[Rd] should the text for RIGHT_ASSIGN be -> in getParseData()?

[William Dunlap]

> But up-arrow, ctrl-A then "z <-" is not much less convenient, is it?

I didn't know that ctrl-A would bring me to the start of the line, nor
that ctrl-E would bring me to the end.  Thanks.

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com


> -----Original Message-----
> From: peter dalgaard [mailto:pdalgd at gmail.com]
> Sent: Friday, July 05, 2013 11:25 AM
> To: William Dunlap
> Cc: Barry Rowlingson; R-devel
> Subject: Re: [Rd] should the text for RIGHT_ASSIGN be -> in getParseData()?
> 
> 
> On Jul 5, 2013, at 18:59 , William Dunlap wrote:
> 
> >> Is there any reason right-assign with "->" still exists? How much
> >> code on CRAN uses it, and how trivially could it be excised?
> >
> > I use '->' a lot when doing interactive work.  I often first run a command
> > to see its printed output then decide that I had better save its value.
> > The up-arrow key gives me the previous command line with the cursor placed at the
> > end of the line so adding '-> z' at the end of the line is convenient.
> > (Not using the up-arrow key and doing 'z <- .Last.value' also works, but
> > I don't like its context sensitivity.)
> 
> But up-arrow, ctrl-A then "z <-" is not much less convenient, is it?
> 
> I have used in with multi-line input, occasionally, though. As in
> 
> replicate(10000, {
>    ysim <- rbinom(length(p), n, p)
>    glm(cbind(ysim, n - ysim) ~ x, binomial)$deviance
> })
> 
> ... and then you realize that you probably don't want to look at 10000 simulated
> deviances and add "-> simDev".
> 
> >
> > I never use '->' when writing code in a file, so you would have to search
> > my .Rhistory files, not my *.R files, for evidence of its usefulness to me.
> >
> > Bill Dunlap
> > Spotfire, TIBCO Software
> > wdunlap tibco.com
> >
> >
> >> -----Original Message-----
> >> From: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-project.org] On
> Behalf
> >> Of Barry Rowlingson
> >> Sent: Friday, July 05, 2013 9:29 AM
> >> To: Duncan Murdoch
> >> Cc: R-devel
> >> Subject: Re: [Rd] should the text for RIGHT_ASSIGN be -> in getParseData()?
> >>
> >> On Fri, Jul 5, 2013 at 12:57 PM, Duncan Murdoch
> >> <murdoch.duncan at gmail.com> wrote:
> >>
> >>> R itself doesn't make use of the text column, it's for display of code
> >>> by highlighters etc.  So if anyone does assume text is a function name,
> >>> it's their bug, not ours.  In fact, the bug is already there, because
> >>> there is actually one other example which was being parsed properly,
> >>> "**" is translated to "^".  There's no `**` function, but 2**3 works.
> >>
> >> Is there any reason right-assign with "->" still exists? How much
> >> code on CRAN uses it, and how trivially could it be excised? Can we
> >> also have 'up assign'  and "down assign" so I can do:
> >>
> >>>    3
> >>> x -^
> >>> x -v
> >>>    4
> >>
> >> - they make just as much sense.
> >>
> >> Okay, lets see all the edge cases.....
> >>
> >> Barry
> >>
> >> ______________________________________________
> >> R-devel at r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-devel
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com
> 
> 
> 
> 
> 
> 
>