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How Callbacks Work in Node.js

Node.js callbacks are a special type of function passed as an argument to another function. They're called when the function that contains the callback as an argument completes its execution, and allows the code in the callback to run in the meantime. Callbacks help us make asynchronous calls. Even

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Linux Server Tutorial – How to Login, Communicate, and Transfer Files

Did you know that 96% of the top 1 million web servers [https://zd.net/3md7zr4] are running Linux? Yes. You heard that right. So being able to work with Linux servers is a great skill to have. In this article, you'll learn how to connect to a Linux server using

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How to Create a CSV File Using Python

CSV is an acronym for comma-separated values. It's a file format that you can use to store tabular data, such as in a spreadsheet. You can also use it to store data from a tabular database. You can refer to each row in a CSV file as a data

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Python RegEx – How to Import a Regular Expression in Python

Virtually all the programming languages out there support regular expressions. Regex is built into languages like JavaScript and Pearl, while others like Java and Python have standard libraries for working with it. In this article, we’ll look at how you can import regular expressions in Python and use it. We’ll

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Python Dictionary – How to Create a Dict in Python (Hashmap)

Welcome to this Python article on creating a dictionary (also called a hashmap). A dictionary or hashmap is an unordered grouping of key-value pairs in Python. Since each value can be accessed by its corresponding key, it offers a practical means of storing and retrieving data. We'll cover the

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Security and Privacy – What You Should Know to Protect Your Data

I've talked a lot about security and privacy in my "A Beginners Guide to Digital Security [/news/understanding-digital-security/]" and "What Is Digital Privacy [/news/beginners-guide-to-digital-privacy/]" articles. So why are we flogging this certifiably dead horse now? Because it's not dead. Security and privacy are as or more important than anything else in

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Python VS C++ Time Complexity Analysis

Speed is important in programming languages, and some execute much faster than others. For example, you might know that C++ is faster than Python. So why is this the case? Well, C++ is a language that uses a compiler, not to mention it is a much lower-level programming language than

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How to Orchestrate an ETL Data Pipeline with Apache Airflow

Data Orchestration involves using different tools and technologies together to extract, transform, and load (ETL) data from multiple sources into a central repository. Data orchestration typically involves a combination of technologies such as data integration tools and data warehouses. Apache Airflow is a tool for data orchestration. With Airflow,

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Why Python is Good for Beginners – and How to Start Learning It

Python is a programming language that has relatively simple syntax. This makes it an ideal choice for beginners who are just starting out in the field of programming. Python is also a very versatile language, which means that you can use i for a wide variety of tasks and

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How to Add Categories to a Ruby on Rails Application

Creating a category page is essential for most web applications these days. Different kinds of applications like blogs, ecommerce sites, movie streaming platforms, and many others have category features. This article will show how to add categories to Ruby on Rails applications. This is a beginner-friendly tutorial, so you can

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HTML for Beginners – How to Get Started with Web Development Basics

Have you always been interested in learning HTML but didn't know where or how to start? Well, this guide is for you. In it, we will look at: * An introduction to HTML * A Brief History of HTML * Why Learn HTML? * Prerequisites for

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