monadic not equal ≠ nub sieve / unique mask

[roytobin]

Hi, FYI (space permitting) monadic not equal ≠ nub sieve / unique mask
is now implemented in GNU APL 1.9. Cheers,

           ≠1 2 3 2 7 1 13 3 3 2 1
     1 1 1 0 1 0 1 0 0 0 0

ref: r1845 | *** | 2025-03-01 09:39:20 -0800 (Sat, 01 Mar 2025) | 1 line
add nub sieve (monadic ≠)

[jpellegrini]

Ok, I'll try to add it!