Struct DenseMask 

pub struct DenseMask { /* private fields */ }

Dense bitmask for row selection

Implementations

impl DenseMask

pub fn new(len: usize) -> Self

Create a new mask with the given length (in bits)

pub fn all_ones(len: usize) -> Self

Create a mask with all bits set

pub fn len(&self) -> usize

Get the length in bits

pub fn is_empty(&self) -> bool

Check if empty

pub fn set(&mut self, index: usize, value: bool)

Set a bit at the given index (requires mutable Arc)

pub fn get(&self, index: usize) -> bool

Get a bit at the given index

pub fn count_ones(&self) -> u64

Count the number of set bits

pub fn density(&self) -> f64

Calculate density (ratio of set bits to total bits)

pub fn and_inplace(&mut self, other: &DenseMask)

In-place AND with another mask

pub fn or_inplace(&mut self, other: &DenseMask)

In-place OR with another mask

pub fn not_inplace(&mut self, used_rows: Range<u32>)

In-place NOT within used rows range

pub fn iter_ones(&self) -> Box<dyn Iterator<Item = u32> + '_>

Iterate over set bit positions

pub fn from_indices(indices: &[u32], len: usize) -> Self

Create from a slice of row indices

pub fn select<'a, T>(&self, values: &'a [T]) -> Vec<&'a T>

Apply to select values from a slice

Trait Implementations

impl Clone for DenseMask

fn clone(&self) -> DenseMask

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DenseMask

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.