How can I port this C++ code to Rust:
auto sgnR = (R >= 0.) ? 1. : -1.;
I have seen some examples with the match keyword, but I don't understand how it works.
How can I port C++ code that uses the ternary operator to Rust?
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2 Answers
As of Rust 1.50, you can use bool::then to accomplish the same thing:
let sgn_r = (r >= 0).then(|| 1).unwrap_or(-1);
Note that it is generally better to use a regular if/else statement for readability reasons, but bool::then is an alternative that may be nicer in certain circumstances.
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