Re: Trouble passing hash into function

SUMMARY: How do I take a hash being passed into a function as @_ and convert it to a hash I can do something with, like %myhash?

If that's what you really want to do, you don't have to do very much at all

hashy( %x );

sub hashy {
  my %myhash = @_
}
[download]

That should do what you want.

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Re^2: Trouble passing hash into function by dbonneville (Acolyte) on Sep 05, 2007 at 23:02 UTC
That's what I thought would work but here is what's happening: `sub test_parser { use Data::Dumper; #print Dumper(@_); my %test = @_; print Dumper(%test); }` [download] If I comment out the second print and uncomment the first print, the @_ dumps fine. When I try to set %test, I get this error: `Reference found where even-sized list expected at Debugger.pm line 8.` [download] I'm sending the hash from a master .pl file into the function like this: `Debugger::test_parser(\%competitors_master);` [download] What else could be wrong? Thanks, Doug	[reply] [d/l] [select]
Re^3: Trouble passing hash into function by GrandFather (Saint) on Sep 05, 2007 at 23:13 UTC
You are passing a hash reference, not a hash (which gets flattened into a list). The first dump works as expected because it sees a list containing one element which is the reference to the hash you passed in. The `my %test = @_;` and generates an error because @_ contains only one element - the reference to the hash. Instead you should `my $test = shift;` and work with the reference. DWIM is Perl's answer to Gödel	[reply] [d/l] [select]