Android Emulator on CircleCI’s MacOS Executor
The Android Emulator, unfortunately, doesn’t work in CircleCI’s conventional (Docker-based) Android build environment. With a little tinkering, though, we can make it work in another environment!
Author: John Ruble
Sharing TypeScript Code Between Web and React Native
We’re building a hybrid mobile app out of an existing web app. The front end will run out of a webview, and we’re adapting the back end to run on-device in [React Native]. One of the challenges we encountered was how to share code between our existing [monorepo] built with [webpack] and our new React […]
Ergonomic TypeScript Generics with Higher-Order Functions
Much of TypeScript’s flexibility comes from its support for generics. They’re great for building up reusable abstractions so that you can share the “how” across your codebase even as the “what” varies significantly. In this post, I’ll describe a limitation that recently got in my way, and how I worked around it.
Document Your Project’s package.json File
The package.json file is the heart of any Node.js project, but it often goes entirely undocumented. In this post, I’ll review a few areas that are worth documenting, and how I like to do it.
Organize One-Off Task Files with Dated Work Directories
Say you’re about to begin a task that will involve working with some files. Perhaps you’re creating a diagram or encoding some GIFs. Where do you put the files?
Replacing Heroku Review Apps on Non-GitHub Projects
If your software team develops multiple new features simultaneously, you need to be able to deploy and test them in isolation. The gold standard for this is to use Heroku’s review apps, which are temporary environments automatically spun up for each pull request. Unfortunately, the feature only works with GitHub; if you’re using another source […]
Collection Operations on Lazy Sequences in TypeScript with itiriri
I’m currently working in TypeScript after spending a lot of time in F#, and I’ve been experimenting with adapting my favored functional approaches to the former.
Getting Started with AWS Lambda in F#
I recently set out to create my first AWS Lambda function. Of the supported languages, I chose my favorite: F#. In this post, I’ll walk through the process of building a Lambda function in F# and deploying it to AWS. AWS Alphabet Soup Many of Amazon’s web services have famously inscrutable names. After fumbling my […]
Fixing the External Monitor Color Problem with My 2018 MacBook Pro
I recently upgraded to a 2018 MacBook Pro. I’m enjoying the additional cores and memory (😀) and coming to terms with the touchbar (🤨). A low point of my first week came when I plugged into my external display, and the image looked really bad. In this post, I’ll describe what I learned and how […]
Creating Azure WebJobs in F#
My colleague Brian recently wrote about Azure Functions in F#. Azure Functions are great, and I definitely recommend them if they fit your use case. These functions are built on top of an older background processing system called WebJobs. While Functions have largely eclipsed WebJobs, there remain certain [situations][webjobs-vs-functions] where the latter is still a […]