Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Economics & Finance
CSS was invented by Håkon Wium Lie on October 10, 1994, and is maintained by a group of people within the W3C called the CSS Working Group. The CSS Working Group creates documents called specifications. When a specification has been discussed and officially ratified by W3C members, it becomes a recommendation. These ratified specifications are called recommendations because the W3C has no control over the actual implementation of the language. Independent companies and organizations create that software. The CSS Working Group The CSS Working Group consists of representatives from major browser vendors (like Google, Mozilla, Apple, and ... Read More
Bootstrap contextual classes allow you to change the background color of table rows or individual cells to convey different meanings and states. These classes provide visual feedback to users about the status or importance of data. Available Contextual Classes Class Description Visual Effect ... Read More
In JavaScript, you can remove the last digit from a number using different approaches. The most common methods involve string manipulation or mathematical operations like bitwise operations. When working with numbers, you typically need to convert the number to a string to use string methods, or use mathematical operations to avoid type conversion altogether. Method 1: Using String substring() The substring() method extracts characters from a string between two specified indices. Syntax str.substring(startIndex, endIndex) To remove the last digit, use str.substring(0, str.length - 1) where the first parameter is the starting index ... Read More
In JavaScript, you can pass empty parameters to a method by simply omitting them when calling the function. This is useful when working with functions that have default parameters or when you want to rely on the function's default behavior. Understanding Default Parameters Default parameters allow functions to have fallback values when no arguments are provided or when undefined is passed. Passing Empty Parameters body { ... Read More
We have to write a function, say findPositions() that takes in two arrays as argument. And it should return an array of the indices of all the elements of the second array present in the first array. For example − If the first array is ['john', 'doe', 'chris', 'snow', 'john', 'chris'], And the second array is ['john', 'chris'] Then the output should be − [0, 2, 4, 5] Therefore, let's write the code for this function. We will use a forEach() loop here. Example const values = ['michael', ... Read More
We have two arrays of literals that contain some common values, our job is to write a function that returns an array with all those elements from both arrays that are not common. For example − // if the two arrays are: const first = ['cat', 'dog', 'mouse']; const second = ['zebra', 'tiger', 'dog', 'mouse']; // then the output should be: const output = ['cat', 'zebra', 'tiger'] // because these three are the only elements that are not common to both arrays Let's write the code for this − We will spread the two ... Read More
We are required to write a JavaScript function that finds how many times a specific letter is appearing in the sentence using for loop, break, and continue statements. Using continue Statement The continue statement skips the current iteration and moves to the next one. Here's how we can use it to count character occurrences: const string = 'This is just an example string for the program'; const countAppearances = (str, char) => { let count = 0; for(let i = 0; i < str.length; i++){ ... Read More
In JavaScript, methods are object properties that contain functions. Sometimes you need to inspect an object to discover all its available methods. This tutorial shows how to print all methods of an object using different approaches. A method is simply a function stored as an object property. When you call obj.methodName(), you're executing the function stored in that property. JavaScript provides several ways to discover these function properties. Using Object.getOwnPropertyNames() Method The Object.getOwnPropertyNames() method returns an array of all properties (including non-enumerable ones) found directly on an object. We can filter this array to find only function ... Read More
In this tutorial, we will learn how to preselect a select list item using JavaScript. This is useful when you want to set a default selection dynamically based on user preferences or application state. The HTML element creates dropdown menus where users can choose from multiple options. Each element represents a selectable choice. You can preselect options either by adding the selected attribute in HTML or programmatically using JavaScript. Understanding Select Elements A select element consists of: id attribute - Associates with labels for accessibility name attribute - ... Read More
To get the natural logarithm of 2 in JavaScript, use the Math.LN2 property. This built-in constant returns the natural logarithm of 2, which is approximately 0.693. Syntax Math.LN2 Return Value The Math.LN2 property returns a number representing the natural logarithm of 2, approximately 0.6931471805599453. Example Here's how to access the natural logarithm of 2: JavaScript Math LN2 Property ... Read More