Today I Learned (TIL)

A collection of quick notes and snippets that I’ve learned day to day. These are small discoveries, tips, and insights that I find worth remembering.

2025

March

25-03-2025

• Rails Testing: Learned about rails test -p for parallel test execution

20-03-2025

• Bevy: Explored Material Extensions for enhanced rendering capabilities

19-03-2025

• Homebrew: Discovered Brewfile for managing package dependencies

18-03-2025

• Ruby: Learned about each_cons method on arrays for consecutive element iteration

16-03-2025

• Rust: Discovered retain method on Vectors for in-place filtering

February

13-02-2025

• CSS Tools: Found css.oddbird.net - a great resource for CSS utilities and tools

2024

November

21-11-2024

• LaTeX: Used SciPoster template for discrete math cheat sheet
• LaTeX: Created Hasse Diagrams with tikzpicture

18-11-2024

• GitHub: Discovered Slash commands for GitHub Pull Requests automation

12-11-2024

• Vim: Learned to sort lines and remove duplicates using sort u
• Bitbucket: Found the beta syntax highlighting feature

11-11-2024

• Ruby Documentation: Learned about the @see directive for better docs
• Ruby: Discovered the .new.tap method for cleaner object initialization
• Vim: Copy current file path to clipboard: let @+ = expand("%:p")

05-11-2024

• Git: How to use commit templates for standardized commit messages
• Postman: Import curl commands directly into Postman

October

26-10-2024

• Vim: Mastered folding commands zo (open) and zc (close)

23-10-2024

• Ruby: Explored ECS (Entity Component System) architecture patterns

16-10-2024

• Git: Using ! in .gitignore to include specific files:

  /.env*
  !/.env*.erb
  !/.env.example
  

02-10-2024

• 1Password CLI: How to list and create items using the OP CLI
• SSH: Explored different SSH key formats and their use cases

01-10-2024

• Google Docs: Creating collapsible sections using pageless mode

September

18-09-2024

• Git: During rebase, deleted lines can cause commits to be dropped
• Ruby: nil.class returns NilClass (obvious but good to remember)

16-09-2024

• HTML: Deep dive into the <colgroup> element (MDN docs)
• Rails: Difference between validates_presence_of and validate :foo, presence: true

13-09-2024

• TMUX: Enter copy mode with CTRL+S + [
• Vim/Clipboard: "+y yanks text into the system clipboard

10-09-2024

• Database Tools: dbdiagram.io for designing database diagrams
• Development: Snapplet seed tool for database seeding

January

03-01-2024

• Shell: ls -Am for comma-separated listing format