5 ms·

That’s only formatting. The other (and more important) matter, — that is not even mentioned, — is comparison. E. g. in “rational by default in this specific c

by lelf 7y ago

That’s only formatting. The other (and more important) matter, — that is not even mentioned, — is comparison. E. g. in “rational by default in this specific case” languages (Perl 6), > 0.1+0.2==0.3 True Or, APL (now they are floats there! But comparison is special) 0.1+0.2 0.3 ⎕PP←20 ⋄ 0.1+0.2 0.30000000000000004 (0.1+0.2) ≡ 0.3 1

Athas 7y ago
Exactly what are the rules for the "special comparison" in APL? That sounds horrifying to me.
- lelf 7y ago
  Assume the values could be equal if the relative error of the operation is greater than a small predefined value (called “⎕ct”, comparison tolerance, and you can change it).
  - enriquto 7y ago
    but this is not an equivalence relation. You may have a=b and b=c but a!=c it's horrifying!
lizmat 7y ago
Please note that Perl 6 has been renamed to "Raku" (https://raku.org https://raku.org using #rakulang as a tag for social media). In Raku, the comparison operator is basically a subroutine that uses multiple dispatch to select the correct candidate for handling comparisons between Rat's and other numeric objects.