Today I Learned

Use `dig` to safely navigate nested hashes without worrying about nil values: ```ruby user_data = { user: { profile: { name: 'John' } } } user_data.dig(:user, :profile, :name) # => 'John' us...

Create responsive grids without media queries: ```css .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; } ``` This automatically adjusts the ...

Fix previous commits easily: ```bash # Create a fixup commit git commit --fixup HEAD~2 # Then rebase with autosquash git rebase -i --autosquash HEAD~3 ``` Git automatically reorders and marks...

Instead of creating pass-through methods, use delegate: ```ruby class Post < ApplicationRecord belongs_to :user # Instead of: # def username # user.name # end # Use: de...

Get detailed information about query performance: ```sql EXPLAIN (ANALYZE, BUFFERS) SELECT * FROM posts WHERE published = true; ``` This shows buffer usage, helping identify if queries are hi...