Hello GAP forum,
Is it possible to define a function that returns, say, an integer, but
changes a permutation given as argument, as a side effect.
Something like this:
testperm := function(s)
local i;
i := 1;
s := s^-1;
Print(s,"\n");
return i;
end;
but that when running it like this...
gap> a:=(1,2,3);
(1,2,3)
gap> testperm(a);
(1,3,2)
1
gap> a;
(1,2,3)
...actually changes the permutation a.
Thanks in advance,
Rafael
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