Method true_count

arrow-array/src/array/boolean_array.rs:161–173

Returns the number of non null, true values within this array. If you only need to check if there is at least one true value, consider using `has_true()` which can short-circuit and be more efficient.

(&self)

    /// Returns the number of non null, true values within this array.
    /// If you only need to check if there is at least one true value, consider using `has_true()` which can short-circuit and be more efficient.
    pub fn true_count(&self) -> usize {
        match self.nulls() {
            Some(nulls) => {
                let null_chunks = nulls.inner().bit_chunks().iter_padded();
                let value_chunks = self.values().bit_chunks().iter_padded();
                null_chunks
                    .zip(value_chunks)
                    .map(|(a, b)| (a & b).count_ones() as usize)
                    .sum()
            }
            None => self.values().count_set_bits(),
        }
    }

    /// Returns the number of non null, false values within this array.
    /// If you only need to check if there is at least one false value, consider using `has_false()` which can short-circuit and be more efficient.