Earlier quoted context omitted.
You're looking for someone who is a fan of the same progr. lang. as you are, who uses the same text editor, the same VCS, and even the same libraries/frameworks. You're looking for a designer who uses the same version of Photoshop that you're using, or at least uses the version you think he/she should be using.
Yes, agree with both posts. You shouldn't care what language or library he's using. There aren't "Ruby programmers", there are just programmers. I honestly try to stay away from people who claim they are language x programmers and those who think one language is superior, because quite frankly they're often not that good. Honestly are Ruby programmers really better than those who code in C or haskell and honestly wha…
I happen to know alot. Including Maya/3D Studio and even Final Cut/Vegas Studios.
I am not just a Ruby programmer, I also speak PHP and Objective-C...
I'm not saying a person should ONLY know Ruby, jeez! This person can have other interests and knowledge as well...