Clean Structure

Clean Structure

In this lesson — part of Idiomatic Code — you'll learn clean structure in Dart and why it matters in real work.

Why it matters

Refactoring improves code's design without changing behavior — safely, in small steps.

Key ideas

• Code smells
• Small, safe steps
• Tests as a safety net
• Rename, extract, inline

In practice

Here's the idea in pseudocode — the exact syntax varies by language:

// Dart: extract a function
function taxFor(x) { ... }

Try it yourself

Exercise: Take a long Dart function and extract two well-named helpers.

Recap

You now understand clean structure and can apply it in Dart. Mark this lesson complete and continue to the next one.