[Swift-devel] Problem with iterate

[Ben Clifford]

> There's also the list comprehension way with C-like syntax, which
> involves no array indices:

yeah, I had forgotten about that. It seems to keep the shape a bit better.

This is the same as your example (if I understand your example), in 
Haskell:

a = do
  p <- [1,2,3]
  return $ do
     q <- [10,20,30]
     return (p + q)

main = print a

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