Rust Tutorials

How to Copy an Array in Rust

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How to Copy an Array in Rust ?

Answer

To copy an array in Rust, you can use the clone() method or create a new array and copy the elements manually.

✐ Examples

1 Copying an Array using clone() Method

In this example,

We create an array named arr1 with elements.
We then use the clone() method to create a copy of arr1 into arr2.
The clone() method creates a deep copy of the array.

Rust Program

fn main() {
    let arr1 = [1, 2, 3, 4, 5];
    let arr2 = arr1.clone();
    println!("Array 1: {:?}", arr1);
    println!("Array 2 (copy of Array 1): {:?}", arr2);
}

Output

Array 1: [1, 2, 3, 4, 5]
Array 2 (copy of Array 1): [1, 2, 3, 4, 5]

2 Copying an Array Manually

In this example,

We create an array named arr1 with elements.
We then create a new array arr2 with the same length as arr1.
We use a loop to copy each element from arr1 to arr2 individually.

Rust Program

fn main() {
    let arr1 = [1, 2, 3, 4, 5];
    let mut arr2 = [0; 5];
    for (i, &val) in arr1.iter().enumerate() {
        arr2[i] = val;
    }
    println!("Array 1: {:?}", arr1);
    println!("Array 2 (copy of Array 1): {:?}", arr2);
}

Output

Array 1: [1, 2, 3, 4, 5]
Array 2 (copy of Array 1): [1, 2, 3, 4, 5]

Summary

In this tutorial, we learned How to Copy an Array in Rust language with well detailed examples.

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How to Copy an Array in Rust

How to Copy an Array in Rust ?

Answer

✐ Examples

1 Copying an Array using clone() Method

Rust Program

Output

2 Copying an Array Manually

Rust Program

Output

Summary

More Rust Arrays Tutorials