Author: John Ruble

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 […]

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 […]

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 […]

Folding Away Mutations in F#

I’ve been working in F# lately, and one of its smaller features has had a big impact on my programming style: Variables are immutable by default. If you want to change something, you have to declare it mutable. Sometimes, this is what I naturally reach for, and the language rubs my nose in it. Here’s […]