Question

How to pad an array to a specified length with a given value in Rust

Answer 1

fn array_pad(arr: &[i32], size: usize, value: i32) -> Vec<i32> {
    let original_size = arr.len();
    if size < original_size {
        return arr.to_vec();
    }
    let mut padded_array = Vec::with_capacity(size);
 
    // Copy original array elements
    for &item in arr {
        padded_array.push(item);
    }
 
    // Pad the array with the given value
    for _ in original_size..size {
        padded_array.push(value);
    }
 
    padded_array
}
 
fn main() {
    let arr = vec![1, 2, 3];
    let size = 5;
    let value = 0;
 
    let padded_array = array_pad(&arr, size, value);
 
    for num in padded_array {
        print!("{} ", num);
    }
}
 
 
    
/*
run:
 
1 2 3 0 0 
   
*/

 

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