args.go
func (a *Args) GetUfloatOrZero(key string) float64 {
	f, err := a.GetUfloat(key)
	if err != nil {
		f = 0
	}
	return f
}
func (a *Args) GetUfloatOrZero(key string) float64 {
	f, err := a.GetUfloat(key)
	if err != nil {
		f = 0
	}
	return f
}
// GetUfloatOrZero returns ufloat value for the given key.
//
// Zero (0) is returned on error.