bool {
+	return s.size == 0
 }

collections/stack_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 func TestStack(t *testing.T) {
-	arrayStack := new(collections.ArrayStack)
+	arrayStack := collections.NewArrayStack[string]()
 	arrayStack.Push("cat")
 	arrayStack.Push("dog")
 	arrayStack.Push("hen")
@@ -19,6 +19,6 @@ func TestStack(t *testing.T) {
 	arrayStack.Push("drag")
 	t.Log("pop:", arrayStack.Pop())
 	arrayStack.Push("test")
-	s := arrayStack.Pop().(string)
+	s := arrayStack.Pop()
 	t.Log(s)
 }