Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

Re: Check For null Arguments

by kcott (Abbot)
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


Comment on Re: Check For null Arguments
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1023237]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (4)
As of 2014-11-29 03:01 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My preferred Perl binaries come from:














    Results (203 votes), past polls