Help for this page

Select Code to Download


  1. or download this
    #!perl

...
234
213
12345
  2. or download this
    234 okay
12345 okay
  3. or download this
    ((??{$+ + 1}))+ matches null string many times
before HERE mark in regex
m/^(\d)((??{$+ + 1}))+ << HERE $/
at ./test.pl line 8.