Up you CAD game with Advanced Selection techniques What you will learn: 00:00 - Expected Knowledge 00:06 - What You Will Learn 00:16 - QSelect aka Quick Select 01:44 - Select…

I have a list of lists I would like to sort by two entries. I once had a need to do a sort and the forum helped a lot. So, I thought I would ask again. I thought I would first attempt the code I was once given and as I was studying how it worked and how I could use it, I found that vl-sort will remove duplicate items. And then someone posted code in CADTutor that Kent1Cooper had wrote using mapcar to retain the duplicates. His code is slightly above my abilities. My list is: (setq LST '(((1 . "T1") (2 . "l-cre-non.dwg") (3 . 4) (4 . "CREPE MYRTLE") (5 . 8) (6 . 1)) ((1 . "T2") (2 . "l-mag-non.dwg") (3 . 12) (4 . "MAGNOLIA") (5 . 24) (6 . 1)) ((1 . "T3") (2 . "l-oak-non.dwg") (3 . 10) (4 . "OAK") (5 . 20) (6 . 1)) ((1 . "T4") (2 . "l-app-non.dwg") (3 . 12) (4 . "APPLE") (5 . 24) (6 . 1)) ((1 . "T5") (2 . "l-app-non.dwg") (3 . 8) (4 . "APPLE") (5 . 16) (6 . 2)) )) I would like to first sort by association 4 (cdr (assoc 4 LST)), then by association 3 (cdr (assoc 3 LST)) The list should be returned as: (setq LST '(((1 . "T5") (2 . "l-app-non.dwg") (3 . 8) (4 . "APPLE") (5 . 16) (6 . 2)) ((1 . "T4") (2 . "l-app-non.dwg") (3 . 12) (4 . "APPLE") (5 . 24) (6 . 1)) ((1 . "T1") (2 . "l-cre-non.dwg") (3 . 4) (4 . "CREPE MYRTLE") (5 . 8) (6 . 1)) ((1 . "T2") (2 . "l-mag-non.dwg") (3 . 12) (4 . "MAGNOLIA") (5 . 24) (6 . 1)) ((1 . "T3") (2 . "l-oak-non.dwg") (3 . 10) (4 . "OAK") (5 . 20) (6 . 1)) )) I would appreciate any help given. Thanks.

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