log2

Finds log-base-2.

Alternatives: log2, log10.
Similar: log2, pow2, isPow2, nextPow2, prevPow2.

log2(x)
// x: an int32

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


xinteger.log2(64);
// → 6

xinteger.log2(31);
// → 4

xinteger.log2(1);
// → 0

References

• DeBruijn method: Bit Twiddling Hacks
• bit-twiddle: @mikolalysenko