Pascal Jasmin wrotete:
> I would suggest that the distinction between (0 n $ y1) and
> 0 0 $ y1 never provides any value and always "gets in the way".

If you are only building up lists using , that might be true. 
However, if you are manipulating collections using other operations,
such as {. then this is not at all true.

 

For what it's worth, here's an identity adjective:
   ident=:1 :'a:1 :(u b.1)'

For example:
   +ident 99
0
   +ident i. 9 9
0 0 0 0 0 0 0 0 0

-- 
Raul


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