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Counting characters in a string is a common task in programming, especially when analyzing text or creating applications that handle user input. Counting characters in a string without worrying about uppercase or lowercase letters is a common task in text processing and data analysis. JavaScript offers different methods to easily count how many times each character appears, regardless of case. Understanding Case Insensitive Case insensitivity in programming means that a system takes uppercase and lowercase letters as the same. For example, "Hello" and "hello" would be treated as equal in a case-insensitive situation. Case-Insensitive Character Counting You can ... Read More
For converting a Roman numeral into a decimal number, JavaScript provides simple and efficient ways. Roman numerals are a number system that started in ancient Rome and are still used today in different situations. Converting Roman numerals to decimal (integer) values can be useful in many applications, such as date conversions, numbering systems, or educational tools. In this article, we will see a JavaScript algorithm to convert Roman numerals into decimal numbers efficiently. Understanding Roman Numerals Roman numerals are a Number System that uses combinations of letters from the Latin alphabet to represent values. It uses seven letters to ... Read More
Sorting an object in ascending order by the value of a key is a common task in JavaScript. Objects are data structures, which are a collection of key-value pairs. Since objects in JavaScript are unordered collections, sorting them directly is not possible. This article will guide you on how to sort an object in ascending order by the value of a key in JavaScript. Understanding the Concept Suppose we have the following object: const obj = { "sub1": 56, "sub2": 67, "sub3": 98, "sub4": 54, ... Read More
In this article, we will learn to get the size of an ArrayList in Java. In Java, an ArrayList is a resizable array implementation of the List interface. Unlike arrays, which have a fixed length, an ArrayList dynamically grows as elements are added. Using the size() Method The size of an ArrayList can be obtained by using the java.util.ArrayList.size() method as it returns the number of elements in the ArrayList i.e. the size. Syntax int size = arrayList.size(); Getting the Size of an ArrayList Following are the steps to get the size of an ArrayList using the size() method − ... Read More
In this article, we will learn to perform cocktail sorting in Java. Cocktail Sort, also known as Bidirectional Bubble Sort, is a variation of the standard Bubble Sort algorithm. What is Cocktail Sort? Cocktail Sort works in contrast to bubble sort, wherein elements are iterated from left to right, and the largest element is first brought to its correct position, and so on. In cocktail sort, elements are iterated over in both directions (left and right) in an alternating fashion. Cocktail Sort Working Following are the steps to perform cocktail sort in Java − Traverse ... Read More
JavaScript has several built-in methods to create dialog boxes that allow users to interact with them. The prompt() method in JavaScript is one of them. The prompt dialog box is very useful when you want to pop up a text box to get user input. In this article, we'll explore how to use the prompt() method with examples. What is a Prompt Dialog Box? The prompt() method in JavaScript is used to display a dialog box that prompts the user for input. The prompt dialog box is very useful when you want to pop up a text box to ... Read More
In JavaScript, it is common to use a string as a key for an object, especially when you want to dynamically create or change the properties of the object. Objects are fundamental data structures that allow you to store collections of data in key-value pairs. You can use strings as keys directly. It is a simple and straightforward method. This article will guide you how to use a string as a key for an object. Setting a String as a Key for an Object You can set a strings as a key for an object using bracket notation. The ... Read More
Finding specific words in an array is a common task in JavaScript, especially when you need to filter data, search through lists, or analyze text. An array is a simple and fundamental data structure in JavaScript that stores multiple values of the same data type. JavaScript has several built-in methods, like includes(), filter(), and find(), that help you search for specific words easily. This article will explain these methods with examples. Finding Specific Words in an Array Finding specific words in an array can be done in the following ways: Using includes() method Using filter() method Using find() ... Read More
Automatically filling in a field in JavaScript is a common need in web forms, where one field copies the value from another. This feature eliminates the need to write the same information in one or more fields. This is useful in real-life scenarios, such as filling in the forms where the user has entered the permanent address and has to add a temporary address. If both the addresses are the same, using the autofilling feature, he can automatically copy the permanent address into the temporary address. This article explains how to create autofill features in JavaScript. Core Concept: Copying ... Read More
Adding and accessing object methods are common tasks in JavaScript. JavaScript objects are collections of properties and methods, and the JavaScript methods are functions associated with objects. JavaScript provides various features and ways to add and access object methods. In this article, we will understand how to add or access object methods in JavaScript. Understanding JavaScript Object Methods JavaScript methods are functions associated with objects. They allow objects to perform actions, which is important for creating dynamic and interactive programs. Methods in objects are functions that work with the object's properties. This helps make programming more organized and efficient. ... Read More