Principles

• Everything is an expression
• Errors are values
• Principle of least surprise
  • defaults represent most common cases
  • existing conventions and idioms are adopted
• Robustness Principle: be conservative in what you send, liberal in what you accept
• Clarity over brevity.
• There’s one idiomatic way to do it
• Regularity and Orthogonality. Define a small number of concepts and allow them to be combined without restrictions.