L: all the time, especially in teaching. The beginners tend to get rank and boxing level confused. The recurring question is "what should you apply this verb on", and if the answer is 'k-cells', you use "k, while if it is 'on the contents of innermost boxes', you use L:0. Last year we had a project (analyzing the text of Hamlet) that ended up with a level-3 boxed array, and L:2, L:1, and L:0 were all meaningful, depending on whether you wanted to work on a word, a line, or a speech.

&.> is usually better supported in the interpreter, so I don't use L:0 in my own code unless the boxing is heterogeneous.

S: I don't use much.

L. is also rare.

{:: is indispensable when you need it. > 1 { > 2 { y is just harder to read than (2;1) {:: y . It's a pity that 0 {:: scalar fails, or I would use {:: more.

Henry Rich

On 1/13/2013 1:09 AM, km wrote:
Have you used members of this family?  What for?  --Kip Murray

Sent from my iPad
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