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4 points by conanite 5800 days ago | link | parent

True, [_] is one of those radical shortcuts that improves readability rather than obfuscates. Thank you.

As for up-arrow, I get "^[[A", so I haven't enjoyed the REPL as much as I ought to. I'm on a mac. Does anyone know a way to fix this?



5 points by absz 5800 days ago | link

I'm on a Mac too; the trick is that you need mzscheme's readline library. In your ~/.arcshrc, put the line

  ($ (dynamic-require '(lib "rep.ss" "readline") (zero? 1)))
, and then you should have no problem.

(As a side note, you need to use (zero? 1) instead of #f because Arc turns #f into nil.)

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