public static int CompareAsVersionTo([CanBeNull] this string a, [CanBeNull] string b)
{
if (a == null)
{
return(b == null ? 0 : -1);
}
if (b == null)
{
return(1);
}
var ap = a.Trim().ApartFromFirst("v").Split('.');
var bp = b.Trim().ApartFromFirst("v").Split('.');
for (var i = 0; i < ap.Length && i < bp.Length; i++)
{
var c = AlphanumComparatorFast.Compare(ap[i].Trim(), bp[i].Trim());
if (c != 0)
{
return(c);
}
}
return(ap.Length - bp.Length);
}
