The sort command allows for user defined orderings. #Here is a user defined ordering ord := function(x,y) return x[1]<=y[1]; end;
# A list lst := [[3,2,1],[2,5,1]];; # Sort using the user defined ordering Sort(lst,ord); # See the result lst; #[ [ 2, 5, 1 ], [ 3, 2, 1 ] ] Sort([[3,2],1,[2,5,1], ord); Robert F. Morse On Fri, Sep 14, 2012 at 3:45 PM, Ha T. Lam <hat...@gmail.com> wrote: > Dear GAP forum, > > I have objects which are lists of 3 elements. I want to keep them sorted > according to the first elements on the lists, which are integers, but I'm > not sure what to use as the data structure so that I can make use of GAP's > sorting algorithm. Is there anyway to use nested lists in this case? I > looked into Hash, but that only accept non-negative integers. > > Do you have any advise? > > Best regards, > > Ha T. Lam > _______________________________________________ > 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
