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Re^2: Defined vs. undefined

by misterb101 (Sexton)
on Feb 10, 2006 at 15:57 UTC ( #529393=note: print w/replies, xml ) Need Help??

in reply to Re: Defined vs. undefined
in thread Defined vs. undefined

xdg, you're right, but then the question is why one would use a variable that is potentially undefined??
for this, testing whether the hash has values is better like in muntfish's solution.
But if you go that route, why don't you directly test if (scalar(%hash)!=0) { ....??
using a hash in scalar context gives 0 for a empty hash and the number of used entries for a nonempty hash.
my %hash = (1=>2,3=>4);print "scalarval=".scalar(%hash); => 2/8


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Re^3: Defined vs. undefined
by xdg (Monsignor) on Feb 10, 2006 at 17:27 UTC
    xdg, you're right, but...

    I didn't recommending that approach. I just answered the original question. Sometimes a limited answer is the one that people need in order to make their own discoveries. (See "Baby" Perl versus "Bad" Perl.)


    Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.

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