Earlier quoted context omitted.
It's funny you say that. I can't name one factory pattern off the top of my head... Never needed to learn one. I should clarify -- I'm in my late twenties, and I've spent my entire career (10 years) writing Java code. I don't understand how that negatively hiring managers against me.
Well sorry to be crude, but it just signals that you're all talk. You say you're a great programmer, and could learn to program in Ruby in a few days, yet in 10 years you've never done it, even though you are apparently applying for jobs that are interested in that skill. If you can't even bother with learning the language that's requested in the advert in a few days, why should a hiring manager be interested in you?…
We ask people to avoid this kind of personal slight in HN comments because it inevitably lowers the discussion. You can make a substantive point without resorting to that, so please do.