[MLton-user] Extended Basis Library: iterating thunks

[Geoffrey Alan Washburn]

Vesa Karvonen wrote:
> OTOH, the type of repeatWith makes me think of tabulate.
> Hmm... A simpler alternative could be Effect.tabulate
>
>  val tabulate : Int.t -> Int.t Effect.t
>
> So, given
>
>  ef : 'a Effect.t
>  i2a : Int.t -> 'a
>
> for some 'a, one could say
>
>  tabulate n (ef o i2a)
>
> instead of
>
>  repeatWith ef n i2a

Okay, I decided to go with just tabulate for now.  However, shouldn't 
its type be

    val tabulate : Int.t -> Int.t Effect.t Effect.t

or

    val tabulate : Int.t Effect.t -> Int.t Effect.t

?

I went with the former because it ought to be more useful for partial 
applications.

> Also note the existing function Basic.repeat:
>
>   val repeat : 'a UnOp.t -> Int.t -> 'a UnOp.t

  I had seen that but it didn't seem like the best solution at the time.

-- 
[Geoff Washburn|geoffw at cis.upenn.edu|http://www.cis.upenn.edu/~geoffw/]

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