guard-clause – Tarik Billa

What does a comma in the guard syntax do?

December 27, 2023 by Tarik

Guards are described in Haskell 2010 section 3.13, Case Expressions (that section is about case expressions, not top-level declarations, but presumably the semantics are the same): guards → | guard1, …, guardn (n ≥ 1) guard → pat <- infixexp (pattern guard) | let decls (local declaration) | infixexp (boolean guard) For each guarded expression, … Read more

Refactoring Guard Clauses

September 17, 2023 by Tarik

A lot of projects that I’ve seen use a static Guard class. public static class Guard { public static void ArgumentIsNotNull(object value, string argument) { if (value == null) throw new ArgumentNullException(argument); } } It makes the code a lot cleaner, in my opinion. Guard.ArgumentIsNotNull(arg1, “arg1”);