http://www.perlmonks.org?node_id=136419


in reply to string interpolation in RE

\ is special to all forms of quoting in Perl except for single-quoted here-docs. If you want two \'s in Perl then you need to put in four \'s:

print '\\decs17\dq'; # prints \decs17\dq print '\\\\decs17\dq'; # prints \\decs17\dq print '\\\\decs17\\dq'; # also prints \\decs17\dq
Note that I tend to use the last version because I find that it discourages me from getting confused into thinking that \ isn't special inside of single quotes and so I'm less likely to run into the problem you just did. (:

        - tye (but my friends call me "Tye")