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Javascript Articles
Page 5 of 534
JavaScript Remove non-duplicate characters from string
Non-duplicate characters in a string are those that appear only once and do not repeat within the string, and the strings are a data type that represents a sequence of characters or text. Sometimes in JavaScript, we need to work with strings and manipulate them based on certain conditions. One of the common tasks is to remove characters that only appear once in a string so that we keep only the characters that appear more than once. In this article, we will understand how to remove non-duplicate characters from a string in JavaScript. Understanding the Problem Suppose we have ...
Read MoreRemoving all non-alphabetic characters from a string in JavaScript
Non-alphabetic characters are any characters that are not part of the alphabet, and the strings are a data type that represents a sequence of characters or text. Working with strings is a basic task in JavaScript, and one common task is removing all non-alphabetic characters from a string. In this article, we will understand how to remove all non-alphabetic characters from a string. Understanding the Problem Suppose we have a string saying "he@656llo wor?ld". We want to remove all digits, punctuation, whitespace, and special characters from the given string. For example: Input string we have: "he@656llo wor?ld" ...
Read MoreJavaScript Program to Find Area and Perimeter of Rectangle
To find the area and perimeter of a rectangle in JavaScript, we will be using the basic formulas for the perimeter and area of a rectangle. The area of a rectangle is the multiplication of its length by its breadth, and the perimeter of a rectangle is the sum of the lengths of all its four sides. In this article, we are going to understand the formula for the area and perimeter of a rectangle, how to find them using JavaScript, and implement practical examples for this. Understanding the Formulas The formulas for the area and perimeter of a ...
Read MoreHow to create an array of integers in JavaScript?
In this article, we will learn to create an array of integers in JavaScript. The Array parameter is a list of strings or integers. When you specify a single numeric parameter with the Array constructor, you specify the initial length of the array. The maximum length allowed for an array is 4, 294, 967, 295. Different Approaches The following are the two different approaches to creating an array of integers in JavaScript − Using Array Literals Using the Array Constructor Using Array Literals One of the simplest ways to create ...
Read MoreSet JavaScript object values to null?
Setting object values to null can help reset data, free up memory, or show that a value is no longer needed. In JavaScript, the null value is used to indicate that there is an intentional absence of any object value. This article provides various methods for setting JavaScript object values to null and what that means. Setting an Object's values to null Setting object values to null can be done in two types: For Specific Object Value For Multiple Object Value For Specific Object Value Setting the specific ...
Read MoreSpread operator in function calls JavaScript
The spread operator in function calls enhances the function parameter handling. The spread operator allows you to expand an array or any iterable across zero or more arguments in a function call. This article will guide you on using the spread operator in a function call. The spread operator is a powerful feature of JavaScript that allows one to perform operations for complex and lengthy code in a simple single line of code. The spread operator is denoted by the (...) (triple dot) symbol. Syntax The basic syntax of spread operator for function calls is mentioned below: functionName(...iterableObject) ...
Read MoreWhy is isNaN(null) == false in JS?
The isNaN() function in JavaScript is used to check whether a given value is NaN. This function converts the argument to a number first, then checks if it's NaN. When you pass null to isNaN(), it returns false, which can be surprising. This happens because of JavaScript type coercion when using isNaN(). In this article, we will understand why isNaN returns false for null. Understanding isNaN and Type Coercion in Js Before moving forward in this article you need to understand the following key concepts of this article: isNaN in Js: The isNaN() function ...
Read MoreJavaScript Program to Find Perimeter of a Triangle
The perimeter of a triangle is the sum of the lengths of its three sides. You can find the perimeter of a triangle using JavaScript by finding the sum of all sides of the triangle, as the perimeter of the triangle refers to the sum of all three sides of the triangle, i.e., perimeter = a + b + c. To find the perimeter of a triangle using JavaScript, we need to write a function that calculates the sum of three sides of a triangle and returns the triangle's perimeter as an output. In this article, we will understand the ...
Read MoreWhat is the difference between a method and a function?
In this article, we will learn about the difference between a method and a function in Javascript. Method and a function are the same, with different terms. A method is a procedure or function in object-oriented programming. What is a Function? A function is a group of reusable code that can be called anywhere in your program. This removes the necessity to repeat the same code over and over, assisting developers in writing modular code. JavaScript functions can be defined in a number of ways, such as function expressions, arrow functions, or the function keyword. The following is the syntax ...
Read MoreWhat are some JavaScript Development Tools?
One of the major strengths of JavaScript is that it does not require any expensive development tools. You can start with a simple text editor such as Notepad. Since it is an interpreted language inside the context of a web browser, you don't even need to buy a compiler. To make our lives simpler, various vendors have come up with very nice JavaScript editing tools. Some of them are listed here − Code Editors and IDEs A quality code editor is the backbone of any JavaScript development process. Visual Studio Code (VS Code) is a ...
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