Hacker News: doublewhy

New comment by doublewhy in "Meta Ray-Ban Display"

doublewhy — Thu, 18 Sep 2025 08:22:09 +0000

Anyone using Meta Ray-Bans should be aware that your data is collected and used for AI training. There is no opt-out unless you're from EU. Also, the old Meta View companion app one day was renamed into the Meta AI app and started to provide ChatGPT like functionality.

1) “Meta AI with camera use is always enabled on your glasses unless you turn off ‘Hey Meta", which basically makes glasses defunct.

2) “voice transcripts and stored audio recordings are otherwise stored for up to one year to help improve Meta’s products.”

[1] https://www.theverge.com/news/658602/meta-ray-ban-privacy-po...

New comment by doublewhy in "Two and a Half Years in GameDev"

doublewhy — Mon, 07 Jul 2025 09:28:00 +0000

I’m always struck by how different the software engineering culture is in the gaming industry compared to the rest of tech. Maybe it’s because games are usually self-contained, end-to-end products, while most SaaS platforms are in a constant state of iteration and never truly "done"?

New comment by doublewhy in "A senior engineer's guide to the system design interview (2nd half)"

doublewhy — Thu, 30 Mar 2023 17:49:40 +0000

There are many fantastic comments discussing the first part. https://news.ycombinator.com/item?id=34999464

New comment by doublewhy in "A senior engineer's guide to the system design interview (2nd half)"

doublewhy — Thu, 30 Mar 2023 17:47:59 +0000

The first part of this system design guide is really amazing! I love how it's super focused on the interview process, which is super helpful during your job search. System design can cover so many different things like databases and infrastructure that might not be relevant to your interview, so it's great that this guide keeps it simple and practical, but at the same time comprehensive.

New comment by doublewhy in "Princeton Bitcoin and Cryptocurrency Technologies Online Course Now Open"

doublewhy — Sat, 24 Jan 2015 11:53:39 +0000

Could you please add more information about programming assignments to course description? The level of programming proficiency, what programming language are you going to use, etc.

In my opinion it would be also helpful to add info about background expectations and expected workload (e.g. ~5h/week).

New comment by doublewhy in "Ask HN: How or where to begin learning mathematics from first principles?"

doublewhy — Thu, 04 Dec 2014 12:49:09 +0000

Stanford has a great online course titled "How to Learn Math". It doesn't answer your question directly, but explains what approach should you take to learn math effectively. Course is very short, just 6 lessons by 20 minutes each.