This is because when you add the element e, you actually add a pointer to it. Hence you change the value but the pointer does not change.
The trick is to do Add(L, ShallowCopy(e)); which really does the addition that you want. >> Dear GAP Forum, >> >> consider this small GAP code (I hope it is minimal somehow): >> >> L:=[]; >> e:=[1]; >> for s in [[1],[0]] do >> e[1]:=s[1]; >> Add(L,e); >> od; >> >> After that the list L should be [ [ 1 ], [ 0 ] ]. However GAP gives [ [ >> 0 ], [ 0 ] ]. I'm not quite sure if this is a bug. It seems to me that >> the Add function only adds a pointer or something similar. Note that the >> code works as expected if one uses e:=1 and so on (without additional >> square brackets). By the way I'm using GAP 4.4.12. >> >> Thanks for clarification, >> Benjamin Sambale >> >> _______________________________________________ >> Forum mailing list >> Forum@mail.gap-system.org >> http://mail.gap-system.org/mailman/listinfo/forum _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum
