Adam, Author at Adam DeLong

How to Solve Elixir’s “Module Is Not Available” Error

Adam June 26, 2018 4 Comments

Elixir's "module is not available" error can drive you nuts. But fear not: After writing a lot of Elixir and seeing this error often, I'll developed a few quick tricks that you can use to solve why your module is not available in seconds instead of minutes. Here's 4 quick things you can check. Check Your Module Definition This almost goes without saying, but every time I don't check the module...

How To Test Asynchronous Text Changes with Hound and Phoenix

Adam April 10, 2018 0 Comments

Writing asynchronous acceptance tests in Hound for Elixir and Phoenix can be difficult, especially if you are using a JavaScript framework like React, Vue.js, or Angular. If you have ever used end-to-end testing in your web application’s test suite, you have undoubtedly come across the issue of “flapping” tests. In many of the Ruby on Rails projects that I get asked to work on, I come...

How to Count Specific Items in a Collection with Elixir

Adam February 26, 2018 2 Comments

So, I was working on this exercise over at Exercism.io, when I stumbled up an interesting function. To make a long story short, I needed a count of a specific character (codepoint) in a character list i.e. 'hello' contains two ls. However, this solution could apply to any collection which implements the Enumerable protocol in Elixir. I have been reading Programming in Elixir. The author, Dave...

Fluid Layouts with Auto Layout, Size Classes, Spacer Views, and Constraint Priorities

Adam May 6, 2015 0 Comments

I came across a problem the other day with the "compact x any" size class in iOS 8 & Xcode 6. I was creating a layout for the size class which is supposed to cover the iPhone 4S 3.5-inch screen all the way up to the iPhone 6 4.7-inch screen. However, this became difficult to do well because what looked good on a small screen (like the 3.5-inch) did not look good on the large screen (4.7-inch...

How to Use Swift Computed Properties to Create a Simple Goal Tracker Class

Adam April 22, 2015 0 Comments

This is the fourth Swift tutorial and video in a series I'm doing on Swift development. Source code examples are available on GitHub In this tutorial, we’re going to take a look at Swift computed properties and how they work. We’re going to create a very simple GoalTracker class. All our GoalTracker class is going to do is track our progress through something, i.e. how many miles or...