Created
July 15, 2011 17:55
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floating point crazyness
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| $ irb | |
| irb(main):001:0> RUBY_VERSION | |
| => "1.9.2" | |
| irb(main):002:0> 1.8 + 0.1 | |
| => 1.9000000000000001 | |
| irb(main):003:0> 1.8 + 0.1 == 1.9 | |
| => false | |
| irb(main):004:0> | |
| ## Ruby 1.8 wont even let you know whats going on! | |
| ree-1.8.7-2011.03 :008 > RUBY_VERSION | |
| => "1.8.7" | |
| ree-1.8.7-2011.03 :009 > 1.8 + 0.1 | |
| => 1.9 | |
| ree-1.8.7-2011.03 :010 > 1.8 + 0.1 == 1.9 | |
| => false | |
| ree-1.8.7-2011.03 :011 > |
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It'd be nice if it could keep track of significant figures or something and round off the noise at the end. Maybe that's what that MPFR library is for. I just wish things like Decimal and Rational were as small and quick as Float.