Support of algebraic operations on sets
siguctua at gmail.com
Sat Jun 16 14:13:34 UTC 2007
On 16/06/07, Ron Teitelbaum <Ron at usmedrec.com> wrote:
> I'm still trying to follow this conversation, is your argument simply that
> #= should be implemented in dictionary only comparing keys and not values,
> so that
> (Dictionary at: #a put: 1) = (Dictionary at: #a put: 2)
> Which means that
> | dict1 dict2 result1 result2 |
> dict1 := Dictionary new.
> dict2 := Dictionary new.
> dict1 at: 1 put: 5.
> dict2 at: 1 put: 6.
> result1 := dict1 union: dict2.
> result2 := dict2 union: dict1.
> result1 = #(1->6) = result2 = #(1->5)
> result1 includes: #(1->5) = true
I think you meant:
#( a->b ) to be just (a->b) everywhere, because #(1->5) is the array
with 3 elements in my squeak.. not association.
> #(1->6) = #(1->5)?
And then yes. As you can see, then everything is at right places.
> Ron Teitelbaum
> > sig wrote:
> > To what i propose is to be the following:
> > SigAssociation methodsFor: 'comparision'
> > = argv
> > ^ key = argv key
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