Re: Lists composed of equal number and kind of elements

[Emanuel Berg <embe8573@student.uu.se>]

John Mastro <john.b.mastro@gmail.com> writes:

>> Anyway, to answer your question, try this: (defun
>> set-equal (list-1 list-2) (and (null
>> (cl-set-exclusive-or list-1 list-2)) (= (length
>> list-1) (length list-2)) )) Note: Depending what is
>> deemed faster and/or more likely to tell the correct
>> state, the order of the `and' arguments could be
>> reversed...
>
> If `cl-set-exclusive-or' returns nil, aren't the two
> lists guaranteed to have the same length?

No: (cl-set-exclusive-or '(1) '(1 1)) ; nil

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