Adrián Szegedi

`getFirstMatch()` JavaDoc: > first string in **lexicographical order** that is matched by the given pattern. Which means it tries to _sort_ **ALL** of the generated matches. Your regex is infinite...

Problem --- It should be also taken into consideration that the backslash in the character class could have been escaped. **Input:** `\\d` (Java string literal `"\\\\d"`) **Expected output:** - transformed...