I recently ported my little CreditCard.js library from Prototype.js to use underscore.js, as I needed that in a project. Here’s what I’ve found—check out the original Prototype.js version first: And here’s the same thing, but ported to underscore.js: A few observations that, needless to say, are opinions, not scientific fact: Prototype.js’ direct extensions of built-in … Continue reading Prototype.js vs. underscore.js showdown