[Rd] Why is there no within.environment function?

[Gabor Grothendieck]

On Wed, Mar 21, 2012 at 5:51 PM, Richard Cotton <richierocks at gmail.com> wrote:
> If I want to assign some variables into an environment, it seems
> natural to do something like
>
> e <- new.env()
> within(e,
>    {
>      x <- 1:5
>      y <- runif(5)
>    }
> )
>
> This throws an error, since within.environment doesn't exist.  I
> realise I can work around it using
>

'with' already does that:

e <- new.env()
with(e, {
   x <- 1.5
   y <- runif(5)
})
ls(e) # lists x and y

Also since proto objects are environments this works:

library(proto)
p <- proto(x = 1.5, y = runif(5))
p$ls() # lists x and y

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