Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Re: Re: (jeffa) Re: permutation understanding

by greywolf (Priest)
on May 25, 2002 at 18:36 UTC ( [id://169288]=note: print w/replies, xml ) Need Help??


in reply to Re: (jeffa) Re: permutation understanding
in thread permutation understanding

A simple fix:
if (exists $food) { }
Update: Oops, I jumped the gun on that one.

mr greywolf

Replies are listed 'Best First'.
Re: Re: Re: (jeffa) Re: permutation understanding
by Anonymous Monk on May 25, 2002 at 18:55 UTC
    which version of Perl are you using??? exists may be used on hash or array elements or subroutines, not scalar variables.
Re: Re: Re: (jeffa) Re: permutation understanding
by theguvnor (Chaplain) on May 25, 2002 at 21:36 UTC

    Er, what he means is, you want to test for definedness....

    ..Jon

    Update - you're right Anonymous. Mea culpa. My embarrassed apologies to all. )c:

      Testing with defined would be "infinitely" worse than either the simple true/false test which has a potential off-by-one error or the broken usage of exists. Please test your suggested "fixes".

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://169288]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others chilling in the Monastery: (3)
As of 2024-03-29 04:55 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found