Re: Using an undefined value as a hashref

The correct usage is:

#!/usr/bin/perl -w

use Data::Dumper;

{
  my $hashref = {'foo' => "bar"};

  print Dumper($hashref);
}
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Refer to my for more details.

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Re^2: Using an undefined value as a hashref by talexb (Chancellor) on Sep 09, 2005 at 21:10 UTC
Thanks, but that's not my point. I'm trying to assign a value to an element of a hash, and I want to pass around a hashref. So I really do want to set the `foo` element of `hashref` to the value `bar`. And Perl will let me do that if I predeclare the hashref and then set the value, but I can't do it all in one shot. I didn't realize that, and spent some time trying to track down the problem -- so now I'd like to understand what part of Perl syntax I misunderstand. Or what black hole I just fell into. Alex / talexb / Toronto "Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds	[reply] [d/l] [select]

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Re^2: Using an undefined value as a hashref
by talexb (Chancellor) on Sep 09, 2005 at 21:10 UTC

Thanks, but that's not my point.

I'm trying to assign a value to an element of a hash, and I want to pass around a hashref. So I really do want to set the foo element of hashref to the value bar. And Perl will let me do that if I predeclare the hashref and then set the value, but I can't do it all in one shot.

I didn't realize that, and spent some time trying to track down the problem -- so now I'd like to understand what part of Perl syntax I misunderstand. Or what black hole I just fell into.

Alex / talexb / Toronto

"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

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