How to find out pattern’cat’ in this string=‘ccccatgggctacatgggtcat’
? There are three ‘cat’ within the string and I want to return the
position of each match.
Although # match return the match , #pre_match and #post_match do the
tricks but they only work for the first match. How about the 2nd, third
match, and more? I try #scan(pattern) but it doesn’t return the
position for each match. I wonder how other handle this problem.