Comparing collections, default behavior?

Since Collection includes #difference: protocol,

i just thought that the default equality could be expressed like following:

Collection>>= otherCollection
   ^ (self  difference: otherCollection) isEmpty

In other words, if two things having no differences, then they are equal. No? :)


--
Best regards,
Igor Stasenko AKA sig.

On 4 févr. 2011, at 17:06, Igor Stasenko wrote:

> Since Collection includes #difference: protocol,
>
> i just thought that the default equality could be expressed like following:
>
> Collection>>= otherCollection
>   ^ (self  difference: otherCollection) isEmpty
>
> In other words, if two things having no differences, then they are equal. No? :)
>
Need to check the species too.
I believe an array is different from a set even if they contain the same elements.

Noury