Regexp.Exec (gb.pcre)
Exec lets you execute a previously compiled regular expression against a subject text. This is mainly useful when you have many different subject texts you want to match against, because you can compile a regular expression once and use Exec repeatedly for increased speed.
Compile and Exec are both called automatically if you specify a pattern and subject text when creating a
Regexp object.
Here is the list of execution options that can be specified: