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stack_user45
·
How to get a slice from Vec<T> in Rust: complete guide
Hi everyone! I started learning Rust and encountered a problem when working with vectors. I have a `Vec`, and I want to get a subset of its elements — that is, a slice. For example, I'm writing a program for data processing where there is a vector of numbers, and I need to work only with the first three elements or with a range from 2 to 5.
I tried different approaches, but the compiler gives errors. Here is my code:
```rust
fn main() {
let numbers = vec![10, 20, 30, 40, 50, 60];
// Want to get a slice with indices 1..3 (20, 30, 40)
let slice = numbers[1..4]; // Error!
println!("{:?}", slice);
}
```
The compiler says something about `Index` and `Range` traits — I don't quite understand what that means. I also heard that there is a difference between `&[T]` and `Vec`, but how to properly convert them
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