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Metaprogramming Virtual Attributes Discussion

Nice intro into metaprogramming and how concerns can be used.
I'm one of the fresh subscribers and have noticed one thing: no need to quit rails console to clear the console output. To save couple of seconds you can just press cmd + K in terminal (also from rails console) and you're good to continue.

Sweet! I figured there might be something to do that. I only ever clear the terminal in screencasts so I always forget to look that up. :)

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One suggestion. Post references about related screencasts, gems etc in description please)

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