[Haskell-cafe] Co-arbitrary

[Donald Bruce Stewart]

joelr1:
> Would someone kindly explain why we need co-arbitrary in QuickCheck  
> and how to define it?

Generating random function generators.

A nice explanation was given recently on the programming subreddit:

    "The CoArbitrary class continues to confuse me"
    http://programming.reddit.com/info/1mcu8/comments/c1md04

> Detailed examples would be awesome!
> 
> I would be willing to paste an in-depth explanation on my wall and  
> keep it forever.

-- Don