Really enjoyed this series. Previous parts:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11526923" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11526923</a> [Intro, C++]<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11541526" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11541526</a> [Python]<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11571451" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11571451</a> [CLOS]