@extra-integer/bit-count v2.0.0

Counts bits set in 32-bit integer (parallel method).

This is part of package extra-integer.

integer.bitCount(x);
// x: an integer

const integer = require('extra-integer');

integer.bitCount(7);
// 3 (111 => 3)

integer.bitCount(12);
// 2 (1100 => 2)

integer.bitCount(63);
// 6 (111111 => 6)

references

• Bit Twiddling Hacks: By Sean Eron Anderson