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chore: clippy1 hint enhancement

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Added some explanation and links about floating point representation and to use the clippy suggestion. (fixes #390)
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arlecchino 2021-06-29 20:47:32 +02:00 committed by GitHub
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info.toml
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@ -902,7 +902,15 @@ name = "clippy1"
path = "exercises/clippy/clippy1.rs"
mode = "clippy"
hint = """
Floating point calculations are usually imprecise, so asking if two values are exactly equal is asking for trouble"""
Not every floating point value can be represented exactly in binary values in
memory. Take a look at the description of
https://doc.rust-lang.org/stable/std/primitive.f32.html
When using the binary compare operators with floating points you won't compare
the floating point values but the binary representation in memory. This is
usually not what you would like to do.
See the suggestions of the clippy warning in compile output and use the
machine epsilon value...
https://doc.rust-lang.org/stable/std/primitive.f32.html#associatedconstant.EPSILON"""
[[exercises]]
name = "clippy2"