[R] repeat { readline() }

[justin bem]

--- Henrik Bengtsson <hb at maths.lth.se> a écrit :

> Hi.
> 
> Using Rterm v2.2.1 on WinXP, is there a way to
> interrupt a call like
> 
>   repeat { readline() }
> 
> without killing the Command window?  Ctrl+C is not
> interrupting the loop:

To interupt the loop add and condition for a break
like this :
if () break



> 
> R : Copyright 2006, The R Foundation for Statistical
> Computing
> Version 2.2.1 Patched (2006-01-01 r36947)
> <snip></snip>
> 
>  > repeat { readline() }
> ^C
> ^C
> ^C
> ^C
> 
> On Unix it works.  The problem seems to get the
> interrupt signal to 
> "occur" outside the readline() call so that "repeat"
> is interrupted. Doing
> 
> repeat { readline(); Sys.sleep(3) }
> 
> and it is likely that can generate an interrupt
> signal outside readline().
> 
> It seem like readline()/readLines(n=1) or an
> underlying method catches 
> the interrupt signal quietly and just waits for a
> symbol to come 
> through.  Try readline() by itself and press Ctrl+C.
>  Maybe this is a 
> property of the Windows Command terminal, I don't
> know, but is it a 
> wanted feature and are R core aware of it?  Note
> that, in Rgui it is 
> possible to interrupting such a loop by pressing
> ESC.
> 
> Cheers
> 
> Henrik
> 
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