SortBy¶ Sorts elements of a list according to a function. $ wo 'SortBy[{3, 1, 2}, # &]' {1, 2, 3} A list of functions sorts by each criterion in turn. $ wo 'SortBy[{1, 2, 3, 4}, {Mod[#, 2] &, # &}]' {2, 4, 1, 3}