public static T2 WhereSumF <T2>(this ReadOnlySpan <float> source, Func <float, bool> predicate, Func <float, T2> selector)
where T2 : struct, IConvertible // Make sure these are not nullable
{
if (source == null)
{
throw Error.ArgumentNull(nameof(source));
}
if (predicate == null)
{
throw Error.ArgumentNull(nameof(predicate));
}
if (selector == null)
{
throw Error.ArgumentNull(nameof(selector));
}
INumericPolicy <double> p = NumericPolicies.Instance;
double a = 0;
checked
{
foreach (float b in source)
{
if (predicate(b))
{
a = p.Add(a, selector(b).ToDouble(CultureInfo.InvariantCulture));
}
}
}
return((T2)Convert.ChangeType(a, typeof(T2)));
}
public static T2 WhereSumF <T2>(this List <float?> source, Func <float?, bool> predicate, Func <float?, T2> selector)
where T2 : struct, IConvertible // Make sure these are not nullable
{
if (source == null)
{
throw Error.ArgumentNull(nameof(source));
}
if (predicate == null)
{
throw Error.ArgumentNull(nameof(predicate));
}
if (selector == null)
{
throw Error.ArgumentNull(nameof(selector));
}
INumericPolicy <double> p = NumericPolicies.Instance;
double a = 0;
checked
{
for (int index = 0; index < source.Count; index++)
{
if (predicate(source[index]))
{
a = p.Add(a, selector(source[index]).ToDouble(CultureInfo.InvariantCulture));
}
}
}
return((T2)Convert.ChangeType(a, typeof(T2)));
}