- len
- capacity
- with_capacity
- resize
- TODO
fn main() {
// Create vector of 5 elements initialized to 0
let vec = vec![0; 5];
println!("{:?}", vec);
// Create vector of 5 elements initialized to 42
let vec = vec![42; 5];
println!("{:?}", vec);
// Creata an empty vector that can hold up to 5 elements.
let mut vec: Vec<i32> = Vec::with_capacity(5);
vec.resize(3, 19);
println!("{:?}", vec);
println!("len: {:?}", vec.len());
println!("capacity: {:?}", vec.capacity());
println!();
vec.resize(6, 23);
println!("{:?}", vec);
println!("len: {:?}", vec.len());
println!("capacity: {:?}", vec.capacity());
println!();
let mut vec: Vec<i32> = vec![];
println!("{:?}", vec);
println!("len: {:?}", vec.len());
println!("capacity: {:?}", vec.capacity());
println!();
vec.push(42);
println!("{:?}", vec);
println!("len: {:?}", vec.len());
println!("capacity: {:?}", vec.capacity());
println!();
}
[0, 0, 0, 0, 0]
[42, 42, 42, 42, 42]
[19, 19, 19]
len: 3
capacity: 5
[19, 19, 19, 23, 23, 23]
len: 6
capacity: 10
[]
len: 0
capacity: 0
[42]
len: 1
capacity: 4