For web developers: Ruby and Rails. Because both Ruby & Rails are evolving at a faster pace than I've seen in a decade, and web-scale companies like GitHub, Sho

For web developers: Ruby and Rails. Because both Ruby & Rails are evolving at a faster pace than I've seen in a decade, and web-scale companies like GitHub, Shopify, and Stripe are finding new ways to squeeze every drop of performance out of the platform while prioritizing programmer happiness.