I recently lost my full time job. I’m working as a contractor, but one of the things about my life is that I’m legally obligated to have health insurance at all times, so I’m looking for a new full time job, which means I’m also looking at old code that I have hanging around on Github to see…

J Paul Daigle in Perplexinomicon

Mar 23, 2018

A Tale of Graphs and Darkness

TL/DR

Review of the previous two posts.
Small world networks have short distances between similarly connected nodes.
You can extract a small world of data from a small world network with a…

J Paul Daigle in Perplexinomicon

Mar 20, 2018

Just the ‘T’ from ‘ETL’

Introduction

This is part 1 of a 2 part series in an N part series about about microservices. Our overall goal is to create three microservices with related data, host them on Heroku, and then look at strategies for coordinating those services.

J Paul Daigle in Perplexinomicon

Feb 24, 2018

The Kevin Bacon Problem

TL/DR

Download compressed .tsv files
Import tsv files into postgres database
Create phoenix.ecto project
Connect project to tables from import step

J Paul Daigle in Perplexinomicon

Oct 10, 2017

Mock Responses with Stash

So a few posts ago, we looked at how to abstract dependent modules in Elixir to make testing easier. That post and its follow up attempt to implement a pattern suggested by Jose Valim, which he called explicit contract. This pattern has the following characteristics:

J Paul Daigle in Perplexinomicon

Aug 7, 2017

Elixir for the Little Things

A lot of blog posts, videos, books, and tutorials about programming Elixir tend to focus on the big things: web apps, web apps with Plug, web apps with Phoenix, web apps that need to handle 80 million concurrent requests, web apps that need to be web scale, big things. Big…

J Paul Daigle in Perplexinomicon

Nov 21, 2016

Real Responses from Mock Modules

A couple of weeks ago, I wrote about how to move a mock module out of your production code and into your test folder. Today we’ll follow up with a short post on getting fake responses from your mock module. For this example I’m going to use HTTP mocking, because that is…

J Paul Daigle in Perplexinomicon

Oct 25, 2016

Mock Modules and Where to Find Them

TL/DR

The compile path for a mix project defaults to /lib, but you can add environment specific load paths by defining a function in your mix.exs file that takes the Mix.env as an input. Reference this function by adding a elixirc_paths…

1 response

J Paul Daigle in Perplexinomicon

Jul 19, 2016

Using Macros to Handle Environment Variables in Elixir

Here on my team at Manheim, we work in three or four, or maybe five, languages. We use Ruby and Elixir for building apis, Groovy for automating Jenkins, Bash for automating anything that isn’t automated in Ruby, Elixir, or Groovy, and…

3 responses