R devel - Nov 2007 - Curry: proposed new functional programming, er, function.

Hi all (especially R-core) I suppose,

With the introduction of the new functional programming functions into
base I thought I'd ask for a Curry() function. I use a simple one that
looks this:

Curry = function(FUN,...) { .orig = list(...);function(...)
do.call(FUN,c(.orig,list(...))) }

This comes in really handy when using say, heatmap():

heatmap(mydata,hclustfun=Curry(hclust,method="average"))

or other functions where there are ... arguments, but it's not clear
where they should end up.

-- 
Byron Ellis (byron.ellis at gmail.com)
"Oook" -- The Librarian

I thought I might bring this up again - it now seems like Curry would
be a natural fit with Reduce, Filter, Find, Map, Negate and Position.
Any chance we might see this in a future version of R?

Hadley

On Thu, Nov 1, 2007 at 2:00 PM, Byron Ellis <byron.ellis at gmail.com>
wrote:
> Hi all (especially R-core) I suppose,
>
> With the introduction of the new functional programming functions into
> base I thought I'd ask for a Curry() function. I use a simple one that
> looks this:
>
> Curry = function(FUN,...) { .orig = list(...);function(...)
> do.call(FUN,c(.orig,list(...))) }
>
> This comes in really handy when using say, heatmap():
>
> heatmap(mydata,hclustfun=Curry(hclust,method="average"))
>
> or other functions where there are ... arguments, but it's not clear
> where they should end up.
>
> --
> Byron Ellis (byron.ellis at gmail.com)
> "Oook" -- The Librarian
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>


-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/

Byron Ellis-2 wrote:
> 
> Hi all (especially R-core) I suppose,
> 
> With the introduction of the new functional programming functions into
> base I thought I'd ask for a Curry() function. I use a simple one that
> looks this:
> 
> Curry = function(FUN,...) { .orig = list(...);function(...)
> do.call(FUN,c(.orig,list(...))) }
> 
> ...
> 
> 
I would like to see this as well---it is one of the functional programming
constructs I really miss in R after playing with languages like Haskell.

Currently, the only Curry implementation I know of is in the roxygen package
which is kind of a weird dependency to install just for this one function.

-Charlie

-----
Charlie Sharpsteen
Undergraduate-- Environmental Resources Engineering
Humboldt State University
--
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On Wed, May 4, 2011 at 1:11 PM, Sharpie <chuck at sharpsteen.net>
wrote:
> Currently, the only Curry implementation I know of is in the roxygen
package
> which is kind of a weird dependency to install just for this one function.
>
Not entirely comparable but the proto package supports currying of
proto arguments. For example, p$ls returns an
"instantiatedProtoMethod" which is an S3 subclass of
"function" that
is like the original method but with the first argument filled in:
> library(proto)
> p <- proto(x = 1)
> p$ls()
[1] "x"


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