Bug #5699: Windowsで一部のFloat値が正しく扱えない

浮動小数点数の計算には誤差があります。参考サイト: * http://download.oracle.com/docs/cd/E19957-01/806-4847/ncg_goldberg.html * http://wiki.github.com/rdp/ruby_tutorials_core/ruby-talk-faq#floats_imprecise * http://en.wikipedia.org/wiki/Floating_point#Accuracy_problems

FAQでした、すみません。 1.9.2 は、より正しく表示出来るようになったということで 納得しました。 https://github.com/rdp/ruby_tutorials_core/wiki/ruby-talk-faq#floats_imprecise >> 1.1 => 1.1 # in reality this probably doesn't equal exactly 1.1 deep down--but it's equal to 1.1's default so ruby 1.9.2 will display it as 1.1 > 0.9 => 0.9 > 1.1-0.9 => 0.20000000000000007 # now ruby 1.9.2 notices that "this 0.2 is not the same as the default float for 0.2" so it displays its full version to remind us of this fact.

• Status changed from Open to Rejected