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Peeking a PriorityQueue means getting the value with the highest priority without removing it. So we can implement the peek function as follows &minusl Examplepeek() { if (isEmpty()) { console.log("Queue Underflow!"); return; } return this.container[this.container.length - 1]; }You can check if this function is working fine using − Examplelet q = new PriorityQueue(4); q.enqueue("Hello", 3); q.enqueue("World", 2); q.enqueue("Foo", 8); console.log(q.peek()); q.display();OutputThis will give the output −{ data: 'Foo', priority: 8 } [ { data: 'World', priority: 2 }, { data: 'Hello', priority: 3 }, { data: 'Foo', priority: 8 } ]As ... Read More
On getting the result of the following, you can find whether a variable is null or undefined. If the result is “false”, it means the variable is null and undefined.Here, the variable results in “True” − var age = 10; if(age) { document.write("True"); } else { document.write("False"); }
ajaxSend() methodThe ajaxSend(callback) method attaches a function to be executed whenever an AJAX request is sent.Here is the description of all the parameters used by this method:callback − The function to execute. The XMLHttpRequest and settings used for that request are passed as arguments to the callback.Assuming we have the following HTML content in result.html file:THIS IS RESULT...ExampleThe following is an example showing the usage of this method:Live Demo The jQuery Example $(document).ready(function() { ... Read More
We can clear the contents just by reassigning the container element to an empty array. For example, clear() { this.container = []; }ExampleYou can check if this function is working fine using − let q = new PriorityQueue(4); q.enqueue("Hello", 3); q.enqueue("World", 2); q.enqueue("Foo", 8); q.display(); q.clear(); q.display();OutputThis will give the output −[ { data: 'World', priority: 2 }, { data: 'Hello', priority: 3 }, { data: 'Foo', priority: 8 } ] [ ]
The cmp() functionThe cmp(x, y) function compares the values of two arguments x and y −cmp(x, y)The return value is −A negative number if x is less than y.Zero if x is equal to y.A positive number if x is greater than y.The built-in cmp() function will typically return only the values -1, 0, or 1. However, there are other places that expect functions with the same calling sequence, and those functions may return other values. It is best to observe only the sign of the result.>>> cmp(2, 8) -1 >>> cmp(6, 6) 0 >>> cmp(4, 1) 1 >>> cmp('stackexchange', ... Read More
ajaxStop() methodThe ajaxStop( callback ) method attaches a function to be executed whenever all AJAX requests have ended.Here is the description of all the parameters used by this method −callback − The function to execute.Assuming we have following HTML content in result.html file:THIS IS RESULT...ExampleThe following is an example showing the usage of this method:Live Demo jQuery ajaxStop() method $(document).ready(function() { /* Global variable */ ... Read More
Here is the complete implementation of the PriorityQueue class −Exampleclass PriorityQueue { constructor(maxSize) { // Set default max size if not provided if (isNaN(maxSize)) { maxSize = 10; } this.maxSize = maxSize; // Init an array that'll contain the queue values. this.container = []; } // Helper function to display all values while developing display() { console.log(this.container); } // Checks if queue is empty isEmpty() { ... Read More
ajaxSuccess() methodThe ajaxSuccess( callback ) method attaches a function to be executed whenever an AJAX request completes successfully. This is an Ajax Event.Here is the description of all the parameters used by this method −callback − The function to execute. The event object, XMLHttpRequest, and settings used for that request are passed as arguments to the callback.Assuming we have the following HTML content in result.html file:THIS IS RESULT...ExampleThe following is an example showing the usage of this method:Live Demo The jQuery Example ... Read More
Following are the basic operations supported by a list.Insertion − add an element at the beginning of the list.Deletion − delete an element at the beginning of the list.Display − displaying the complete list.Search − search an element using given key.Delete − delete an element using given key.
Ajax requests produce a number of different events that you can subscribe to. There are two types of events:Local EventsThese are callbacks that you can subscribe to within the Ajax request object.$.ajax({ beforeSend: function(){ // Handle the beforeSend event }, complete: function(){ // Handle the complete event } // ...... });Global EventsThese events are broadcast to all elements in the DOM, triggering any handlers which may be listening. You can listen for these events like so:$("#loading").bind("ajaxSend", function(){ $(this).show(); }).bind("ajaxComplete", function(){ $(this).hide(); });Global events can be disabled, for a ... Read More