>>>>> Ralf Stubner >>>>> on Mon, 28 May 2018 12:13:57 +0200 writes:
> On 28.05.2018 11:07, Gábor Csárdi wrote: >> stdin() is not the same as file("stdin"), see the note in ?stdin. Of course it is not the same, otherwise using one for the other had no effect, but you are right: it is *NOT* a solution to the problem > In particular stdin() works in an interactive session but not when R -f > / Rscript is used, since it does not wait for the user to input anything: > $ R -f readLines.R > R version 3.5.0 (2018-04-23) -- "Joy in Playing" > Copyright (C) 2018 The R Foundation for Statistical Computing > Platform: x86_64-pc-linux-gnu (64-bit) > [...] >> create_matrix <- function() { > + cat("Write the numbers of vertices: ") > + user_input <- readLines(stdin(), n=1) > + user_input <- as.numeric(user_input) > + print(user_input) > + } >> create_matrix() > Write the numbers of vertices: numeric(0) >> oh dear... yes, that is true .. >>>>>>>> Martin Maechler >>>>>>>> on Mon, 28 May 2018 10:28:01 +0200 writes: >>> > It "works" if you additionally (the [Enter], i.e., EOL) you also >>> > "send" an EOF -- in Unix alikes via <Ctrl>-D > From my point of view this is a reasonable workaround for now. I'm glad to hear that. Then, I now do think this needs to be dealt with as a bug (but I'm not delving into fixing it!) Martin > Thanks > Ralf > -- > Ralf Stubner > Senior Software Engineer / Trainer > daqana GmbH > Dortustraße 48 > 14467 Potsdam > T: +49 331 23 61 93 11 > F: +49 331 23 61 93 90 > M: +49 162 20 91 196 > Mail: ralf.stub...@daqana.com > Sitz: Potsdam > Register: AG Potsdam HRB 27966 P > Ust.-IdNr.: DE300072622 > Geschäftsführer: Prof. Dr. Dr. Karl-Kuno Kunze > x[DELETED ATTACHMENT signature.asc, application/pgp-signature] > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel