How to Iterate Over a Range of Numbers Defined by Variables in Bash

When working with Bash, iterating over a range of numbers is common in scripting. One might naturally reach for brace expansion (e.g., {1..5}) when the range is hardcoded, but things get a bit trickier when the range is defined by variables. In this blog post, we’ll explore different ways to iterate over a range of numbers when the endpoints are determined by variables.

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Understanding select_related and prefetch_related in Django ORM

 When working with Django ORM, optimizing database queries is crucial for performance, especially when dealing with related objects. Django offers two methods, select_related() and prefetch_related(), which are designed to reduce the number of database hits when fetching related data. But what exactly is the difference between these two methods, and when should you use each? Let’s dive deeper into their functionalities.

What is select_related?

The select_related() method is designed to work with foreign-key relationships. It performs an SQL join and retrieves data in a single query. This is highly efficient when you need to fetch related objects in one-to-one or foreign-key relationships because it avoids making multiple queries to the database.

When you use select_related(), Django generates a JOIN clause in the SQL query. This means that the related object’s data is fetched along with the original query, reducing the number of queries executed.

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JavaScript Function Declarations vs Function Expressions: What’s the Difference?

When working with JavaScript, you’ve likely come across two common ways to declare functions: function declarations and function expressions. At first glance, they may seem similar, but understanding the key differences between them can help you write more efficient and cleaner code.

In this blog post, we will explore these two function declaration methods, explain their differences, and provide examples to illustrate how each method behaves in various situations.

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Understanding Type Hints in Python 3.5: A Comprehensive Guide

Python is loved for its dynamic nature, allowing developers to quickly write and execute code without worrying about strict typing rules. However, as projects grow in size and complexity, managing types can become a challenge, especially in large codebases. To address this, Python 3.5 introduced type hints — a way to annotate expected types for variables, function parameters, and return values. While these hints don’t change Python’s dynamic behavior, they offer numerous advantages for improving code readability, debugging, and collaboration.

In this blog post, we’ll dive into what type hints are, how to use them effectively, and when they might be overkill. We’ll also explore some examples to see type hints in action.

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How to Determine If Your Linux System is 32-bit or 64-bit

When working with Linux, it’s important to know whether your operating system is 32-bit or 64-bit. This is especially useful when installing software, configuring build environments, or optimizing system performance. There are several methods to find out the bit version of your Linux system, each suited for different needs. In this blog post, we’ll walk through various ways to determine if your Linux installation is 32-bit or 64-bit.

1. Using uname to Check System Architecture

The uname command provides essential information about your Linux system, including the kernel and architecture type.

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How to Determine if a PHP Array is Associative or Sequential

In PHP, arrays are flexible and can act as both indexed arrays (or “sequential” arrays) and associative arrays. However, PHP treats all arrays as associative by default. So, how can you differentiate between an associative array and a sequential array?

An associative array uses string keys, while a sequential array uses numeric keys starting from 0 and increasing sequentially. In this blog post, we’ll explore a few different ways to check whether a given array is associative or sequential, using practical examples and approaches that avoid expensive operations.

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Passing Command-Line Arguments in Perl: A Beginner’s Guide

 Command-line arguments can be a powerful way to make Perl programs flexible and adaptable. Whether you’re running scripts in a production environment or automating tasks on your machine, understanding how to pass and handle command-line arguments is essential. In this post, we’ll explore various ways to pass arguments to a Perl script and how to handle them efficiently.

1. Using @ARGV to Access Command-Line Arguments

The simplest way to handle command-line arguments in Perl is by using the @ARGV array. This special array stores the list of arguments passed to the script when it is executed. Here’s how you can use it.

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