[squeak-dev] Properties of "<" in SortedCollection>>#sortBlock -
reflexive, symmetric, transitive required?
matthias.berth at googlemail.com
Sun May 4 16:47:29 UTC 2008
certainly you would not want all three of these, that would give an
equivalence relation :-)
I think that SortedCollection>>should: a precede: b is the crucial
method here, it uses <= as the default sorting relation. Another
interesting method for you might be sortTopologically.
On Sun, May 4, 2008 at 12:39 PM, Milan Zimmermann
<milan.zimmermann at sympatico.ca> wrote:
> Is the "<" opertaion in SortedCollection>>#sortBlock required to be reflexive,
> symmetric and transitive ?
> I have a set of classes with known parent class and try to sort them so they
> install into the image in the right order (parent first). The obvious "<"
> implementation of parent < child may not be enough because it not transitive
> unless I do some more sophisticated manipulation (I only immediate descendant
> The sortBlock documentation provides no help on this...
> Thanks Milan
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