Hey! Author of the post here.

While the text itself is my own words, the logical structure and the examples were indeed based off DDIA's chapter 3. I dropped the ball here - the site has been updated with proper attribution.

Thanks, we've added this to the thread's top text.

Come on, that's not enough. a) The parent said "taken straight from" but you've watered that down to "inspired by"; which is it? b) You've edited this post on HN, but the actual original article still makes no mention of the source.

Yep, fair enough. We've had contact with the post's publisher, and whilst it would be unfair of us to disclose the details of the communication, I've now updated the header text (to what I originally posted there when I first saw the root comment's allegation), and have down-weighted the post.