Guillermo Rodas 🦄
@guillermorodas.com
I help developers to improve their skills while creating quality products. https://glrz.me/links
Writing my JavaScript book has been incredible: I've iterated on several things, learned and polished the content so that anyone can truly learn from scratch.
I'm already working on Part 2, but parts 0 and 1 are available on my blog.
undefined.sh
I'm already working on Part 2, but parts 0 and 1 are available on my blog.
undefined.sh
November 5, 2025 at 3:02 PM
Writing my JavaScript book has been incredible: I've iterated on several things, learned and polished the content so that anyone can truly learn from scratch.
I'm already working on Part 2, but parts 0 and 1 are available on my blog.
undefined.sh
I'm already working on Part 2, but parts 0 and 1 are available on my blog.
undefined.sh
My JavaScript blog has officially learned English! 🇬🇧✨
After more than 2,000 reads in Spanish, I’m expanding the content so more people can join the learning journey.
Learn more: undefined.sh
After more than 2,000 reads in Spanish, I’m expanding the content so more people can join the learning journey.
Learn more: undefined.sh
Undefined Shell by Guillermo Rodas
Undefined Shell by Guillermo Rodas is your definitive source for everything related to programming and web development. At Undefined Shell, we are passionate about exploring and learning about innovat...
undefined.sh
November 2, 2025 at 7:48 PM
My JavaScript blog has officially learned English! 🇬🇧✨
After more than 2,000 reads in Spanish, I’m expanding the content so more people can join the learning journey.
Learn more: undefined.sh
After more than 2,000 reads in Spanish, I’m expanding the content so more people can join the learning journey.
Learn more: undefined.sh
The new reality of development. 💰
What plan are you on? 👀
What plan are you on? 👀
October 28, 2025 at 10:56 PM
The new reality of development. 💰
What plan are you on? 👀
What plan are you on? 👀
Reposted by Guillermo Rodas 🦄
📝 Importing vs fetching JSON
JSON imports are now supported cross-browser, but when would you use them rather than fetch()?
jakearchibald.com/2025/importi...
JSON imports are now supported cross-browser, but when would you use them rather than fetch()?
jakearchibald.com/2025/importi...
Importing vs fetching JSON
They behave differently, so make sure you pick the right one.
jakearchibald.com
October 22, 2025 at 2:50 PM
📝 Importing vs fetching JSON
JSON imports are now supported cross-browser, but when would you use them rather than fetch()?
jakearchibald.com/2025/importi...
JSON imports are now supported cross-browser, but when would you use them rather than fetch()?
jakearchibald.com/2025/importi...
I was testing how the theme-color works and some hacks to make it prettier.
I leave a before and after the hack so that the header and footer look “infinite”.
How does it look?
I leave a before and after the hack so that the header and footer look “infinite”.
How does it look?
October 23, 2025 at 9:12 AM
I was testing how the theme-color works and some hacks to make it prettier.
I leave a before and after the hack so that the header and footer look “infinite”.
How does it look?
I leave a before and after the hack so that the header and footer look “infinite”.
How does it look?
Ever built IKEA furniture and ended up with one screw left over? 🙃
Or watched someone twist a Rubik’s cube until suddenly everything clicks into place?
That’s what algorithms are about, following steps that look confusing until the logic reveals itself. 🧩
👉undefined.sh/posts/what-i...
Or watched someone twist a Rubik’s cube until suddenly everything clicks into place?
That’s what algorithms are about, following steps that look confusing until the logic reveals itself. 🧩
👉undefined.sh/posts/what-i...
What is an Algorithm? • Undefined Shell by Guillermo Rodas is your definitive source for everything related to programming and web development. At Undefined Shell, we are passionate about exploring and learning about innovative digital product development, especially in the Full-stack and JavaScript realm. We offer detailed tutorials, analysis of the latest technological trends, and practical tips for developers of all levels. Join our community passionate about web development and take your skills to the next level. • Undefined Shell by Guillermo Rodas
An algorithm is a set of instructions or steps that are followed to solve a problem or carry out a particular task. So, a manual for assembling a prefabricated piece of furniture or a cooking recipe could be considered algorithms.
undefined.sh
October 22, 2025 at 6:49 AM
Ever built IKEA furniture and ended up with one screw left over? 🙃
Or watched someone twist a Rubik’s cube until suddenly everything clicks into place?
That’s what algorithms are about, following steps that look confusing until the logic reveals itself. 🧩
👉undefined.sh/posts/what-i...
Or watched someone twist a Rubik’s cube until suddenly everything clicks into place?
That’s what algorithms are about, following steps that look confusing until the logic reveals itself. 🧩
👉undefined.sh/posts/what-i...
The problem isn't using AI to create content; the problem is that generating poor-quality content is becoming easier.
The theory of the dead internet.
The theory of the dead internet.
September 18, 2025 at 12:19 PM
The problem isn't using AI to create content; the problem is that generating poor-quality content is becoming easier.
The theory of the dead internet.
The theory of the dead internet.
Ever noticed how a yoga mat only gets dirty on the side that touches the floor?
Well, I invented the Möbius Yoga Mat: the first mat that gets dirty all over, on every surface.
No wasted space.
Well, I invented the Möbius Yoga Mat: the first mat that gets dirty all over, on every surface.
No wasted space.
August 27, 2025 at 9:58 AM
Ever noticed how a yoga mat only gets dirty on the side that touches the floor?
Well, I invented the Möbius Yoga Mat: the first mat that gets dirty all over, on every surface.
No wasted space.
Well, I invented the Möbius Yoga Mat: the first mat that gets dirty all over, on every surface.
No wasted space.
A year ago I became a Swedish citizen.
