Count occurrences of a substring

sub count-substring($big, $little) { +$big.comb: / :r $little / }
 
say count-substring("the three truths", "th"); # 3
say count-substring("ababababab", "abab");     # 2
 
say count-substring(123123123, 12);            # 3

The :r adverb makes the regex "ratchet forward" and skip any overlapping matches. .comb - when given a Regex as an argument - returns instances of that substring. Also, prefix + forces numeric context in Raku (it's a no-op in Perl 5). For the built in listy types that is the same as calling .elems method. One other style point: we now tend to prefer hyphenated names over camelCase.