Beautiful CoffeeScript code for metaheuristic optimization. The visualizations are done in Protovis. A common misconception is that Protovis has its own languag

Beautiful CoffeeScript code for metaheuristic optimization. The visualizations are done in Protovis. A common misconception is that Protovis has its own language, since Protovis code is usually in <script type="text/javascript+protovis"> tags, which lets you write code like function(x) x*x This is actually JavaScript 1.8 (see https://developer.mozilla.org/en/New_in_JavaScript_1.8 https://developer.mozilla.org/en/New_in_JavaScript_1.8); Firefox can handle it directly, but Protovis down-compiles it to standard JavaScript for the benefit of other browsers. That design decision made a lot of sense before CoffeeScript existed, since standard JavaScript becomes extremely unwieldy in a Protovis context. I expect to see a lot more Protovis code done in CoffeeScript in the future.