get set bits in a base 10 number

gistfile1.js

/**
 * Returns an array of set bits in a base 10 number.
 * @param  int base10
 * @return Array
 */
var getSetBits = function ( base10 )
{
	if (!base10) {
		return;
	}
	// get highest set bit
	var hsb = 1;
	if (base10 > 1) {
		while (hsb < base10) {
			hsb *= 2;
		}
		if (base10%2) {
			hsb /= 2;
		}
	}
	// add section for each set bit
	var a = [];
	while (hsb >= 1) {
		if (hsb & base10) {
			a.push(hsb);
		}
		hsb /= 2;
	}
	return a;
};