Method find_primary

perro_source/core/perro_csv/src/lib.rs:177–179

(&self, key: &str)

    /// Returns the first header with `name_hash`.
    ///
    /// Hash-only lookups cannot distinguish collisions. Use [`Self::header_index`] when the
    /// original header text is available.
    #[inline]
    pub fn header_index_hash(&self, name_hash: u64) -> Option<usize> {
        self.headers.iter().position(|cell| cell.hash == name_hash)
    }