notohh/rustlings
notohh/rustlings
1
0
Fork 0
mirror of https://github.com/notohh/rustlings.git synced 2024-11-25 23:04:17 -05:00
Code Issues Projects Releases Packages Wiki Activity

chore: clippy1 hint enhancement

Browse source 
Added some explanation and links about floating point representation and to use the clippy suggestion. (fixes #390)
This commit is contained in:
arlecchino 2021-06-29 20:47:32 +02:00 committed by GitHub
parent 633303d4b8
commit 9bf4c5e8df
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
info.toml
View file

@ -902,7 +902,15 @@ name = "clippy1"
path = "exercises/clippy/clippy1.rs" path = "exercises/clippy/clippy1.rs"
mode = "clippy" mode = "clippy"
hint = """ 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]] [[exercises]]
name = "clippy2" name = "clippy2"