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).

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