publish lancet

formatter/formatter.go

@@ -0,0 +1,17 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package formatter implements some functions to format string, struct.
+package formatter
+
+import "strings"
+
+// Comma add comma to number by every 3 numbers from right. ahead by symbol char
+func Comma(v interface{}, symbol string) string {
+	s := numString(v)
+	dotIndex := strings.Index(s, ".")
+	if dotIndex != -1 {
+		return symbol + commaString(s[:dotIndex]) + s[dotIndex:]
+	}
+	return symbol + commaString(s)
+}