after.rs

pub fn estimate(&self, e: &E) -> u64 {
    indexes(e, self.width)
        .take(self.depth)
        .enumerate()
        .map(|(i, idx)| self.counters[i][idx])
        .min()
        .unwrap()
}

before.rs

pub fn estimate(&self, e: E) -> C {
    let (h1, h2) = hashes(e);
    let mut max: C = Int::zero();
    for (i, c) in self.counters.iter().enumerate() {
        let idx = index(h1, h2, i, c.len());
        let v = c[idx];
        if v > max {
            max = v
        }
    }
}