class Queue {
    constructor() {
    this.store = [];
    }

    size() {
        return this.store.length
    }

    enqueue(node) {
        this.store.push(node);
    }

    dequeue() {
        if (this.size() > 0) {
            return this.store.shift();
        }
    } 
}

module.exports = Queue;