function ascending( a, b ) {
	return a - b;
}
Specifies a sort order for ordering numeric values in ascending order.

## Notes

-   If `a < b`, then function returns a number less than `0`, which specifies to sort `a` to an index lower than `b`.
-   If `a > b`, then function returns a number greater than `0`, which specifies to sort `a` to an index higher than `b`.
-   If `a == b`, then function returns `0`, which specifies that the order of `a` and `b` should remain unchanged (not guaranteed).

@private
@param {number} a - first value
@param {number} b - second value
@returns {number} difference between `a` and `b`