diff --git a/Data-Structures/Queue/Queue.js b/Data-Structures/Queue/Queue.js
index aaab824cd6..0b80caacef 100644
--- a/Data-Structures/Queue/Queue.js
+++ b/Data-Structures/Queue/Queue.js
@@ -7,7 +7,7 @@
// Functions: enqueue, dequeue, peek, view, length
-var Queue = (function () {
+const Queue = (function () {
// constructor
function Queue () {
// This is the array representation of the queue
@@ -17,7 +17,7 @@ var Queue = (function () {
// methods
// Add a value to the end of the queue
Queue.prototype.enqueue = function (item) {
- this.queue[this.queue.length] = item
+ this.queue.push(item)
}
// Removes the value at the front of the queue
@@ -26,7 +26,7 @@ var Queue = (function () {
throw new Error('Queue is Empty')
}
- var result = this.queue[0]
+ const result = this.queue[0]
this.queue.splice(0, 1) // remove the item at position 0 from the array
return result
@@ -51,7 +51,7 @@ var Queue = (function () {
}())
// Implementation
-var myQueue = new Queue()
+const myQueue = new Queue()
myQueue.enqueue(1)
myQueue.enqueue(5)
@@ -62,17 +62,17 @@ myQueue.enqueue(54)
myQueue.view()
-console.log('Length: ' + myQueue.length())
-console.log('Front item: ' + myQueue.peek())
-console.log('Removed ' + myQueue.dequeue() + ' from front.')
-console.log('New front item: ' + myQueue.peek())
-console.log('Removed ' + myQueue.dequeue() + ' from front.')
-console.log('New front item: ' + myQueue.peek())
+console.log(`Length: ${myQueue.length()}`)
+console.log(`Front item: ${myQueue.peek()}`)
+console.log(`Removed ${myQueue.dequeue()} from front.`)
+console.log(`New front item: ${myQueue.peek()}`)
+console.log(`Removed ${myQueue.dequeue()} from front.`)
+console.log(`New front item: ${myQueue.peek()}`)
myQueue.enqueue(55)
console.log('Inserted 55')
-console.log('New front item: ' + myQueue.peek())
+console.log(`New front item: ${myQueue.peek()}`)
-for (var i = 0; i < 5; i++) {
+for (let i = 0; i < 5; i++) {
myQueue.dequeue()
myQueue.view()
}
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