Programmer Humor

32380 readers

1413 users here now

Post funny things about programming here! (Or just rant about your favourite programming language.)

Rules:

Posts must be relevant to programming, programmers, or computer science.
No NSFW content.
Jokes must be in good taste. No hate speech, bigotry, etc.

founded 5 years ago

MODERATORS

[email protected]

725

Floating-point arithmetic (lemmy.ml)

submitted 9 months ago by [email protected] to c/[email protected]

24 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 85 points 9 months ago (9 children)

Took me 2 hours to find out why the final output of a neural network was a bunch of NaN. This is always very annoying but I can't really complain, it make sense. Just sucks.

[–] [email protected] 16 points 9 months ago (7 children)

I guess you can always just add an assert not data.isna().any() in strategic locations

[–] [email protected] 31 points 9 months ago (4 children)

That could be a nice way. Sadly it was in a C++ code base (using tensorflow). Therefore no such nice things (would be slow too). I skill-issued myself thinking a struct would be 0 -initialized but MyStruct input; would not while MyStruct input {}; will (that was the fix). Long story.

[–] [email protected] 5 points 9 months ago* (last edited 9 months ago)

If you use the GNU libc the feenableexcept function, which you can use to enable certain floating point exceptions, could be useful to catch unexpected/unwanted NaNs

load more comments (3 replies)

load more comments (5 replies)

load more comments (6 replies)