Besides Ruby-Doc, what sources are best to take some examples and tutorials from, especially about Tk/Tile in Ruby? I found myself more normal with
but the information is pretty vague, and there is not so much to learn from. I had to consult multiple sources. I found two books from O'Reilly Media:
but don't know if it's the right thing to start with. Even Lynda.com doesn't have anything interesting to look into.
The best site I know of for learning Tk is TkDocs, which has a tutorial that covers multiple languages including Ruby. (To just see the Ruby version, set the language in the side-bar. Alternatively, leave it at the default of “All Languages” to find out how other languages bind the same library; the differences can be illuminating…)