Arc Forumnew | comments | leaders | submitlogin
1 point by Pauan 4896 days ago | link | parent

Yes! I've written shell scripts in Arc, and I've noticed that the Unix concept of pipes (and especially the syntax for them) is very elegant and concise.

But why not just make it a binary operator, like in Unix?

  x | y | z
  (z (x y))
I'll note that this would solve a problem I've been having... In particular, notice this pattern:

  (w/foo 1 (w/bar 2 (qux)))
The above could be written as this, instead:

  (qux) | w/bar 2 | w/foo 1
Hm... perhaps the bars should be reversed, so it would be like this:

  w/foo 1 | w/bar 2 | (qux)
I've had some situations where I kept wishing I had some syntax to make them shorter, but I wasn't sure exactly what kind of syntax would help...


1 point by akkartik 4896 days ago | link

..why not just make it a binary operator..?

Hmm, you mean an infix operator, right? I'm not sure how to fit an infix operator into an otherwise prefix language. I'm sure lots of questions arise. Operator precedence, where the right-hand arg terminates. If there's a simple model that answers those questions well that would be great.

-----

1 point by Pauan 4895 days ago | link

Yes. One potential solution is the curly infix system described here (scroll down a bit):

http://www.dwheeler.com/readable/sweet-expressions.html

Though that does add two extra characters:

  {x | y | z}

-----

1 point by akkartik 4895 days ago | link

Ah, I keep losing that page, thanks!

But for this particular case I'd rather just add an extra '|' and make it all prefix.

-----