Rust: What is the difference between get and get_mut?

get — immutable access. get_mut — mutable access.

get:

• Returns Option<&T>.
• No bounds check panic.
• Safe.

get_mut:

• Returns Option<&mut T>.
• No bounds check panic.
• Safe mutation.

1let v = vec![1, 2, 3];
2
3// get: Some(&2)
4let item = v.get(1);
5
6// get: None (out of bounds)
7let item = v.get(10);
8
9let mut v = vec![1, 2, 3];
10if let Some(item) = v.get_mut(1) {
11    *item = 10;
12}

Key: get for reading, get_mut for writing.