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Joel Spolsky has just released the third incarnation of his Guerrilla Guide to Interviewing. I find it both interesting, useful and amusing.

This time he mentions Ruby on Rails.

I want my ER doctor to understand anatomy, even if all she has to do is put the computerized defibrillator nodes on my chest and push the big red button, and I want programmers to know programming down to the CPU level, even if Ruby on Rails does read your mind and build a complete Web 2.0 social collaborative networking site for you with three clicks of the mouse.

Of course I am biased in judging the Rails crowd, but I tend to think that Ruby programmers in general have an understanding of pointers, recursive functions, assembler and microprogramming. That's actually how we learned to love Ruby.