Or possibly:

say join "-", split /\w{1,3}\K/ for @list;

With this list:

my @list = qw (12 123 1234 12345 123456 1234567 234 2345 23456);

this gives the following output:

12
123
123-4
123-45
123-456
123-456-7
234
234-5
234-56

[download]

In reply to Re: Regex split string into n-length by Laurent_R
in thread Regex split string into n-length by hankcoder

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