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I assume the title was targeted at Peteris' normal audience, not web app developers. From the about: Peteris Krumins’ blog about programming, hacking, software

by paulgb 17y ago

I assume the title was targeted at Peteris' normal audience, not web app developers. From the about: Peteris Krumins’ blog about programming, hacking, software reuse, software ideas, computer security, google and technology.

notaddicted 17y ago
The purpose of the Hacker News website is to serve past/present/future ycombinator candidates. I'm not even a web app developer, I wrote C code for an $8 processor today. The title (as submitted by the author of the blog) says "Absolutely Must Know," which is quite hyperbolic. I would suggest: Basic tricks of bit manipulation. Consider that this topic is covered in K. N. King's book C Programming: A Modern Approach, in Chapter 20: Low-Level Programming, on page 451