Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery

Re: Identifying if a variable is the product of a qr//

by Juerd (Abbot)
on Apr 25, 2002 at 10:46 UTC ( #161914=note: print w/replies, xml ) Need Help??

in reply to Identifying if a variable is the product of a qr//

This is ugly, but it works. (For 99.9% of all cases - if you are able to predict a scalar reference's stringification, this will fail. :)

sub is_qr { my ($qr) = @_; return 0 unless ref $qr; return 0 if defined $$qr; # Update: added this line. return 1 if ref $qr eq 'Regexp'; return index(qr/$qr/, "$qr") == -1; }
This assumes that everything blessed into Regexp is a qr//, but if you don't trust that, just remove the "return 1" line.

- Yes, I reinvent wheels.
- Spam: Visit eurotraQ.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://161914]
Discipulus 's hoping he needs a oneliner ;=)
VinsWorldcom takes a cookie from the platter on the sideboard.
Discipulus take his wine and hope the coockie is a 'tozzetto alle mandorle'

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (8)
As of 2017-04-26 20:29 GMT
Find Nodes?
    Voting Booth?
    I'm a fool:

    Results (488 votes). Check out past polls.