Message-ID: <f6c00f37-bd3c-131e-7c87-5147a363a48b@dewey.myzen.co.uk>
Date: 2021-02-09T10:29:32Z
From: Michael Dewey
Subject: readline in function call with space in prompt.
In-Reply-To: <24610.22509.310508.96260@stat.math.ethz.ch>
The function test as defined below by Jeremie works as I would have
expected for me on Windows so I am unable to replicate the problem there.
R version 4.0.3 (2020-10-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19041)
Matrix products: default
locale:
[1] LC_COLLATE=English_United Kingdom.1252
[2] LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_4.0.3
On 09/02/2021 09:37, Martin Maechler wrote:
>>>>>> Jeremie Juste
>>>>>> on Mon, 08 Feb 2021 14:28:33 +0100 writes:
>
> > Hello,
> > I have noticed a behavior that I don't understand. When I call the
> > following function from the prompt.
> > test <- function(){
> > a <- readline("selection: ")
> > a
> > }
>
> >> test()
> >> selection: |
> > I can only type one character and the readline function exits before I can
> > press enter.
>
> > however
>
> > test1 <- function(){
> > a <- readline("selection:")
> > a
> > }
> >> test1()
> >> selection:|
> > works as expected.
> >> selection: abc[Ret]
>
> > However calling directly readline with a space in the prompt does what I
> > would expect.
>
> >> a <- readline("selection: ")
> >> selection: abc[Ret]
> >> a
> >> "abc"
>
> > It is the expected behavior or am I missing something?
>
> > Best regards,
> > Jeremie
> > --
> > Jeremie Juste
> >> R version 4.0.3 (2020-10-10)
>
> Given that the above works fine in Linux (for Jim Lemon and Rolf Turner),
>
> could you tell us *how* you use R?
> In the (Windows) RGui or from Rstudio or ESS or yet another way?
>
> Usually the UI (user interface) should not matter, but rather
> the R version etc.
> But the UI may be important for a function like readline()
> which does UI ..
>
> Martin
>
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>
--
Michael
http://www.dewey.myzen.co.uk/home.html