In order to compare a noun with itself right-shifted 1 place, they
wrote the following:
test=.~:~1&|.
But from my tests, getting rid of dyadic flip:
test2=.~:1&|.
Leads to the same output.
Why do you think the authors used ~ to flip the arguments to ~: (once
it serves as the "join" of the
hook-which-turns-into-a-fork-with-the-noun-unadulterated-as-the-left-noun-of-the-fork)
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