- Challenge 1: Write a complex regex that matches “myself”, “yourself” and “thyself” .
- You can do this with
/(my|your|thy)self/.
- The above uses Alternation.
- Challenge 2: Write the same regex for “good”, “goodness” and “goods”.
/good(ness|s)?/
- The
? is used to match 0 or more times.
- The
|s also matches “goods”.
- Can mix alternation with repetion operators.
- Final Challenege 3: A regex which matches “do” or “does”, then followed by “no”, “not” or “nothing”.
[Dd] makes sure it matches at the beginning of a sentence.- A longer match is preferred first by the regex engine.
/[Dd]o(es)? (nothing|not|no)/