Method count_set_bits_offset

arrow-buffer/src/buffer/immutable.rs:357–359

Returns the number of 1-bits in this buffer, starting from `offset` with `length` bits inspected. Note that both `offset` and `length` are measured in bits.

(&self, offset: usize, len: usize)

    /// Returns the number of 1-bits in this buffer, starting from `offset` with `length` bits
    /// inspected. Note that both `offset` and `length` are measured in bits.
    pub fn count_set_bits_offset(&self, offset: usize, len: usize) -> usize {
        UnalignedBitChunk::new(self.as_slice(), offset, len).count_ones()
    }

    /// Returns `MutableBuffer` for mutating the buffer if this buffer is not shared.
    /// Returns `Err` if this is shared or its allocation is from an external source or