JavaScript Data Structures - Queue

js-da-queue.js

// Implement Queue in JS and store collection as Array ( use Array method for add and remove items )

class Queue {

  constructor() {
     this.collections = [];
  }
  
  enqueue(item) {
    this.collections.push(item);
  }
  
  dequeue() {
     return this.collections.shift();
  }
  
  getFront() {
     return this.collections[0] || undefined;
  }
  
  getSize() {
     return this.collections.length;
  }
  
  isEmpty() {
     return ( this.collection.length === 0 );
  }

}