Step into Swift logo

What is a short circuiting?

Short Circuiting

What is short circuiting?

  • Occurs when checking predicate logic.
  • E.g: AND operator && -> If the left side of an operator fails, the rest of the predicate will not be checked. No way for the expression to be true.
if emailIsNotEmpty && passwordIsNotEmpty {
  • Also used with an if let statement.
  • If short circuiting did not kick in, the app could crash depending on the latter checks.
if let value = array.first, value != 100 {

< All Posts