From: Maurice Codik <maurice.codik@...>
Date: 2006-05-18T23:54:07+09:00
Subject: Re: [OT] Partial functions?

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This feature is very similar to currying:
http://en.wikipedia.org/wiki/Currying which is common in many functional
languages (ex, ML automatically curries for you).

I can't really think of a good usecase off the top of my head, but searchin=
g
around for currying examples may help.

Maurice

On 5/18/06, Berger, Daniel <Daniel.Berger@qwest.com> wrote:
>
> Hi all,
>
> I'm trying to understand a new feature of Python 2.5 (PEP 309) called
> "partial functions".  Here's the Python example I pulled from Vincent
> Foley's blog:
>
> import functional
>
> def multiply(x, y):
>   return x * y
>
> multiply_by_3 =3D functional.partial(multiply, 3)
>
> multiply_by_3(4) #=3D> Will return 12
>
> I understand what it's doing, I just don't understand what purpose of
> partial functions would be.  Can someone provide a use case for me?
>
> Also, can/should we do this in Ruby?
>
> Regards,
>
> Dan
>
>
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