Ruby

David Heinemeier Hansson on the Future of Rails и My experience with Minitest and RSpec
Announcing Scenic — Versioned Database Views for Rails и Seamless second database integration for Rails
Passages Rails Engine и Transforming Hashes — Which Way is Best?

JavaScript

10th Anniversary of jQuery, jQuery 2.2 and 1.12 Released, jQuery 3.0 Beta, Lodash v4.0.0 и ChakraCore is the core part of the Chakra Javascript engine that powers Microsoft Edge
Why I hate your Single Page App и Constant Variables in JavaScript, or: When «const» Isn’t Constant
Centralized State Design Patterns и React.run — The fastest way to create React components, right in the browser