[Haskell-beginners] How would you write...
John M. Dlugosz
ngnr63q02 at sneakemail.com
Tue Apr 22 18:30:15 UTC 2014
On 4/22/2014 3:47 AM, Frerich Raabe wrote:
> chain1 = [ translate x y $ color red $ Circle r | i <- [1..10], (x,y,r) <- pappus 100 i ]
> would be one way to do what you want.
Yes, that's along the lines of what I was thinking — the 1..10 needs to be bound by itself
to trigger the looping behavior, but didn't know how to then continue to generate (x,y,r).
I thought the comma there was followed by a "guard", which constrains which values of i
are taken or skipped. Ah, you have a <- there too. Hmm, but normally a second <- is
another iteration that's done first/loops faster. So what's the syntax here? I must be
getting things mixed up.
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