Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

Re^2: Use a module only if it is in use

by vitoco (Friar)
on Sep 02, 2009 at 14:57 UTC ( #792937=note: print w/ replies, xml ) Need Help??


in reply to Re: Use a module only if it is in use
in thread Use a module only if it is in use

The & was what I forgot in my tests!!!

M::hello("again") if exists &M::hello;

also works. Thank you!


Comment on Re^2: Use a module only if it is in use
Select or Download Code
Re^3: Use a module only if it is in use
by ikegami (Pope) on Sep 02, 2009 at 15:13 UTC

    exists returns true if the sub is declared, whether it's been defined or not.

    defined returns true if the sub is defined.

    sub foo; # exists but not defined sub bar {} # exists and defined

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://792937]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others avoiding work at the Monastery: (7)
As of 2014-12-25 22:20 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (163 votes), past polls