Javascript Articles - Page 380 of 534

The Globally Unique Identifier (GUID) or (Universally Unique Identifier) is a 16-byte or 128- bit binary value that is used as an identifier standard for software construction. This 128-bit number is represented in a human-readable format by using the canonical format of hexadecimal strings. One example is like: de305d84-75c4-431d-acc2-eb6b0e5f6014. In this article, we shall cover how we can use javascript functionality to generate GUID or UUID. There are a few different methods, covered one by one: By using random number generation Example function generate_uuidv4() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { ... Read More

Camel case is the practice of writing phrases such that each word or abbreviation in the middle of the phrase begins with a capital letter, with no intervening spaces or punctuation. For example, Concurrent hash maps in camel case would be written as −ConcurrentHashMapsWe can implement a method to accept a string in JavaScript to convert it to camel case in the following way −Examplefunction camelize(str) {    // Split the string at all space characters    return str.split(' ')       // get rid of any extra spaces using trim       .map(a => a.trim())     ... Read More

In JavaScript, objects are the collection of a key value pairs. The properties of the object are the keys and is denoted with a string. The value of the key is the value of the property of the given object. In JavaScript, the objects can be copied to other by many ways in which some of them are discussed below. Using spread operator(…), Using assign() function and Using JSON.parse() and JSON.stringify() functions. Using the Json.parse() and Stingify() methods Among the above mentioned three ways, for an object to be deep cloned, JSON.stringify() and JSON.parse() functions are used. ... Read More

Java Script Object Notation is one of the many standard formats to store data in different many applications. JavaScript objects can also be stored in a file in this JSON format. In this article, we will cover a few methods to print the JSON objects in a pretty method. Let us see this as an example. We are creating an object in javascript before − Example (Creating Javascript Object)

Javascript asynchronous programming uses a promise object which does not block the execution of the current flow but informs the compiler that there is something that is not completed yet, and whenever it completes it returns a signal to the system. There are mainly two possibilities. Either the promise object will complete successfully, or it will stop by returning an exception. To handle exceptions coming from promise objects the catch() methods are used. In try-catch methods also we can use another block named ‘finally’. This will execute no matter what is done previously. For promises also we can use the ... Read More

Asynchronous programming is fairly common in javascript network programming. In this approach, we can download, or perform some time-dependent jobs without locking thecurrent execution flow. Which performs asynchronously as compared to our program, which can be done using async functions in javascript. In this article, we will discuss the techniques to return the response from an asynchronous call in javascript. Before entering into the concept, let us see in which cases it becomes confusing to developers when asynchronous execution calls are taken into action. Let us see the following situation. Syntax function aTrivialFunction() { ajaxCall(..., function onSuccess(result) ... Read More

Multiple-inheritance is not supported by Javascript by default. But sometimes we need to mix multiple object properties into a single object. Object property sharing can be done using mixins. In this article, we shall cover what are mixins in JavaScript. The definition of mixins can be stated as mixins is a class that contains methods that can be used by other classes without inheriting from that class. The methods in mixin provide certain behavior which is not used alone but can be used to add these behaviors to other classes. Mixin: A Simple Example See the following example where we ... Read More

While writing code, we always try to make our code easier to read, less complex, more efficient, and smaller in size. For that, we follow several methodologies which make our code efficient. In this article, we shall focus on some techniques based on Javascript sets to perform certain array-like or collection-based applications which will run faster and the code will also be concise. Let us focus few use cases. How sets are different than arrays and the benefits of using sets over an array Arrays are indexed collections where each element is associated with a specific index. On the other ... Read More

In JavaScript, to search for an object key in a Set, you need to understand how Sets store values and how objects behave in JavaScript. JavaScript Sets are useful objects that store unique values, making them excellent for handling distinct data. In this article, we'll explore different ways to search for an object key in a Set. JavaScript Set A Set in JavaScript is a collection of unique values. Values like numbers and strings can be compared directly, but objects are stored by reference. This means that even if two objects have the same properties, they are still seen ... Read More

In javascript, we may use some sets to hold a few objects. Sometimes we want to check whether an element is present inside a set or not. In this article, we will see different techniques to check whether an element is inside a given set or not.p> A trivial method using for loop At first, we can search for an element by manually picking an element and checking whether it is the same as the key element or not. If so then simply return true, otherwise after completing all elements return false. Examples HTML ... Read More