Francisco Javier Palacios Pérez Fco. Javier Palacios Pérez
Software Developer

Posts - Page 3

Posts - Page 3

while loops in Python: repetition with a condition 7 Learn to code from scratch with Python

while loops in Python: repetition with a condition

You already know how to make decisions with if. Now learn how to repeat them. while loops execute code over and over as long as a condition holds — and yes, infinite loops are very real.

Interactive containers and exec: get inside, run commands, get out 4 Mastering Docker from Scratch

Interactive containers and exec: get inside, run commands, get out

Learn to open shells inside containers, run commands in live containers with docker exec, copy files with docker cp, and know when to use interactive vs. detached mode.

Cherry-picking commits in Git 21 Mastering Git from scratch

Cherry-picking commits in Git

Learn how to use git cherry-pick to apply specific commits from one branch to another—perfect for backporting hotfixes, rescuing buried work, and surgical history management.

Interactive Rebase in Git: Edit Your History Like a Pro 20 Mastering Git from scratch

Interactive Rebase in Git: Edit Your History Like a Pro

Learn how to use git rebase -i to reorder, combine, rename, and delete commits before integrating your work. Take full control of your history, commit by commit.

AI for Programming: The Paradigm Shift 3 AI for Developers

AI for Programming: The Paradigm Shift

From writing code to directing AI: understand the new mental model, which tasks are worth delegating and which aren't, and why clarity of thought is now your most valuable skill.

How LLMs Work (Without the Math) 2 AI for Developers

How LLMs Work (Without the Math)

Understand how Large Language Models work under the hood — no equations, just the mental models that explain why they hallucinate so confidently and how to use that to your advantage.

Normal Mode: The Power of Vim 4 Mastering Vim from Scratch

Normal Mode: The Power of Vim

Normal mode isn't just where you land between keystrokes — it's where Vim lives. Learn word movements, the operator+motion grammar, and how a handful of keys gives you near-infinite editing power.

Conditional statements in Python: if, elif, and else 6 Learn to code from scratch with Python

Conditional statements in Python: if, elif, and else

Your code has always executed the same instructions in the same order. With if, elif, and else, it can finally make decisions. Learn to write programs that react to data.

Docker images and containers: understanding the relationship 3 Mastering Docker from Scratch

Docker images and containers: understanding the relationship

What exactly is a Docker image, how are layers stacked, and what happens to a container when it stops? The image-container relationship is the mental model everything else depends on.

Installing Docker and running your first container 2 Mastering Docker from Scratch

Installing Docker and running your first container

Install Docker on Linux, macOS, or Windows and run your first container. Docker's architecture, the image vs container distinction, and the essential commands to get started.

Common beginner mistakes in Python (and how to fix them) 5.5 Learn to code from scratch with Python

Common beginner mistakes in Python (and how to fix them)

Python's error messages are your best ally — if you know how to read them. Learn to decode tracebacks, understand the most common beginner mistakes, and build a debugging mindset from day one.

Rewriting History with git rebase 19 Mastering Git from scratch

Rewriting History with git rebase

Learn what rebase is in Git, when to use it instead of merge, how to resolve conflicts during the process, and the golden rule you must never break.