Re^2: Let's unite sets

Would your union works for objects?

my @unique = union{ $_[0]->isSameNode } 
                [ qw( list of xml nodes ) ], 
                [ qw( other list of xml nodes ) ] 
                #unique node list
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Edited by castaway - added code tags

Comment on Re^2: Let's unite sets Download Code

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Re^3: Let's unite sets by tlm (Prior) on Mar 28, 2005 at 22:04 UTC
Certainly. Notice that the hash keys are "stringified objects", which include a memory locations, like this: `% perl -le 'print bless +{}, "Foo"' Foo=HASH(0x814cbb8)` [download] So objects are considered equal only if their "stringifications" match. You still recover the original object from the corresponding hash value. the lowliest monk	[reply] [d/l]
Re^3: Let's unite sets by jdporter (Paladin) on Mar 29, 2005 at 01:33 UTC
It would, and does. I encourage you to try it for yourself. I also encourage you to look at existing modules, such as Set::Object, which generally do a lot more than just union.	[reply]
Re^4: Let's unite sets by songahji (Friar) on Mar 29, 2005 at 21:23 UTC
Ok it works for objects. Then how about reference object?	[reply]
Re^5: Let's unite sets by jdporter (Paladin) on Mar 29, 2005 at 22:53 UTC
I don't know what you're asking, since objects "are" references in perl. Why don't you try it yourself, on a test you think is meaningful. Then, if it doesn't work, show us what you did and what you expected to happen that didn't happen.	[reply]