Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Re: Check For null Arguments

by kcott (Canon)
on Mar 13, 2013 at 15:40 UTC ( #1023237=note: print w/replies, xml ) Need Help??

in reply to Check For null Arguments

G'day rfleisch,

Put "use strict;" and "use warnings;" at the start of your code and let Perl tell you where you've gone wrong. See strict and warnings.

While there may be others, one obvious problem that leaps out at me is "("$Do_Dir" == null )":

  • "null" is not a keyword in Perl - you're possibly thinking of undef.
  • "==" is an operator for testing numeric equality; use "eq" for string equality. See perlop: Equality Operators for more complete details.
  • The whole of that condition should probably be written as "(defined $Do_Dir)". See defined.

-- Ken

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1023237]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (8)
As of 2017-03-01 21:12 GMT
Find Nodes?
    Voting Booth?
    Before electricity was invented, what was the Electric Eel called?

    Results (429 votes). Check out past polls.