容器

collections/circlequeue.go

@@ -0,0 +1,55 @@
+package collections
+
+import "fmt"
+
+type CircleQueue struct {
+	data  []interface{}
+	cap   int
+	front int
+	rear  int
+}
+
+func NewCircleQueue(cap int) *CircleQueue {
+	cap++
+
+	return &CircleQueue{
+		data: make([]interface{}, cap),
+		cap:  cap,
+	}
+}
+
+func (q *CircleQueue) Push(data interface{}) bool {
+	if (q.rear+1)%q.cap == q.front {
+		return false
+	}
+
+	q.data[q.rear] = data
+	q.rear = (q.rear + 1) % q.cap
+	return true
+}
+func (q *CircleQueue) Pop() interface{} {
+	if q.rear == q.front {
+		return nil
+	}
+
+	data := q.data[q.front]
+	q.data[q.front] = nil
+	q.front = (q.front + 1) % q.cap
+	return data
+}
+
+func (q *CircleQueue) Size() int {
+	return (q.rear - q.front + q.cap) % q.cap
+}
+
+func (q *CircleQueue) IsFull() bool {
+	return (q.rear+1)%q.cap == q.front
+}
+
+func (q *CircleQueue) IsEmpty() bool {
+	return q.front == q.rear
+}
+
+func (q *CircleQueue) Show() string {
+	return fmt.Sprintf("%v", q.data)
+}