Having taken Sandi's in-person course (which sounds like it covers a lot of the same territory as this book), the vast majority of it would be perfectly applica

Having taken Sandi's in-person course (which sounds like it covers a lot of the same territory as this book), the vast majority of it would be perfectly applicable to Javascript. Ruby lets you get away with some neat tricks, like dynamically loading classes by name to avoid ugly switch statements, or the occasional bit of monkey patching, but it's not the focus at all and it's easy to see how you could accomplish it in a more "traditional" way.