Re: Language design
I like the explanation of how Rats solve a class of rounding errors, 0.3 - (0.2 + 0.1) equals exactly 0 for example. On the other hand, it's still a compromise that's shifting closer to correctness, fixing a bunch of potential bugs, but not all in that class: Rakudo: > say 2 - (sqrt 2) ** 2 -4.44089209850063e-016 That's OK by me. I can also envision a type which can perfectly represent trigonometric and polynomial roots (backed by a symbolic math package?), that would solve this problem. I can see why that might be good in the core, for the same reasons that Rats are... or maybe put them in a module, along with non-integer exponents and trig functions, so if you can use functions with irrational numbers in their domain, you also get the numeric types that can perfectly represent them. -y
[perl6/specs] bbb0e9: Clarify lack of special meaning of $a,$b in Perl 6
Branch: refs/heads/master Home: https://github.com/perl6/specs Commit: bbb0e90f3a67d61cd4be9f7a419d643bd504f72d https://github.com/perl6/specs/commit/bbb0e90f3a67d61cd4be9f7a419d643bd504f72d Author: Elizabeth Mattijsen Date: 2015-06-21 (Sun, 21 Jun 2015) Changed paths: M S28-special-names.pod Log Message: --- Clarify lack of special meaning of $a,$b in Perl 6
[perl6/specs] 1a6957: Changed equivalent of Perl 5's $0 from C<$*PROGRAM...
Branch: refs/heads/master Home: https://github.com/perl6/specs Commit: 1a695756c741797827546342a2f636d360cb3ca8 https://github.com/perl6/specs/commit/1a695756c741797827546342a2f636d360cb3ca8 Author: David H. Adler Date: 2015-06-20 (Sat, 20 Jun 2015) Changed paths: M S28-special-names.pod Log Message: --- Changed equivalent of Perl 5's $0 from C<$*PROGRAM> to C<$*PROGRAM_NAME>
