One. You can't browse a CD in the bathroom, on a plane
about to take off, etc. Yes, you can throw the CD in a
laptop, but a book is still more portable (and the flight
attendant won't yell at you for opening a book) :)
RE: RE: How Many Perl Books do you Own?
Replies are listed 'Best First'.
I'd have to say that I disagree about books on CD not being good for reference.
I like having hard copy books, if I'm going to read them cover to cover and mark up the margins with comments, and highlight bits of them. But I keep a copy of the "Perl CD bookshelf" on my computer at work (NOT shared, so I don't violate copyrights!) and it's great to be in the middle of writing a script to just open a shortcut and look through the index for what I need.
Oh, NOT counting the "CD Bookshelf" I think I have 8 Perl books. If you count "Mastering Regular Expression" that makes 9, because that book is very useful for Perl programmers.