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Articles on Trending Technologies
Technical articles with clear explanations and examples
C++ Program to Find Fibonacci Numbers using Dynamic Programming
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 MoreAll reverse permutations of an array using STL in C++?
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 MoreHow to sort a Vector in descending order using STL in C++?
The problem is to sort a vector in descending order using C++'s Standard Template Library(STL). Sorting in descending order means rearranging the elements of the vector so that the largest elements come first, followed by smaller elements, all the way down to the smallest element at the end of the vector. Let's say we have the following vector of integers: vector v = {4, 2, 9, 1, 7}; We want to sort this vector so that the elements are arranged in descending order: v = {9, 7, 4, 2, 1}; In this article, we will show you how ...
Read MoreHow to sort an Array using STL in C++?
The problem is to sort an array using C++'s Standard Template Library (STL). Sorting an array means rearranging its elements in a specific order. In this case, we aim to sort the elements in both ascending and descending order, using the built-in functionalities of the STL. Let's say we have the following array of integers: int arr[] = {4, 2, 9, 1, 7}; The goal is to sort this array so that the elements are ordered from smallest to largest (ascending) and largest to smallest (descending): Ascending: arr = {1, 2, 4, 7, 9} Descending: arr = {9, 7, ...
Read MoreHow To Pass GET Parameters To Laravel From With GET Method?
Introduction GET parameters passing in Laravel by forms is used in many web applications. GET parameters are most often used to filter data or even keep a search query after page transitions and to pass some information among pages. Having a good understanding of how to properly pass GET parameters to Laravel forms makes data handling smoother for better user experience.In this tutorial, different ways of passing GET parameters to Laravel forms through the GET method, with some best practices and actual examples, are discussed. Problem Statement The default method of Laravel forms is POST. However, when it comes to ...
Read MoreDifference Between Blob Storage and Data Lake in Azure
Users can store and retrieve data items in the cloud with Microsoft Azure's Azure Storage cloud-based storage solution. It provides a range of storage choices for various data kinds and situations, including files, queues, tables, and blobs. Azure Portal, Azure Storage Explorer, Azure PowerShell, Azure CLI, and the Azure Storage REST API are some of the ways users can access Azure Storage.What is Blob Storage?Blob Storage is a kind of object-based cloud storage intended for unstructured or semi-structured data. Blobs can be accessed by client libraries, REST APIs, or Azure PowerShell and CLI. They are arranged into containers, which resemble ...
Read MoreJava program to pass lambda expression as a method argument
In this article, we will learn to pass a lambda expression as a method argument in Java. A lambda expression is a short block of code that takes in parameters and returns a value. Lambda Expression Lambda expressions allow passing functionality as a method parameter, reducing the need for anonymous classes. They are often used in functional interfaces, especially when working with collections and streams. Problem Statement Given an Arraylist the goal is to reverse the strings present in it. Below is a demonstration of the same − Input ("Apple", "Orange", "Grapes") Output elppA, egnarO, separG Reversing Strings in ...
Read MoreJava ResultSetMetaData getColumnLabel() method with example
In this article, we will learn the ResultSetMetaData getColumnLabel() method in Java. When working with databases in Java, the ResultSetMetaData interface provides valuable information about the structure of a ResultSet, such as column names, types, and properties. What is getColumnLabel()? The getColumnLabel() method of the ResultSetMetaData (interface) retrieves the display name of a particular column. This method accepts an integer value representing the index of the column in the current ResultSet object, as an argument. Syntax − String columnLabel = resultSetMetaData.getColumnLabel(); Parameters: The index of the column (starting from 1). Returns: A ...
Read MoreWhat is the difference between CHAR and NCHAR in MySQL?
In MySQL, both CHAR and NCHAR are ASCII character data types used for storing text data, but they differ significantly in terms of storage, data representation, and performance. CHAR and NCHAR columns can have different collations, determining how strings are compared and sorted. The CHAR type typically uses the collation associated with its specified character set. On the other hand, NCHAR is intended for Unicode data and typically uses a collation that can handle Unicode characters, ensuring proper sorting and comparison. Understanding 'CHAR' in MySQL The CHAR data type is primarily used to store ASCII character data. It is a ...
Read MoreJava program to cube sum of first n natural numbers
In this article, we will learn to write a Java program to calculate the sum of cubes of the first n natural numbers. Understanding the Cube Sum Formula The sum of cubes of the first n natural numbers follows a mathematical formula − S = 13 + 23 + 33 + ... + n3 = { ( n ( n + 1 ) ) / 2 }2 Different Approaches Following are the two different approaches to printing the cube sum of first n natural numbers − Using a Loop Using a ...
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