minor speed improvements

* added check for "-" in custom field name

validator.go

@@ -404,6 +404,7 @@ func (v *Validate) tranverseStruct(topStruct reflect.Value, currentStruct reflec
 	numFields := current.NumField()
 
 	var fld reflect.StructField
+	var customName string
 
 	for i := 0; i < numFields; i++ {
 		fld = typ.Field(i)
@@ -421,10 +422,13 @@ func (v *Validate) tranverseStruct(topStruct reflect.Value, currentStruct reflec
 			}
 		}
 
-		customName := fld.Name
+		customName = fld.Name
 		if v.fieldNameTag != "" {
-			name := strings.Split(fld.Tag.Get(v.fieldNameTag), ",")[0]
-			if name != "" {
+
+			name := strings.SplitN(fld.Tag.Get(v.fieldNameTag), ",", 2)[0]
+
+			// dash check is for json "-" means don't output in json
+			if name != "" && name != "-" {
 				customName = name
 			}
 		}

validator_test.go

@@ -4936,15 +4936,24 @@ func TestCustomFieldName(t *testing.T) {
 		B string `schema:"b" validate:"required"`
 		C string `schema:"c" validate:"required"`
 		D []bool `schema:"d" validate:"required"`
+		E string `schema:"-" validate:"required"`
 	}
 
 	a := &A{}
 
 	errs := New(&Config{TagName: "validate", FieldNameTag: "schema"}).Struct(a).(ValidationErrors)
+	NotEqual(t, errs, nil)
+	Equal(t, len(errs), 4)
 	Equal(t, errs["A.B"].Name, "b")
 	Equal(t, errs["A.C"].Name, "c")
 	Equal(t, errs["A.D"].Name, "d")
+	Equal(t, errs["A.E"].Name, "E")
 
 	errs = New(&Config{TagName: "validate"}).Struct(a).(ValidationErrors)
+	NotEqual(t, errs, nil)
+	Equal(t, len(errs), 4)
 	Equal(t, errs["A.B"].Name, "B")
+	Equal(t, errs["A.C"].Name, "C")
+	Equal(t, errs["A.D"].Name, "D")
+	Equal(t, errs["A.E"].Name, "E")
 }