I haven't looked at it, but I am familiar with it. I program in J and a famous story is how Arthur Whitney visited Ken Iverson and Kiln Farm and wrote an interp

I haven't looked at it, but I am familiar with it. I program in J and a famous story is how Arthur Whitney visited Ken Iverson and Kiln Farm and wrote an interpreter for J in terse C[1]. John Earnest is definitely a fan of array languages for sure, so I am not surprised. [1] https://code.jsoftware.com/wiki/Essays/Incunabulum https://code.jsoftware.com/wiki/Essays/Incunabulum