←back to thread

John Carmack on mutable variables

(twitter.com)
498 points azhenley | 1 comments | 31 Oct 25 02:34 UTC | HN request time: 0.211s | source
Show context
nyrp ◴[31 Oct 25 13:43 UTC] No.45771906[source]▶
Is he referring to something specific with "true" iterative calculations vs. plain old iterative ones, assuming they are in some way "non-true" or less "true"? Like, avoiding i+=x in favor of ++i or something? Or maybe am I just tired today.
replies(1): >>45771950 #
1. ufo ◴[31 Oct 25 13:47 UTC] No.45771950[source]▶
I think he's just saying that mutation is ok if it's something loopy, like changing the loop counter or updating some running sum. So both i+=1 and ++i are fine.