learn.dart+flutter shafi.dev

← → or space · progress saves for Continue on the roadmap

Goal

Keep each function easy to read top-to-bottom and cheap to test.

Size

  • If you scroll a long way to see the end, consider extracting steps with names (_validate, _normalize, _persist).
  • “Small” is not a character count; it is one clear job per function.

Early returns

  • Handle guard clauses first: null, empty input, feature flags, permission checks.
  • After guards, the “happy path” stays at one indentation level.

Nesting

  • Deep if inside if inside for is a signal to extract or invert conditions.

Practice tasks

  • Take one function with nested if/else and rewrite with early returns only.
  • Extract the body of a try block into Future<void> performWork() so try/catch stays thin at the boundary.
  • Add a private helper whose name reads like a sentence in the caller.