returns the matches from "string" applied to the regex 'pattern'. if n is specified this will return the grouped matches of the n'th substring matching the specified pattern. if n and m are specified, all of the grouped matches of the n-m substrings will be returned.
"string" - the string to match against the pattern and extract substrings from
'pattern' - a regular expression pattern that defines wether or not we have a match
# trim whitespace from start of a string $trimmed = matches("\t this is a test", '\s*(.*)')[0]; println($trimmed);
this is a test