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I am new to Ruby and to Ruby on Rails and have spent the last few days trying to get my head around it. I think I am already hooked but am suffering badly from years of programming a non-OO RDBMS. I am trying to learn by attempting to produce a system for my work. I have a main table sdocs which has a field supplier_id which is an entry in another table (suppliers) to lookup supplier name etc.

I am using RMagick to convert some files served up by a rails app from tiff''s to pdf''s on the fly. I have Imagemagick installed but was having trouble with some of the conversions. I tried installing GraphicsMagick and running the conversions manually and they work fine using GraphicsMagick. (They do not work properly even manually with ImageMagick.) I can''t see

I am using rmagick to convert files stored as a tiff to either pdf or jpg for display to the user. A snippet of test code from the controller follows. It works OK. ( it does need a sanitizer ) require RMagick def pdf @sdoc = Sdoc.find(params[:id]) @fname = ''/var/www/images/'' + @sdoc.fname @nf = Magick::ImageList.new(@fname)

I apologise in advance for this newbie question but I am still waiting to receive some books on ruby & rails and I can''t find the solution online. I am learning rails, (and since rails is the only thing I have used that is based on ruby I am also learning ruby,) by developing a small application for work to index and serve up images from a document store. The documents are

...a chroot it can't read the passwd and group files anymore. The daemon mode was really designed for being read-only, so you need to jump through a lot of hoops to write to one. I usually try to discourage people from doing it. - Dave Dykstra On Wed, Jul 18, 2001 at 05:01:00PM +1000, Steven@heimann.com.au wrote: > I am new to rsync and am having trouble getting the presevation of groups > to work when I do an rsync copy between two computers. I have tried the > documentation, the list archives and FAQ and everything seems to indicate > that it should just work. > > On comp...

Dear all, a program that worked well for weeks today gave me consistently the error message no lines available in input referring to the lines for (i in (0:(timeintervals-1))) { j=subjectquantity+6+i*(subjectquantity+7) print (j) results<-read.table(file, header=F, skip=j, nrows=subjectquantity) timeintervals have been specified as argument as 12 subjectquantity as 9 the file it should