Shared State Is Incorrect State: Reduce Hidden Dependencies
The most difficult bugs often come from code that changes data you did not realize it could touch.
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Breaking Temporal Coupling: Design Beyond Sequence
Systems become fragile when correctness depends on invisible timing assumptions.
Configuration: Separate Policy from Mechanism
If changing a setting requires changing code, your system is tighter than it needs to be.
Inheritance Tax: The Cost of Rigid Hierarchies
Inheritance feels elegant at first, but deep hierarchies often charge interest later.
Transforming Programming: From State to Flow
When you reduce hidden state and focus on clear transformations, debugging turns from detective work into simple reasoning.
Juggling the Real World: Designing for Reality
Real world software fails not because it is complex, but because it was designed for ideal conditions.
Decoupling and the Law of Demeter: Talk Only to Your Friends
The less your code knows about its surroundings, the easier it is to change safely.
Do Not Outrun Your Headlights: Know Your Limits
Moving fast without visibility feels productive until the cost of mistakes becomes clear.
How to Balance Resources: Do Not Leak & Do Not Starve
Most systems fail slowly when resources are mismanaged, long before they fail loudly.
Assertive Programming: Catch Problems Early
Assertive code fails early, clearly, and exactly where the real problem begins.