GNU APL replaces a variable's contents when taking the prototype with 0⍴⊂.
Note also that a second variable assigned to the original variable is also
affected.
______ _ __ __ __ ___ ____ __
/ ____// | / // / / / / | / __ \ / /
/ / __ / |/ // / / / / /| | / /_/ // /
/ /_/ // /| // /_/ / / ___ | / ____// /___
\____//_/ |_/ \____/ /_/ |_|/_/ /_____/
Welcome to GNU APL version 1.8 / SVN: 1646
Copyright (C) 2008-2021 Dr. Jürgen Sauermann
Banner by FIGlet: www.figlet.org
This program comes with ABSOLUTELY NO WARRANTY;
for details run: /usr/local/bin/apl --gpl.
This program is free software, and you are welcome to redistribute it
according to the GNU Public License (GPL) version 3 or later.
data←1 2 3 ('ABCDE' (10 20 30 40 50 60 70))
save←data
⊃data save
1 2 3 ABCDE 10 20 30 40 50 60 70
1 2 3 ABCDE 10 20 30 40 50 60 70
⍴⊂data
⊃data save
1 2 3 ABCDE 10 20 30 40 50 60 70
1 2 3 ABCDE 10 20 30 40 50 60 70
0⍴⊂data
⊃data save
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
Thank you for help.
-- To believe is to die.
