Elixir uses the “pin operator” “Use the pin operator ^ when you want to pattern match against a variable’s existing value rather than rebinding the variable.”

Elixir uses the “pin operator” “Use the pin operator ^ when you want to pattern match against a variable’s existing value rather than rebinding the variable.” iex> not_found = 404 404 iex> ^not_found = 200 ** (MatchError) no match of right hand side value: 200 https://elixir-lang.org/getting-started/pattern-matching.html#the-pin-operator https://elixir-lang.org/getting-started/pattern-matching.htm...