Function find_duplicate_value

datafusion/functions-nested/src/map.rs:160–167

(len: usize, values: I)

}

fn find_duplicate_value<T, I>(len: usize, values: I) -> Option<T>
where
    T: Copy + Eq + Hash,
    I: IntoIterator<Item = T>,
{
    let mut seen_keys = HashSet::with_capacity(len);
    values.into_iter().find(|value| !seen_keys.insert(*value))
}

fn validate_unique_keys_generic(array: &dyn Array) -> Result<()> {
    let mut seen_keys = HashSet::with_capacity(array.len());