20 ms·

(?=((?!exp).)*a.*) is also wrong; it doesn't match "expba", but (?~exp)a.* does.

• mnarayan01 10y ago
  /(?=((?!exp).)*a.*)/ =~ "expba" # => 1 for me at least (using #match is also truthy, but the matched string is not what I'd guess the absent operator would give).
  • rntz 10y ago
    Huh! Now I am super confused.