Arrays: Difference between revisions

=={{header|Rust}}==

The Rust book has a [http://doc.rust-lang.org/1.0.0-beta/book/arrays-vectors-and-slices.html tutorial on arrays].

By default, arrays are immutable unless defined otherwise.

<lang rust>let a = [1, 2, 3]; // immutable array

let mut m = [1, 2, 3]; // mutable array

let zeroes = [0; 200]; // creates an array of 200 zeroes</lang>

To get the length and iterate,

<lang rust>let a = [1, 2, 3];

a.len();

for e in a.iter() {

e;

}</lang>

Accessing a particular element uses subscript notation, starting from 0.

<lang rust>let names = ["Graydon", "Brian", "Niko"];

names[1]; // second element</lang>

Dynamic arrays in Rust are called vectors.

<lang rust>let v = vec![1, 2, 3];</lang>

However, this defines an immutable vector. To add elements to a vector, we need to define v to be mutable.

<lang rust>let mut v = vec![1, 2, 3];

v.push(4);

v.len(); // 4</lang>