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Programming, rust

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What is this question mark operator about?

I’m reading the documentation for File: //.. let mut file = File::create("foo.txt")?; //.. What is the ? in this line? I do not ...

June 2, 2022
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Programming, rust

IT Nursery

How can a Rust program access metadata from its Cargo package?

How do you access a Cargo package’s metadata (e.g. version) from the Rust code in the package? In my case, I am building ...

May 28, 2022
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How can I include a module from another file from the same project?

By following this guide I created a Cargo project. src/main.rs fn main() { hello::print_hello(); } mod hello { pub fn print_hello() { println!("Hello, ...

May 25, 2022
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How do I create a global, mutable singleton?

What is the best way to create and use a struct with only one instantiation in the system? Yes, this is necessary, it ...

May 24, 2022
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Why are Rust executables so huge?

Just having found Rust and having read the first two chapters of the documentation, I find the approach and the way they defined ...

May 21, 2022
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How do I split a string in Rust?

From the documentation, it’s not clear. In Java you could use the split method like so: "some string 123 ffd".split("123"); 6 Answers 6

May 21, 2022
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What are Rust’s exact auto-dereferencing rules?

I’m learning/experimenting with Rust, and in all the elegance that I find in this language, there is one peculiarity that baffles me and ...

May 20, 2022
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Package with both a library and a binary?

I would like to make a Rust package that contains both a reusable library (where most of the program is implemented), and also ...

May 16, 2022
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Why can’t I store a value and a reference to that value in the same struct?

I have a value and I want to store that value and a reference to something inside that value in my own type: ...

May 14, 2022
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Convert a String to int?

Note: this question contains deprecated pre-1.0 code! The answer is correct, though. To convert a str to an int in Rust, I can ...

May 13, 2022
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