Calculating simple moving average in Rust and target Node native module.

lib.rs

use node_bindgen::derive::node_bindgen;

#[node_bindgen]
pub fn simple_moving_average(array_prices: Vec<f64>, window: f64) -> Vec<f64> {
    let interval = window as usize;
    let mut index = interval - 1;
    let length = array_prices.len() + 1;
    
    let mut results = Vec::new();

    while index < length {
        index = index + 1;

        let start_index = index - interval;
        let interval_slice = &array_prices[start_index..index-1];
        let sum: f64 = interval_slice.iter().sum();
        let interval_float = interval as f64;
        results.push(sum / interval_float);
    }

    return results;
}