Challenge 33

Rust Challenge: Calculate Hamming Distance

Write a function hamming_distance that calculates the Hamming Distance between two DNA strands (strings of C, A, G, T).

The Hamming Distance is the number of positions where the characters differ.

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Solution

#![allow(unused)]

fn main() {
fn hamming_distance(dna1: &str, dna2: &str) -> Result<usize, &'static str> {
    if dna1.len() != dna2.len() {
        return Err("DNA strands must be of equal length");
    }
    Ok(dna1.chars().zip(dna2.chars()).filter(|(a, b)| a != b).count())
}

}