private static Option <double> ParseToDouble(Untrusted <string> source)
{
var result = 0d;
return(source.Validate(
s => double.TryParse(s, out result),
onSuccess: _ => result
));
}
private static Try <string, double> ParseToDouble(Untrusted <string> source)
{
var result = 0d;
return(source.Validate(
s => double.TryParse(s, out result),
failure: s => $"Failed to parse '{s}' to double",
success: _ => result
));
}