[rscho]

Regarding that, I am surprised that a 'more limited APL' lacking this ambiguity and opening the way to easy compilation never appeared (to my knowledge). I essentially use J for data wrangling and pretty much never use the metaprogramming features of the language (". and the like). An 'APL NumPy' would be quite nice, IMO.

[beagle3]

K can be parsed. Even Q (the English version of K) can be parsed if you consider the prelude a part of the language (rather than part of the runtime environment).