JavaScript

The hasOwnProperty() method in JavaScript allows you to determine whether an object has a specific property. It is useful when you need to check if an object instance has a property with a particular name. Syntax The hasOwnProperty() method is called on an object instance and takes a string argument. It follows the syntax: object.hasOwnProperty(property) Return Value If the object instance has a property with the name specified in the string argument, the method returns true....

In JavaScript, the filter() function is an essential method for arrays. It allows you to create a new array by filtering out elements from an existing array based on a specified condition. To use filter(), you simply call it on the array and pass in a function as an argument. This function will be executed for each element in the array, and only the elements that fulfill the condition specified in the function will be included in the new filtered array....

The map() function in JavaScript is a crucial method when it comes to programming in a functional manner. An example of using the map() function involves iterating through an array, applying a specified function (f()) to each element, and building a new array with the results: const b = a.map(f); Using map(), we can create a new array from an existing array, and then further filter the result using the filter() function....

In JavaScript, the new operator plays a crucial role in creating new objects. By using the new operator, you can instantiate objects from a class or constructor function. To create a new object with the new operator, you need to specify the class or constructor function followed by the new keyword. For example: const date = new Date(); If the constructor function requires parameters, you can pass them in the parentheses....

In this blog post, we will dive into the details of the charAt() method in JavaScript. This method allows us to retrieve a specific character from a string based on its index. Basic Usage The syntax for using the charAt() method is string.charAt(index), where string is the string we want to extract the character from, and index is the position of the character we want to retrieve. Let’s consider a few examples to understand the charAt() method better:...

Discover the fundamentals of how the delete operator works in JavaScript The delete operator in JavaScript is specifically designed to remove a property from an object. Let’s consider an example with an object named car: const car = { model: 'Fiesta', color: 'green' } To delete a property or method from this object, you can employ the delete operator like this: delete car.model Alternatively, you can utilize the brackets syntax to specify the property or method to be removed:...

The JavaScript Event Loop is a crucial concept to understand when working with JavaScript. In this blog post, we will delve into the details of how the event loop works and how JavaScript handles asynchronous functions. Introduction The Event Loop is an integral aspect of JavaScript. If you have been programming with JavaScript for a while, you might not have a deep understanding of how things work under the hood. However, it is always beneficial to have a basic understanding of how the Event Loop operates....

Let’s dive into the fundamentals of the JavaScript instanceof operator, which is used to determine if an object is an instance of a specific class or its ancestor in the prototype chain. In the following example, we have an object called myCar, which is an instance of the Fiesta class. The instanceof operator allows us to check if myCar is an instance of Fiesta or Car (since Fiesta extends Car)....

In JavaScript, the padStart() method is used to add characters to the beginning of a string in order to reach a desired length. This can be useful when you want to ensure that a string has a specific number of characters. The syntax for using padStart() is as follows: padStart(targetLength [, padString]) The targetLength parameter represents the desired length of the string after padding, while the optional padString parameter is used to specify the characters to be added....

Learn all about the codePointAt() method in JavaScript for strings. The codePointAt() method was introduced in ES2015 to handle Unicode characters that cannot be represented by a single 16-bit Unicode unit, but require two instead. Unlike the charCodeAt() method, which retrieves the first and second 16-bit parts separately and then combines them, the codePointAt() method allows you to obtain the entire character with a single call. Let’s take a Chinese character “𠮷” as an example....