@jashkenas I think your example just happened to not have problems. Underscore.js still has problems (https://github.com/documentcloud/underscore/issues/7 https

@jashkenas I think your example just happened to not have problems. Underscore.js still has problems (https://github.com/documentcloud/underscore/issues/7 https://github.com/documentcloud/underscore/issues/7) with Prototype.js. I have made a small test (http://dl.dropbox.com/u/513327/underscore_prototype_compat.html http://dl.dropbox.com/u/513327/underscore_prototype_compat.h...) to show some of the potential issues.