On 10/12/2010 12:05 PM, William Dunlap wrote:
> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Martin Maechler > Sent: Friday, December 10, 2010 8:54 AM > To: Steve Lianoglou > Cc: r-help@r-project.org > Subject: Re: [R] Perl "cut" equivalent in R > > >>>>> "SL" == Steve Lianoglou<mailinglist.honey...@gmail.com> > >>>>> on Mon, 6 Dec 2010 14:21:59 -0500 writes: > > >>> if(FALSE) { stuff your don't want executed } > >>> > >> > > Switching a block of code off/on with editing a single > >> character may be done using 0/1 instead of FALSE/TRUE. > > SL> Or even F/T > > Bad Idea: > > F<- 1Another approach is to write the following function dontRun<- function(expr) {} and replace that if (FALSE) { ... questionable code ... } with dontRun( {... questionable code ...} ) If you do want the questionable code to run, redefine dontRun to be dontRun<- function(expr) { expr } You can use this approach to put assertion tests into your code that only get run when the assertion function is defined to do something.
That's a nice idea! Duncan Murdoch ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
