Method append_n

arrow-array/src/builder/generic_bytes_dictionary_builder.rs:312–320

Append a value multiple times to the array. This is the same as `append` but allows to append the same value multiple times without doing multiple lookups. Returns an error if the new index would overflow the key type.

(
        &mut self,
        value: impl AsRef<T::Native>,
        count: usize,
    )

    ///
    /// Returns an error if the new index would overflow the key type.
    pub fn append_n(
        &mut self,
        value: impl AsRef<T::Native>,
        count: usize,
    ) -> Result<K::Native, ArrowError> {
        let key = self.get_or_insert_key(value)?;
        self.keys_builder.append_value_n(key, count);
        Ok(key)
    }

    /// Infallibly append a value to this builder
    ///