Create populated in Rust 1.55

To create an array in Rust 1.55, you need to specify the type and the size of the array.

Here is an example of creating an array of integers with size 3:

let my_array: [i32; 3] = [1, 2, 3];

In this example, my_array is the name of the array, [i32; 3] specifies the type (an array of 3 integers), and [1, 2, 3] are the values of the array.

You can also initialize the array with the same value for all elements:

let my_array: [i32; 3] = [0; 3];

In this example, the array is initialized with 3 zeros.

You can access individual elements in the array using indexing:

let my_array: [i32; 3] = [1, 2, 3];
let first_element = my_array[0];
let second_element = my_array[1];

In this example, first_element is assigned the value 1, and second_element is assigned the value 2.

Note that Rust arrays have a fixed size, which is determined at compile time. If you need a collection that can grow or shrink dynamically, you may want to use a Vec instead.