Snippet

Bitwise ArrayBuffer Filtering for Dynamic Reactive State

Combines TypedArrays (Uint8Array), bitwise bitmask operators, and Vue shallowRef/computed instances for ultra-high-density state evaluation. By avoiding reactive proxy overhead on array elements, state operations run directly over raw memory buffers.

snippet.js

javascript

import { shallowRef, computed } from 'vue';
 
const MASK_ACTIVE = 1 << 0;
const MASK_ADMIN  = 1 << 1;
 
const rawFlags = new Uint8Array([1, 3, 0, 2, 1]);
const flagsState = shallowRef(rawFlags);
 
export const activeAdmins = computed(() => {
  const buf = flagsState.value;
  const matches = [];
  for (let i = 0; i < buf.length; i++) {
    if ((buf[i] & (MASK_ACTIVE | MASK_ADMIN)) === (MASK_ACTIVE | MASK_ADMIN)) {
      matches.push(i);
    }
  }
  return matches;
});

vue

Breakdown

const MASK_ACTIVE = 1 << 0;

Defines integer bit flags using left-shift operators for fast bitmask evaluations.

const flagsState = shallowRef(rawFlags);

Wraps the TypedArray in a shallowRef to prevent Vue from proxying array element indices.

(buf[i] & (MASK_ACTIVE | MASK_ADMIN))

Applies bitwise AND combined mask checks against memory bytes in execution loops.

Previous snippet Next snippet

More Expert JavaScript exercises →

Bitwise ArrayBuffer Filtering for Dynamic Reactive State

Related