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When we work with database tables, we need to insert multiple rows into database tables. We can improve the efficiency of SQL queries if we use an efficient method to insert multiple rows into database tables. We can reduce the number of queries sent to the server. We will discuss different methods and their advantages for inserting multiple rows into database tables. You can select your best method depending on your data and your choice. We should follow practices when we insert data into database tables - We should prepare statements for dynamic data to ... Read More
Pythagorean Triples Pythagorean triples are a set of three distinct numbers a, b, and c which satisfy the condition: a2 + b2 = c2 These numbers a, b, and c are known as Pythagorean triples. We can say that these three numbers represent the sides of a right-angled triangle. These three sides are known as triplets of the array. Problem Description We are given an array of integers, and we have to find if there exist three distinct numbers in the array which form the Pythagorean triplet in C++. Below are examples to demonstrate the problem statement clearly: ... Read More
Package Managers is a tool used to install and update software easily in Windows. There are different tools that we need to use daily while working as software engineers. A package manager is used to install, update, manage, and uninstall software and applications. It simplifies the process, saves time, and ensures consistency. It operates through a command-line interface (CLI) which allows us to execute tasks like installing or updating software with a single command. It handles everything in the background, including dependencies. It improves security by preventing malicious software from downloading and installing all applications from official and trustworthy sources. ... Read More
What are Environment Variables?Environment variables are essential for managing sensitive information, such as API keys or database credentials, in a secure and maintainable way. Environment variables are key-value pairs used to configure applications without hardcoding sensitive or environment-specific information into the codebase. They are especially useful for:Storing Sensitive Information: Protect API keys, tokens, and passwords from being exposed in the code.Environment-Specific Configuration: Configure values that vary between development, staging, and production environments.Improved Security: Keep sensitive data out of version control systems like Git.Why Use Environment Variables in Vercel?Vercel provides a simple and secure way to manage environment variables. It supports ... Read More
React is a powerful JavaScript library developed by Facebook for creating user interfaces specifically for single-page applications. The component-based architecture allows developers to create reusable UI components. This makes the development process efficient and maintainable. A typical React application is structured in directories and files. There are different file extensions used in React development, each with a particular purpose. For instance .js or .jsx files are for JavaScript and JSX code, respectively. On the other hand, .css files are for formatting elements. Knowing these file extensions is crucial for several reasons: improves code readability; helps fix bugs and ensures ... Read More
Tables are a common way to organize and display data in HTML. If you're working with tables dynamically in JavaScript, you might need to count the rows in an HTML table for various purposes, such as validation, manipulation, or displaying statistics. In this article, we will demonstrate how to retrieve the row count of an HTML table using JavaScript. We will use the rows Attribute to access the row count through rows.length, while in the other method, we will specifically count the rows through tbody selection. What is rows Attribute? The rows attribute in HTML is used to define the ... Read More
Stack is a linear data structure, that allows elements to be added and removed in a last-in, first-out(LIFO). The main operations are − Push Pop Display The Push Operation A stack adds a new item on top. A stack overflow occurs when the stack is full and cannot specify more items. Given below is an algorithm for Push() − Check for stack overflow. if (top = = n-1) printf("stack over flow"); Otherwise, insert an element into the stack. top ++ a[top] = item The ... Read More
The difference between a Null pointer and a Void pointer is that a Null pointer represents a value, while a Void pointer is a type identifier. NULL Pointer A null pointer indicates that it does not point to anything. If a pointer has no assigned address, it should be set to null. Each pointer type, such as int* or char*, can have a null pointer value. The syntax is as follows − * = NULL; Example Following is the C program for NULL pointer − #include int main() { printf("TutorialPoint C ... Read More
Pointers and Arrays A pointer in C is a variable that stores the address of another variable, which can be of any type(char, int, function). In a 32-bit system, the size of the pointer is 2 bytes. An array is a collection of similar data items stored in contiguous memory locations. In C, arrays can store various data types(char, int, double float) as well as specific types(pointer structures). For example, if we need to represent an array of 5 elements we need to create it as - int a [5] = {10, 20, 30, 40, 50}; ... Read More
A file is a collection of data stored in secondary memory. Files are used to store information that programs can determine. A file represents a sequence of bytes, whether it is a text file or a binary file. It is a collection of records or a location on the hard disk where data is stored permanently. Operations on Files The operations on files in the C programming language are as follows − Naming the file Opening the file Reading from the file Writing into ... Read More