How time flies 🥲
How time flies 🥲
August 26, 2025 at 6:17 PM
A year ago I became a Swedish citizen.
How time flies 🥲
How time flies 🥲
AI can trick you into laziness, making you think it can do everything for you. But once you get past that illusion, the magic happens: you realize it actually amplifies your knowledge. 🚀
August 22, 2025 at 3:46 PM
AI can trick you into laziness, making you think it can do everything for you. But once you get past that illusion, the magic happens: you realize it actually amplifies your knowledge. 🚀
I'm so eager to get obsessed with a good idea.
August 14, 2025 at 8:37 PM
I'm so eager to get obsessed with a good idea.
New generations will never know the thrill of searching for something online without even knowing where to start.
Playing detective, falling into rabbit holes, discovering new ideas, and following threads to unexpected places.
Playing detective, falling into rabbit holes, discovering new ideas, and following threads to unexpected places.
August 13, 2025 at 3:11 PM
New generations will never know the thrill of searching for something online without even knowing where to start.
Playing detective, falling into rabbit holes, discovering new ideas, and following threads to unexpected places.
Playing detective, falling into rabbit holes, discovering new ideas, and following threads to unexpected places.
Read generated AI code is so tiring.
August 13, 2025 at 6:18 AM
Read generated AI code is so tiring.
It's funny how there were so many posts, demos, and interviews about GPT-5, all clearly prepared in advance for its launch today.
It feels like they knew it wouldn't be that surprising, so they needed to make some noise.
It feels like they knew it wouldn't be that surprising, so they needed to make some noise.
August 8, 2025 at 1:12 AM
It's funny how there were so many posts, demos, and interviews about GPT-5, all clearly prepared in advance for its launch today.
It feels like they knew it wouldn't be that surprising, so they needed to make some noise.
It feels like they knew it wouldn't be that surprising, so they needed to make some noise.
The true engineering value is to avoid unnecessary work, not to write faster code.
The less code you write, the more you get paid. 💰
The less code you write, the more you get paid. 💰
August 6, 2025 at 8:26 PM
The true engineering value is to avoid unnecessary work, not to write faster code.
The less code you write, the more you get paid. 💰
The less code you write, the more you get paid. 💰
Being and adult sucks.
August 1, 2025 at 5:45 PM
Being and adult sucks.
I’ve always felt strong in Frontend, even as a Fullstack dev.
But with everything happening in AI, I shifted a few months ago, now I’m part of an AI Infra team.
Has anyone else changed direction because of AI?
But with everything happening in AI, I shifted a few months ago, now I’m part of an AI Infra team.
Has anyone else changed direction because of AI?
May 29, 2025 at 1:01 PM
I’ve always felt strong in Frontend, even as a Fullstack dev.
But with everything happening in AI, I shifted a few months ago, now I’m part of an AI Infra team.
Has anyone else changed direction because of AI?
But with everything happening in AI, I shifted a few months ago, now I’m part of an AI Infra team.
Has anyone else changed direction because of AI?
Disappointed of the AI I will have a job for many years more.
May 15, 2025 at 6:27 PM
Disappointed of the AI I will have a job for many years more.
🚀 Want to stay ahead in AI?
Practical insights every developer should hear 👇
Had an awesome chat with
@AdiMazorKario
Now on YouTube!
🎥 youtu.be/IoT-XabDMKU
Practical insights every developer should hear 👇
Had an awesome chat with
@AdiMazorKario
Now on YouTube!
🎥 youtu.be/IoT-XabDMKU
Staying Ahead in AI: Practical Insights for Developers- Google Gemma Days, Paris
youtu.be
April 9, 2025 at 1:05 PM
🚀 Want to stay ahead in AI?
Practical insights every developer should hear 👇
Had an awesome chat with
@AdiMazorKario
Now on YouTube!
🎥 youtu.be/IoT-XabDMKU
Practical insights every developer should hear 👇
Had an awesome chat with
@AdiMazorKario
Now on YouTube!
🎥 youtu.be/IoT-XabDMKU
I think this is the first ad I’ve seen that uses Gen AI.
If you look closely at the details, it’s obvious.
If you look closely at the details, it’s obvious.
March 27, 2025 at 4:28 PM
I think this is the first ad I’ve seen that uses Gen AI.
If you look closely at the details, it’s obvious.
If you look closely at the details, it’s obvious.
Being a good graphic designer or illustrator is not just about drawing beautifully or applying styles.
Those who think that don't understand work.
Now, if your job is repetitive or doesn't require critical thinking, an AI will do it sooner or later.
It doesn't matter the profession.
Those who think that don't understand work.
Now, if your job is repetitive or doesn't require critical thinking, an AI will do it sooner or later.
It doesn't matter the profession.
March 27, 2025 at 10:00 AM
Being a good graphic designer or illustrator is not just about drawing beautifully or applying styles.
Those who think that don't understand work.
Now, if your job is repetitive or doesn't require critical thinking, an AI will do it sooner or later.
It doesn't matter the profession.
Those who think that don't understand work.
Now, if your job is repetitive or doesn't require critical thinking, an AI will do it sooner or later.
It doesn't matter the profession.
The reality is that if you want to move up in your career, you need to go the extra mile, or someone else will and get the promotion instead.
And I’m not talking about working extra hours—you can always work smarter.
And I’m not talking about working extra hours—you can always work smarter.
February 10, 2025 at 11:50 AM
The reality is that if you want to move up in your career, you need to go the extra mile, or someone else will and get the promotion instead.
And I’m not talking about working extra hours—you can always work smarter.
And I’m not talking about working extra hours—you can always work smarter.
Good morning, especially for those who have not yet drink coffee.
January 29, 2025 at 8:45 AM
Good morning, especially for those who have not yet drink coffee.