Double Shot #1889

ES6 In Depth Articles - High-quality set of explanatory content from Mozilla. Symbols, modules, classes, proxies, let and const, and more, all demystified.
How Kingmakers Build Rails Apps Using Just the 2SC Framework - Wait, what? We have kingmakers?
CSS and JS code coverage - The latest drop of Chrome DevTools can help you find stuff that you're downloading but not using.
kubernetes-deploy: If your automated deployment tool needs a scripting front end to help you figure out what happened, it scares me just a bit. Looks useful though.
Tuning NGINX behind Google Cloud Platform HTTP(S) Load Balancer - Definitely worth bookmarking if you're planning to use GCP. Mike Fotinakis dug deep in fixing some rare error conditions.
A Comparison of Docker GUIs - A survey of the current landscape for managing small to medium Docker installs, including a few I hadn't heard about before.
Easymongo, Minimongo, and Mongocore - A variety of Mongo clients in Ruby from the makers of CrowdfundHQ. Pick your own level of syntax and feature support!
Node.js callbacks vs promises vs generators vs async-await - Snarky me wants to wonder why it took four tries (and counting?) to get it right. Nice me is happy to see improvements in syntax and code readability.
Carrierwave::Attachmentscanner - Send uploads to be virus checked before you toss them into your database.
Fort Awesome - "Like Font Awesome But Better". Commercial service now in beta, looks like it's focused on more speed & flexibility.
Share RuboCop rules across all of your repos - The Percy guys show how you can do this by putting rules in your own custom gem.