You're right, 8 bits is small enough to just store in a table. This trick will w... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		lawrencewu on March 21, 2018 \| parent \| context \| favorite \| on: A Neat Bitwise Trick for Swapping Even and Odd Bit... You're right, 8 bits is small enough to just store in a table. This trick will work for any number of bits though. You might not want to use 2^64 entries in your table.

joezydeco on March 21, 2018 [–]

The question was an unsigned 8-bit input, not an arbitrary number.

And the "trick" given in the answer still depends on a fixed number of input bits, no matter if it's 8, 32, or 10^100.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact