A character class in regexes is a special sequence that matches characters from some given set. For example, in the previous section, we already used a character class \s, which matches with an ASCII space as well as with some other whitespace characters, such as tabs. Let us explore character classes in regexes of Perl 6.
Character classes
The . (dot) character
A very simple character, just a single dot, can match with any character in the string. This is often used when you do not care about some character between the two parts. For example, the following code will match with a string that has any two characters between a and d:
say 'OK' if 'abcd' ~~ / a . . d /; # OK
say 'OK' if 'aefd...
