On 31.05.22 22:42, Ralf Hemmecke wrote:
OK. then the design decision is:
If i=1.. or i=1..e describes the indices of a given stream s and u is a
universal segment of the form a..b by c, then s(u) should be
[s.idx for idx in i | idx in expand(u)]
with the obvious meaning of the condition 'idx in expand(u)'.
Oh I should have rather exchanged u and i above. That is (informally)
[s.idx for idx in u | idx in expand(i)]
because that would correctly give the order in which the elements are
returned even in the case of c<0 or if u = ((a..) by c).
I now even think that this should equally apply to Stream and List.
Ralf
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