update: functional log parser

advfuncs/new/01-intro/funcval/main.go

@@ -0,0 +1,28 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func main() {
+	fmt.Printf("HasPrefix: %T\n", strings.HasPrefix)
+	fmt.Printf("HasSuffix: %T\n", strings.HasSuffix)
+	fmt.Println()
+
+	var fn func(string, string) bool
+
+	fn = strings.HasPrefix
+	fn = strings.HasSuffix
+
+	ok := fn("gopher", "go")
+
+	fmt.Printf("ok       : %t\n", ok)
+}