>
> I was thinking ...
>
> 5 { { 1 2 } { 3 4 } } concat member?
>
Sure, that will work, however if you are aiming for performance you may not
want to create the intermediate array before checking membership.
There is a more general "nested search" technique that is deep-member? in
sequences.deep, but it is probably not as efficient as the original [
member? ] with any? version:
IN: scratchpad 5 { { 1 2 } { 3 4 } } deep-member? .
f
IN: scratchpad 3 { { 1 2 } { 3 4 } } deep-member? .
t
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