Set operations on object attributes question
duane.kaufman at gmail.com
Tue Oct 23 15:47:06 CEST 2007
I have run into something I would like to do, but am not sure how to
code it up. I would like to perform 'set-like' operations (union,
intersection, etc) on a set of objects, but have the set operations
based on an attribute of the object, rather than the whole object.
For instance, say I have (pseudo-code):
LoTuples1 = [(1,1,0),(1,2,1),(1,3,3)]
LoTuples2 = [(2,1,3),(2,2,4),(2,3,2)]
What I would like to be able to do is:
Set3 = Set1union(Set2)
Set3.intersection(Set2, <use object>)
How can one do this operation?
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