I think there'll always be a place for scripted (non-compiled) languages, particularly in the web context, no matter how complicated Web apps become. And there

I think there'll always be a place for scripted (non-compiled) languages, particularly in the web context, no matter how complicated Web apps become. And there are lots of strategies for complexity management; compilation is just one possibility. It's never the case that the shiny new technology blows away the busted old technology; more like the new stuff becomes another blade in your swiss army knife. What's the learning curve for Closure like and how did you come up to speed on it? It is like an API or more like a tool like gcc?