Fragile and Resilient Code

Break

The

Ownership

Break

The

Code

The journey of a thousand miles starts with one step

• Just add an extra parameter
• Just add a boolean parameter
• Managers and other 30+ function classes
• Break some windows
• var data;
• A big inheritance
• Evals and hidden evals
• Globals or global-like states.
• Drop the information hiding
• Couple everywhere
• Repeat the same solutions everywhere

How to get development velocity back

Escape plan

• Build walls - Contracts
• Flat Dependency Injection
• Build walls - Packages
• Semver everywhere
• Build walls - Tests
• Cyclomatic scan
• Global state container
• "Cut and paste" not always harmful
• Clean up tiny bits as you go
• Reduce dependencies