multierror and multilogger cleaned up.

multierr/funcs.go

@@ -39,12 +39,19 @@ func NewErrors(errs ...error) (err error) {
 // NewMultiError will provide a MultiError (true type), optionally initialized with errors.
 func NewMultiError(errs ...error) (m *MultiError) {
 
-	if errs == nil {
-		errs = make([]error, 0)
+	var realErrs []error = make([]error, 0)
+
+	if errs != nil {
+		for _, e := range errs {
+			if e == nil {
+				continue
+			}
+			realErrs = append(realErrs, e)
+		}
 	}
 
 	m = &MultiError{
-		Errors:   errs,
+		Errors:   realErrs,
 		ErrorSep: "\n",
 	}
 
@@ -83,3 +90,21 @@ func (e *MultiError) AddError(err error) {
 	e.Errors = append(e.Errors, err)
 
 }
+
+// Count returns the number of errors in a MultiError.
+func (e *MultiError) Count() (n int) {
+
+	n = len(e.Errors)
+
+	return
+}
+
+// IsEmpty is a shorthand for testing if e.Errors is empty.
+func (e *MultiError) IsEmpty() (empty bool) {
+
+	if e.Count() == 0 {
+		empty = true
+	}
+
+	return
+}