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rustlings/exercises/primitive_types/primitive_types4.rs
2018-11-09 20:31:14 +01:00

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1.0 KiB
Rust
Executable File

// primitive_types4.rs
// Get a slice out of Array a where the ??? is so that the `if` statement
// returns true. Scroll down for hints!!
fn main() {
let a = [1, 2, 3, 4, 5];
let nice_slice = ???
if nice_slice == [2, 3, 4] {
println!("Nice slice!");
} else {
println!("Not quite what I was expecting... I see: {:?}", nice_slice);
}
}
// Take a look at the Understanding Ownership -> Slices -> Other Slices section of the book:
// https://doc.rust-lang.org/stable/book/second-edition/ch04-03-slices.html#other-slices
// and use the starting and ending indices of the items in the Array
// that you want to end up in the slice.
// If you're curious why the right hand of the `==` comparison does not
// have an ampersand for a reference since the left hand side is a
// reference, take a look at the Deref coercions section of the book:
// https://doc.rust-lang.org/stable/book/second-edition/ch15-02-deref.html#implicit-deref-coercions-with-functions-and-methods