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Asked: May 10, 20262026-05-10T17:21:07+00:00 2026-05-10T17:21:07+00:00

I need to sort tuples according to the second element of each tuple but

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I need to sort tuples according to the second element of each tuple but apparently usort/1 only works with the first element. So I have to swap the elements, usort them and swap back.Is there an easier way?Also is there a way to sort in descending order (I know sorting and reversing can be done, but just want to know).

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  1. 2026-05-10T17:21:07+00:00Added an answer on May 10, 2026 at 5:21 pm

    Have you tried keysort/2 function (or its counterpart ukeysort/2)?

    > lists:reverse(lists:keysort(2, [{a,2}, {b,1}, {c, 3}])). [{c,3},{a,2},{b,1}] 

    If you don’t sort very big lists this is probably the most readable solution you can get.

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