Flow: A Static Type Checker for JavaScript

Lou Mauget JavaScript, Problem Solving, React, Technology Snapshot Leave a Comment

In this post, we’ll discuss the concept of types, compare static and dynamic types, and show an unobtrusive type inference package provided by Flow.org.

Facebook developed and maintains Flow. The package provides static typing to normally late-bound JavaScript code, including React code. It provides this analysis to a JavaScript application, even if it is an existing application.  Flow operates by carrying out a static abstract syntax tree (AST) analysis of type flows at build time.

Running Your Life With Emacs

Garrett Hopper Problem Solving, Programming, Technology Snapshot Leave a Comment

I program a lot, but I also do a lot of other things using a computer.

The problem is, I often want to use the same efficient key bindings I use while programming when I’m doing other tasks. I want to be writing an email or documentation and edit a code snippet in the same way I normally edit code. I want to manage Git repositories right from my editor without having to touch the mouse. I want to browse the web in my editor, so I can easily copy code examples and run them. I want to track my to-do lists and the amount of time spent on each task.

Imagine if there was a tool that could do all that and a ton more in an efficiently consistent way. That tool is Emacs…

Improving Performance in React Applications

Adrienne Gessler Design, JavaScript, Problem Solving, React 2 Comments

Let’s say you’ve stepped into a React application to make some updates or been involved in building one yourself. You have been at it a while, and feel somewhat comfortable using React, you understand React’s lifecycle and you may be using React libraries like Redux or MobX to some extent.

As with any technology, you start to notice that a few of the pages are looking a little slow. You know performance tuning too early is often a bad idea, but you feel like you might be at that point. After all, in your experience, end users notice even small lags and no one wants that. So what do you do now?

In this blog, I introduce six tips for improving performance and design in your React application.

Shrinkwrap before (or after) it’s too late!

Luke Patterson Docker, Programming, Technology Snapshot 2 Comments

This happened to me… Twas the night before beta launch… I installed a new node module for a last minute feature and everything went haywire when the change was deployed. I reverted the code change and built again but everything was still all messed up. What happened? Long story short, I kicked myself for not shrinkwrapping my dependencies while I …