public static DenormalizedProbability <int> Get(int lb, int ub)
{
#if DEBUG
if (lb > ub)
{
throw new InvalidOperationException("lb > ub");
}
#endif
if (lb == ub)
{
return(ConstantDistribution <int> .Get(lb));
}
var index = new KeyValuePair <int, int>(lb, ub);
if (_cache.TryGetValue(index, out var val))
{
return(new DenormalizedProbability <int>(val));
}
var raw = new Dictionary <int, float>();
for (int x = lb; x <= ub; x++)
{
raw[x] = 1;
}
var ret = new DenormalizedProbability <int>(raw);
ret.Normalize();
_cache[index] = new DenormalizedProbability <int>(ret);
return(ret);
}
static public float LessThan(this int lhs, DenormalizedProbability <int> rhs)
{
DenormalizedProbability <int> LHS = ConstantDistribution <int> .Get(lhs);
DenormalizedProbability <int> ret_src = DenormalizedProbability <int> .Apply(LHS *rhs, _less_than);
return(ret_src[1]);
}