Example
fn main() {
// Statically allocated string slice
let hello = "Hello world";
// This is equivalent to the previous one
let hello_again: &'static str = "Hello world";
// An empty String
let mut string = String::new();
// An empty String with a pre-allocated initial buffer
let mut capacity = String::with_capacity(10);
// Add a string slice to a String
string.push_str("foo");
// From a string slice to a String
// Note: Prior to Rust 1.9.0 the to_owned method was faster
// than to_string. Nowadays, they are equivalent.
let bar = "foo".to_owned();
let qux = "foo".to_string();
// The String::from method is another way to convert a
// string slice to an owned String.
let baz = String::from("foo");
// Coerce a String into &str with &
let baz: &str = &bar;
}
Note: Both the String::new and the String::with_capacity methods will create empty strings. However, the latter allocates an initial buffer, making it initially slower, but helping reduce subsequent allocations. If the final size of the String is known, String::with_capacity should be preferred.
