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Queue.js
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Queue.js
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class Queue {
constructor(length) {
this.array = new Array(length);
this.F = 0;
this.R = 0;
}
enqueue(val) {
if (this.R === this.array.length) {
this._doubleArray();
}
this.array[this.R] = val;
this.R++;
}
dequeue() {
if (this.array.length === 0) return false;
if (this.array.length === this.F) return;
this.F = this.F + 1;
}
peek() {
return this.array[this.F];
}
isFull() {
if (this.R === this.array.length) return true;
return false;
}
_doubleArray() {
const newArrayLength = this.array.length * 2;
const newArray = new Array(newArrayLength);
for (let i = 0; i < this.array.length; i++) {
newArray[i] = this.array[i];
}
this.array = newArray;
console.log(this.array);
}
}
const queue = new Queue(5);
queue.enqueue(10);
queue.enqueue(20);
queue.enqueue(30);
queue.enqueue(40);
queue.enqueue(50);
queue.enqueue(50);
console.log(queue.isFull());
console.log(queue.peek());
console.log(queue);