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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java labelled for loop
Following program is using labeled for loops.ExampleLive Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j< 3; j++){ if(i == 1){ continue first; } System.out.print(" [i = " + i + ", ...
Read MorePeeking elements from a PriorityQueue using JavaScript
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 MoreHow to determine if a variable is 'undefined' or 'null'?
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"); }
Read MoreClearing the elements of the PriorityQueue using Javascript
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 } ] [ ]
Read MoreWhat does the cmp() function do in Python Object Oriented Programming?
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 MoreThe PriorityQueue Class in Javascript
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 MoreBasic Operations supported by a list in Javascript
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.
Read MoreWhat is the difference between Local Events and Global Events in jQuery?
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 MoreCreating a linked list using Javascript
Let's start by defining a simple class with a constructor that initializes the head to null. We'll also define another structure on the prototype of the LinkedList class that'll represent each node in the linked list.Exampleclass LinkedList { constructor() { this.head = null; this.length = 0; } } LinkedList.prototype.Node = class { constructor(data) { this.data = data; this.next = null; } }Let's also create a display function that'll help us see how our list looks like. This function works as follows.It starts from the head.It iterates ...
Read MoreJava labelled statement
Yes. Java supports labeled statements. You can put a label before a for statement and use the break/continue controls to jump to that label. ExampleSee the example below.Live Demopublic class Tester { public static void main(String args[]) { first: for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++){ if(i == 1){ continue first; ...
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