Conventions and practice.
WHAT THE LANGUAGE FAVOURS
Clarity at the point of use Value types Immutability Explicit handling of absence and failure
WHAT NAMING CONVENTIONS ARE
Types in one case, members in another Methods named as phrases reading naturally at the call site Boolean properties reading as assertions
WHAT TO DECLARE BY DEFAULT
Constants, not variables.
WHY
It states intent, and the compiler enforces it.
WHAT TO PREFER
Structures over classes, unless identity is needed Protocols over inheritance Extensions to organise code by purpose
WHAT EXTENSIONS ARE USEFUL FOR
Grouping conformance to a protocol with its implementation.
WHAT TO AVOID
Force unwrapping outside genuine programmer errors Deeply nested closures Very long functions Abbreviations that are not universal
WHAT TO USE
Guard statements for early exit The standard collection operations rather than manual loops Access control, restricting visibility by default
WHY ACCESS CONTROL MATTERS
Anything exposed becomes something you cannot change freely.
WHAT TO ADOPT
The formatter and linter, applied automatically.
