good good study, day day up!

vendor/gopl.io/ch12/methods/methods.go

@@ -0,0 +1,29 @@
+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// See page 351.
+
+// Package methods provides a function to print the methods of any value.
+package methods
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+//!+print
+// Print prints the method set of the value x.
+func Print(x interface{}) {
+	v := reflect.ValueOf(x)
+	t := v.Type()
+	fmt.Printf("type %s\n", t)
+
+	for i := 0; i < v.NumMethod(); i++ {
+		methType := v.Method(i).Type()
+		fmt.Printf("func (%s) %s%s\n", t, t.Method(i).Name,
+			strings.TrimPrefix(methType.String(), "func"))
+	}
+}
+
+//!-print