자바스크립트 queue 구현

우선 전체 코드는 이러하다. class Queue { constructor() { this.elements = {}; this.head = 0; this.tail = 0; } enqueue(element) { this.elements[this.tail] = element; this.tail++; } dequeue() { const item = this.elements[this.head]; delete this.elements[this.head]; this.head++; return item; } peek() { return this.elements[this.head]; } back() { return this.elements[this.tail - 1]; } get length() { return this..