On 08/22/2016 09:02 AM, Joe Quinn wrote:
> On 8/22/2016 8:54 AM, Michael Orlitzky wrote:
>> On 08/21/2016 03:22 PM, Damian wrote:
>>> There is no such set B, as it would contain itself.
>> The empty set contains itself.
> That's an easy mistake to make. The empty set is {}, the set that
> contains only the empty set is {{}}. Sets are discrete elements that
> don't get "flattened".
>
> In perl syntactic lists do get flattened though, which leads to some fun
> times. You can do silly things like @concatenated = (@listOne, @listTwo).
"Contains" in the context of sets means "is a superset of" =)
(I'm just being pedantic, I don't actually have a point.)
