Up and Running / Tour Libs / Math / possible example error #19048
Comments
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I'm practically positive it works, but you've made me wonder if it's as correct/clear as it could be. Set owner to @kwalrath. |
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This comment was originally written by Neta...@gmail.com My suggestion is that it is misleading to show a round to 2 decimals, while the result show one decimal. I'm not questioning the method's accuracy. :) |
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Removed Area-Documentation label. |
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This comment was originally written by googlegroups...@kaioa.com Same effect: assert((sinOf30degrees - 0.5).abs() < 0.01); |
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We've already shown toStringAsPrecision(), so it seems like kaioa's assertion is a good way to go. Added Started label. |
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CL in review: https://chromiumcodereview.appspot.com/453093005/ |
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Added Fixed label. |
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This issue has been moved to Github as part of a migration. Please use the Issue on Github going forward: https://github.com/dart-lang/dartlang.org/issues |
This issue was originally filed by NetaisLLC...@gmail.com
URL: https://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html#ch03-trigonometry
Issue/feedback:
The last example assert in the Trig. section seems wrong.
// Truncate the decimal places to 2.
assert(double.parse(sinOf30degrees.toStringAsPrecision(2)) == 0.5);
Should not the value on the right of == be 0.50, or perhaps to make it more clear, a value such as 0.51?
Attachment:
[5-27-2014 1-56-33 PM.jpg](https://storage.googleapis.com/google-code-attachments/dart/issue-19048/comment-0/5-27-2014 1-56-33 PM.jpg) (134.68 KB)
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