Open qiuhongbingo opened 4 years ago
class Queue { constructor(...args) { this.queue = [...args] } enqueue(...items) { return this.queue.push(...items) } dequeue() { return this.queue.shift() } front() { return this.isEmpty() ? undefined : this.queue[0] } back() { return this.isEmpty() ? undefined : this.queue[this.size() - 1] } isEmpty() { return this.size() == 0 } size() { return this.queue.length } }