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Composer is a dependency management tool for PHP that is widely used in PHP projects to manage and install libraries. At times, you may need to force Composer to reinstall a library to ensure it has the latest version or to fix any corrupted or missing files. Below is a step-by-step guide on how to do this. Steps to Force Reinstallation Composer doesn't have a built-in "reinstall" command, but you can achieve reinstallation using the following methods: Method 1: Remove and Reinstall the Library Remove the Library The simplest way to reinstall a library is to first remove ... Read More
JavaScript is a case-sensitive language. This means that the language keywords, variables, function names, and any other identifiers must always be typed with a consistent capitalization of letters. So the identifiers Time and TIME will convey different meanings in JavaScript. What Does Case-Sensitive Mean in JavaScript? Case sensitivity in programming refers to whether a language distinguishes between uppercase and lowercase letters. For example − myVariable and myvariable are treated as two different identifiers. function and Function are not the same (the former is a keyword, while the latter could be a user-defined ... Read More
In this article, we will learn to convert string to date in Java. In Java, dates are provided as strings, and it becomes necessary to convert these strings into Date objects for further processing. Problem Statement The goal is to convert the date strings in various formats into Date or LocalDateTime objects. Input − String date1 ="11/10/2018"; String date2 = "15-Mar-2019 21:11:35"; Output − Thu Oct 11 00:00:00 UTC 2018 Fri Mar 15 21:11:35 UTC 2019 Different Approaches The following are the two different approaches to converting string to date in Java − Using SimpleDateFormat ... Read More
In this article, we will learn the difference between JavaScript undefined and void(0). Though they may appear similar, they serve distinct purposes and can be used in different scenarios. What is JavaScript undefined? undefined means a variable declared, but no value has been assigned. It is a primitive value automatically assigned to variables that have been declared but not initialized. For Example − var demo; alert(demo); //shows undefined alert(type of demo); //shows undefined It is a global property that represents a variable with no assigned value. If a function does not return ... Read More
In this article, we will learn the LinkedHashMap and LinkedHashSet in Java. LinkedHashMap Hash table and linked list implementation of the Map interface, with predictable iteration order. Example Let us see an example − import java.util.*; public class Demo { public static void main(String args[]){ LinkedHashMap my_set; my_set = new LinkedHashMap(); my_set.put(67, "Joe"); my_set.put(90, "Dev"); my_set.put(null, "Nate"); my_set.put(68, "Sara"); ... Read More
In this article, we will explain how to delete an element from a set in C++ by passing its value. A set stores elements in sorted order, where each element is unique and cannot be modified once added. While the values cannot be changed, we can add or remove elements using the erase() function from the C++ Standard Library (STL). For example, if we have a set of integers: {1, 2, 3, 4, 5} and want to remove the element 3, we can use the erase() function. After the operation, the set will be {1, 2, 4, 5}, ... Read More
In this article, we'll discuss how to call the main() function in a C program. The main() function is the starting point and runs automatically when the program begins. However, there may be situations where you need to call it from other parts of your code. We'll explain how this works. We'll also cover recursion in the main() function and different ways to call main() within a C program. What is the Main Function? In C, the main() function is a special function that acts as the starting point of the program. Every C program must have one main ... Read More
In this article, we will learn how to calculate Fibonacci numbers efficiently using dynamic programming in C++. The Fibonacci sequence starts with 0 and 1, and each next number is the sum of the two preceding ones. The basic recursive method works but becomes very slow for larger numbers because it repeats the same calculations many times. Dynamic programming solves this by storing the results of previous calculations, which makes the process much faster and more efficient. For example, if we want to find the 6th Fibonacci number, the sequence will look like this: F(0) = 0 ... Read More
In this problem, we need to generate all reverse permutations of a given array using C++'s Standard Template Library (STL). A permutation is simply rearranging the elements of the array in every possible order. For example, with an array of three elements, there are six possible ways to arrange them. For each of these permutations, we need to reverse the order of the elements and then print the results. The goal is to first generate all possible permutations of the array, then reverse each one before displaying them. Example Scenario: Let's say we have the array {1, 2, 3}. ... Read More
In this article, we will learn how to print prime numbers from 1 to N in reverse order. A prime number is a number greater than 1 that has no positive divisors other than 1 and itself. Our goal is to find all prime numbers in the given range from 1 to N and then print them in reverse order. For example, given N = 20, the prime numbers between 1 and 20 are: 2, 3, 5, 7, 11, 13, 17, 19 The output should be the prime numbers printed in reverse order: 19, 17, 13, 11, 7, 5, ... Read More