Guard

Definitions

1. A conditional statement that exits the current scope early if a condition is not met, used to reduce nesting and improve readability. In Swift, 'guard' enforces early returns; in Elixir and Haskell, guards filter pattern matches.

   In plain English: A coding pattern where you check for bad conditions first and bail out early, keeping the main logic at the top level instead of buried inside layers of if-statements.

   Example: "Using guard clauses instead of nested ifs turned a 40-line function into 15 readable lines."

Related Terms

• ARC
• Case Class
• CocoaPods
• Continuation
• Cut
• Do-Loop
• Nil Coalescing
• Switch Statement