NSSpain 2023: Bug-Free by Design - Crafting Swift Code That Doesn't Sting

Detailed image description of the sketchnote

What is good code?

• Readable
• Maintainable
• Testable
• Nice to look at
• Correct
• Robust
• Performant
• Serves better UX

"Best code is code you don't write!" True.

Defer

• defer {...}`
• Always called at "end' of finction
• cleanup code
• end tasks
• close files

We love compilertime checks!

Consistent UI updates

• show/hide activity loader us data vs error
• use enums
• use late lets to find bugs

Safer assets

• use enums
• have test for all assets & conform to CaseIterable

Safer identifiers

• use typealiases instead of strings directly
• makes them easier to find
• separate types
• safer API

Refactoring with the compiler

• use optional instead of -1
• use private (set)