Do you remember the recursion error that occurred in the previous article? I wanted to dig deeper into this phenomenon once again. A quick recap: a recursion error happens when a function continually calls itself without a clear stopping condition, leading to excessive memory usage and eventually throwing an error when the memory stack is exceeded.
I came across a funny meme on YouTube featuring the code like this:
In the meme, A guy was dancing while pointing down and making copies of himself, who kept calling their clones without end, just like the recursive function.
I was experimenting with Perl again, as usual, filled with tons of "why" questions! This time, I stumbled upon a situation where I was just trying to print the elements of an array one by one, but somehow I got stuck in an infinite loop.
It all started when I was casually scrolling through my feed on X (formerly Twitter) and came across the term meta-programming. Initially, I was familiar with the term "meta" from HTML, specifically the <meta> tag, which provides metadata about a webpage, such as its description and author. This connection piqued my curiosity: what could meta-programming mean in the context of programming? What is the relationship between these two uses of "meta"?
PerlIn the previous article, we discussed enums and I provided an example of enum code in Perl using use enum qw(RED YELLOW GREEN);. In this example, we declared constants for traffic light colors. Now, let’s dive deeper into what quote and quote-like operators are in Perl and how we can leverage them to enhance the efficiency and clarity of our code.
So, there I was, scrolling through X one lazy afternoon—just catching up on the usual memes, tech banter, and random thoughts—when I stumbled upon something oddly specific. It was a meme about enums. Yep, enums.
printSometimes I mess around with Perl like this:
Just trying to write a simple script to sum two numbers and print the result.Running Scripts Without Shebang: Is It Really an Issue?
Seriously, when I first started writing scripts, to be honest, I never paid much attention to the small details like the shebang (#!/usr/bin/perl). All I knew was, if I wanted to run a script, I just had to type interpreter_command filename.ext, and everything would work fine. But these day, I found myself wondering, "Do I really need to include that shebang every time?"
subWhile learning on a simple Perl subroutine, I encountered an issue that left me puzzled. It seemed straightforward: I was trying to pass two numbers into a subroutine, add them, and print the result. However, instead of getting what I expected, I received a strange output.
scalar REFERENCES IN PERLIn Perl, data types are fundamental concepts that determine how data is stored and manipulated. Perl has several built-in data types, including scalars, arrays, hashes, and references. Among these, the three primitive data types are scalars, arrays, and hashes.