Created
October 10, 2014 15:38
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Writer monad
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| let (>>=) (i1, s1) k = | |
| let i2, s2 = k i1 | |
| (i2, sprintf "%s\r%s" s1 s2) | |
| let half i = | |
| let half = i / 2 | |
| (half, sprintf "half of %i is %i" i half) | |
| half 8 >>= half >>= half |> snd |> printfn "%s" |
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