I’m trying to get a railscasts working but apparently things have changed a lot in the last year… So how can you now against which version of ruby the railscast was done? The gemfile contains all versions of gems, but not the version of ruby to use. And no, it isn’t all that backward compatible…
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Ruby v1.9.2 was used for the ASCIIcast. In all likelihood Ryan Bates also used a Ruby v1.9.x for his Railscast.
Can be seen in the ASCIIcast at http://railscasts.com/episodes/257-request-specs-and-capybara?view=asciicast in any of the terminal outputs.
Nothing in the Rails cast indicates that it would not also work with 1.8.7 to me.