In Python, some special methods have names that start and end with double underscores. These are called dunder methods. One such method is __exit__, which is used in context managers for cleanup tasks. Context Manager in Python Context Mangers helps to manage resources such as files, database connections, or network links. It sets up a temporary environment to run a block of code. When the block ends, Python closes the file or disconnects the connection automatically. This prevents unnecessary resource consumption when we leave a file open or keep a connection (such as, network, database) active. Python runs context managers ... Read More

Understanding Closures in Python In Python, functions are treated as first-class citizens. This means you can assign them to variables, pass them as arguments to other functions, or even return them from other functions. A closure is a special kind of inner function that remembers variables from its enclosing (outer) function’s scope, even after the outer function has finished running. This allows the inner function to retain access to those variables and behave as if the outer scope still exists. To form a closure in Python, it is necessary to meet the following two conditions − ... Read More

Python __call__ Method In Python, everything is treated as an object, including integers, strings, classes, and even functions. It provides a special method named __call__ that allows an instance of a class (i.e. object) to behave like a function (i.e. we can call/invoke it). When we define the __call__ method inside a class, we can call its instance (object) using parentheses, just like a regular function. Syntax Following is the syntax to use the __call__ method inside a class − class MyClass: def __call__(self, *args, **kwargs): # Implementation of the method ... Read More

Introduction If we want to rename any file in Linux, we use “mv” command. But mv command can only rename one file at a time, it can not rename multiple files at one time in terminal. If we want to rename multiples files then we have to use mv command in different way . Also there are other commands available like “rename” , “mmv”, “renameutils” etc. Though some of these commands are not installed default in Linux , we need to install them separately. In this artile, let us understand each command with some example. Approach 1: Using “mv” command ... Read More

Golang, also known as Go, is a popular programming language that is known for its simplicity, efficiency, and performance. Slices are an important data structure in Golang that allows us to work with a sequence of elements of the same type. In this article, we'll discuss how to pass a slice to a function in Golang, and provide a step-by-step guide on how to achieve this task. What is a Slice in Golang? A slice in Golang is a dynamic array, which means it can grow or shrink as needed. It's a powerful data structure that allows us to work ... Read More

Golang, also known as Go, is a powerful programming language that offers efficient and scalable solutions for building modern software. One of the essential features of Golang is the ability to handle Unicode characters, which makes it possible to work with various languages and scripts. In this article, we'll discuss how to map a rune to uppercase in Golang, and provide a step-by-step guide on how to achieve this task. What is a Rune in Golang? A rune in Golang is a Unicode code point, which represents a single character. In Golang, the type for a rune is rune, and ... Read More

If you're working with runes in Golang and need to convert them to title case, it can be a bit tricky. However, with the right tools and techniques, it's certainly achievable. In this article, we'll explore how to map a rune to title case in Golang, providing you with a step-by-step guide to help you achieve your goals. Understanding Runes in Golang Before we dive into how to map a rune to title case in Golang, let's take a moment to understand what runes are in this programming language. In Golang, a rune is a Unicode code point, which can ... Read More

If you're working with runes in Golang, you may need to map them to a specified case. This can be useful when dealing with text that contains both uppercase and lowercase characters, or when you need to convert text to a specific case for formatting purposes. In this article, we'll go over how to map a rune to a specified case in Golang, and provide some helpful tips for optimizing your code. What is a Rune in Golang? Before we get into mapping runes to a specific case, it's important to understand what a rune is in Golang. In Golang, ... Read More

In Go, runes are used to represent Unicode code points, and they are often used in text processing applications. In some cases, you may need to convert a rune to its lowercase representation. In this article, we will discuss how to map a rune to lowercase in Go. Mapping a Rune to Lowercase in Go In Go, you can use the unicode.ToLower() function to convert a rune to its lowercase representation. The ToLower() function takes a single parameter, which is the rune that you want to convert to lowercase, and returns the lowercase version of the rune. Example Here is ... Read More

Byte slices are an important data type in Go that allow you to work with binary data. In many cases, you will need to join the elements of a byte slice to create a single string. In this article, we will discuss how to join the elements of a byte slice in Go. Joining the Elements of a Byte Slice in Go In Go, you can join the elements of a byte slice using the bytes.Join() function. Here is the syntax for using bytes.Join() − func Join(s [][]byte, sep []byte) []byte where s is a slice of byte slices, ... Read More