Great suggestion; it made me change all my Ts/Fs to TRUE/FALSE. Given F <- TRUE T <- FALSE is it possible to forbid T to stand for TRUE, and F for FALSE in function(...,something=T)? Or, alternatively, never allow F <- whatever and T <- whatever?
I don't know what the technical side is, but I think it would be much better if this particular blunder (major, yet rather easy to overlook) was impossible to make. -----Original Message----- From: Martin Maechler [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 20, 2005 8:31 AM To: R-help@stat.math.ethz.ch Subject: [R] if(foo == TRUE) .. etc >>>>> "Andy" == Andy Bunn <[EMAIL PROTECTED]> >>>>> on Tue, 19 Apr 2005 10:27:04 -0400 writes: ..... Andy> is.tuesday <- as.POSIXlt(Sys.time())$wday == 2 Andy> if (is.tuesday == T) { ....} ..... aaah, this really hurts my eyes or rather the brain behind! And it's by far not the first such instance... Rather use " if (is.tuesday) { .... } " More generally, please, please, everyone : Replace if (something == TRUE) with if (something) and if (something.or.other == FALSE) with if (!something.or.other) {and even more for cases where you have 'T' and 'F' instead of 'TRUE' and 'FALSE' - which is against all recommendations, since F <- TRUE T <- FALSE are valid statements, probably not common, but think what happens when you accidentally have the equivalent of "T <- 0" somewhere in your global enviroment! } Martin Maechler, ETH Zurich ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
