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A String is a final class in Java, and it is immutable, it means that we cannot change the object itself, but we can change the reference to the object. The HTML tags can be removed from a given string by using the following approaches: Using replaceAll() Method Using Pattern and Matcher Using replaceAll() Method We can remove the HTML tags from a given string by using the replaceAll() method. The replaceAll() method accepts two parameters: a "regular expression" and a "replacement string". It replaces all substrings that match the ... Read More
We are required to write a JavaScript program that adds two numbers represented as strings, without using any conversion library or built-in methods. For example, If the input number strings are '11' and '23', the output should be '34'. In JavaScript, a number is considered a string-represented number when the number is enclosed in single quotes ('number') or double quotes ("number"). For example: '123' or "456". If you use the typeof operator on such values, it will return the type as 'string'. Here are a few input and output scenarios that provide a better understanding of the given problem: Scenario ... Read More
Both and "limits.h" are header files in C and C++ that are used to define constants related to data type limits. Header files are usually created with a .h extension and are used to declare functions, variables, and other entities without having a main() function. You can also create custom header files in C and C++. The header file is specific to the C++ language, whereas "limits.h" belongs to the C language. Let's discuss them one by one with the help of a suitable example to understand them and their uses in a program in a better way: ... Read More
In JavaScript, there is no such data structure concept as a Queue like other programming languages. But you can implement a queue in JavaScript using an array object. You can perform all the operations such as push() method to add element at end and shift() to remove first element. The following diagram will give a clear understanding of the queue data structure and its principles (FIFO): A Queue is a linear data structure that follows the FIFO (First In, First Out) principle. In JavaScript, it is used to store and manage elements of similar or different types. Here is ... Read More
Converting a character array to a reader in Java means treating the array as a stream of characters to be read sequentially. Let's quickly learn about character array and its creation in Java: In Java, a character array is an array that holds elements of only char type, and it is also used to store a sequence of characters. Following is the syntax to define a character array in Java: char char_array_name[] = {'char1', 'char2', 'char3'....} or char char_array_name[] = new char[size]; Here, char_array_name: The name of the character array. ... Read More
No, a constructor cannot be synchronized in Java. If you try to use the synchronized keyword before a constructor, it may throw a compile-time error in the IDE. Synchronization is a mechanism used to control the access of multiple threads to any shared resource. When multiple threads access any shared resources, the synchronization prevents data corruption by coordinating access, avoiding race conditions (i.e., occurs when multiple threads concurrently access and modify shared data), and ensuring that operations are performed atomically. The JVM ensures that only one thread can invoke a constructor call at a given point in time. That is ... Read More
No, we cannot define a package after the import statement in Java. The compiler will throw an error if we try to insert a package after the import statement. A package is a group of similar types of classes, interfaces, and sub-packages. To create a class inside a package, declare the package name in the first statement in our program. Important! If you use the package statement in an online compiler, you may still get an error even if it is defined correctly. This is because many online compilers do not support custom package structures. Example In the following example, ... Read More
A default search text is a text that provides suggestions or a hint of what to search for in the search (input) box. Following is an illustration of a search box, where you can observe a default search text "Search your favorite tutorials…" : The above default search text will suggest to visitors that they can search for their favorite tutorial, which they want to read or open on the website. Adding Default Search Text to Search Box Using JavaScript In HTML, the text (i.e., search text) that appears inside a search box or input field before the user ... Read More
Maximum Possible Pair Sum The maximum possible pair sum is a traditional problem in Data Structures and Algorithms (DSA). In this problem, we calculate the sum of two elements (i.e., pairs) in an array such that the resulting sum is the maximum among all possible pair sums. For example, we have an array [1, 2, 3, 4]. The sum of the pair (3, 4) is 7, which is the maximum among all pair sums in the given array. Problem Statement We have given an array named nums[], and our task is to write a JavaScript program to achieve the maximum ... Read More
What is a Narcissistic Number? A number is said to be a Narcissistic number, only if the addition (or sum) of the value of each digit raised to the power of the total number of digits available in the original number is equal to the original number. Examples of narcissistic numbers, such as 153, 1634, 54748, etc. All single-digit numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) are Narcissistic numbers because the power of 1 of any digit will be the digit itself. The following input and output scenarios will help you understand the problem and calculation ... Read More