Polymorphism is a key concept in object-oriented programming that allows a single interface to be used for different types of objects. It enables the flexibility to define a common method across multiple classes. To better illustrate this concept, let’s take the example of two classes: Dog and Cat. class Dog: def eat(): print('Eating dog food') class Cat: def eat(): print('Eating cat food') In the above code snippet, both classes have a method called eat....
When working with variables in Python, it’s important to understand their scope - where they are visible and accessible within your program. The scope of a variable depends on where it is declared. Global Variables When a variable is declared outside of any function, it is considered a global variable. Global variables are accessible to any part of the program, including functions. Here’s an example: age = 8 def test(): print(age) print(age) # Output: 8 test() # Output: 8 In this example, age is a global variable....
Discover the lifecycle events in React and learn how to effectively use them. React class components have hooks for various lifecycle events. One of the advantages of React is that it allows function components to access these events as well, albeit in a different way. Throughout a component’s lifetime, there are several events that get called, and each event provides an opportunity to hook into and provide custom functionality. Let’s delve into the three main phases of a React component lifecycle: Mounting, Updating, and Unmounting....
React StrictMode is a powerful tool that allows you to enable a range of checks performed by React, providing valuable warnings and insights. By utilizing the built-in component React.StrictMode, you can easily enable these checks within your React application. To implement React StrictMode, one straightforward approach is to wrap your entire App component with <React.StrictMode></React.StrictMode> in the index.js file. Here’s an example: import React from 'react'; import ReactDOM from 'react-dom'; ReactDOM....
When connecting the positive and negative poles of a battery directly, an excessive amount of current flows, potentially damaging the battery. To control this electrical flow, we introduce the concept of resistance. Resistance serves as a restriction to the current flowing through a circuit. Each component in a circuit possesses some degree of resistance, including the wires themselves, although their resistance is typically very minimal. The unit used to measure resistance is called the ohm, denoted by the symbol Ω....
RGB LEDs are a unique type of LED that can display various colors based on their configuration. While traditional LEDs typically emit a single color, RGB LEDs combine red, blue, and green LEDs into one, allowing for a wide range of color options. In addition to the three primary color leads, RGB LEDs also feature a common pin. There are two types of RGB LEDs: common anode and common cathode. It’s essential to understand the type you’re working with as it affects how you build your circuits....
In the world of electronics, circuits play a crucial role in making various components work together. A circuit consists of different elements that perform specific functions. To power these circuits, we often rely on voltage sources like batteries or devices such as an Arduino board. Let’s consider a typical circuit with a 5V voltage source. This source has a positive and a negative pole. Connecting these poles directly using a wire leads to what we call a short circuit....
Tags: SWC, JavaScript, TypeScript, Babel, speed, Vite, Turbopack, Webpack SWC is an increasingly popular tool in the world of JavaScript and TypeScript. It serves as a handy solution for converting code written in these languages into JavaScript that is compatible with older browsers as well as modern ones. In essence, SWC can be viewed as the new and improved version of Babel, but with a remarkable speed advantage. It is claimed to be more than 20 times faster than its predecessor....
Tags: Swift, classes, inheritance, instance methods, type methods Classes in Swift are similar to structures, but they have some important differences. A class is defined using the class keyword, followed by the class name. Inside a class, you can define stored properties, which are variables that hold data specific to each instance of the class. To create a new instance of a class, you use the class name followed by empty parentheses....
In Swift, the order in which operators are evaluated can have a significant impact on the result of an expression. This order is determined by the operator precedence and associativity. In this tutorial, we’ll explore how these concepts work in Swift. Let’s start with an example: let amount = 1 + 2 * 3 The value of amount can vary depending on whether the addition (1 + 2) is calculated before the multiplication (2 * 3)....