[Jprogramming] complex indexing for rank 2

[David Lambert]

Because tables are a common data structure, is there interest in 
shorthand indexing for them?

   (<+.2j5) { i.8 8
21

Note 'concept'
   let the index be
   (<2j5) { rank 2 or higher

   or even
   2j5 { rank 2 or higher

   (<+.2j5){ i.3#9   NB. -: 2j5 { i.3#9
207 208 209 210 211 212 213 214 215

I haven't considered amend or fetch, although the idea seems applicable.

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