Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Re: Default Hash Key

by toolic (Bishop)
on May 02, 2008 at 00:52 UTC ( [id://684065]=note: print w/replies, xml ) Need Help??


in reply to Default Hash Key

Is there a way to define a default value for a hash?
I do not know. But, you could create a function to see if a key exists:
use warnings; use strict; my %description = ( a => 'a vowel', b => 'a consonant' ); print 'a is ', check(\%description, 'a'), "\n"; print 'b is ', check(\%description, 'b'), "\n"; print '~ is ', check(\%description, '~'), "\n"; sub check { my ($href, $key) = @_; return (exists $href->{$key}) ? $href->{$key} : 'not in the alphab +et'; }

prints:

a is a vowel b is a consonant ~ is not in the alphabet

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://684065]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others learning in the Monastery: (2)
As of 2024-03-19 06:15 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found