> (%o2) %union([x = - 2], [x = 1])
> what should I do with %union()...? I want to handle the return as usual...
Functionally a %union object isn't all that much different from a list or a finite set. The functions first, second, .. extract members of a %union object. And
it's possible to loop over the members of a %union object:
(%i3) l : %union(u,n,k);
(%o3) %union(k,n,u)
(%i4) for lk in l do print(lk);
k
n
u
If you prefer lists over %union objects, simply substitute "[" for %union:
(%i2) subst('%union = "[", %union([x=1],[x=2]));
(%o2) [[x=1],[x=2]]
--Barton