I ordered a sampler pack of Zeal mechanical keyswitches to test out on my Ultimate Hacking Keyboard (UHK) and they arrived today.

The problem with null

In programming languages that have the concept of null, any value in a system can be (for example) a number or null; a string or null; an object or null.

Null (or nil in Ruby, undefined in Javascript, etc.) presents a problem for us when working with untyped sources of data. If we’re not careful null values can spread throughout our software, causing errors in remote code locations that expect non-null values.

GitLab has a very useful integrated CI environment that you can use with pretty much any project.