add: experimental maps example

17-maps/_experimental/main.go

@@ -0,0 +1,36 @@
+// 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/
+//
+
+// why maps instead of keyed arrays etc?
+// 120k elements!
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"unicode/utf8"
+)
+
+func main() {
+	args := os.Args[1:]
+	if len(args) != 1 {
+		fmt.Println("[emoji]")
+		return
+	}
+
+	moods := [...]string{
+		'😊': "a happy",
+		'😟': "a worried",
+		'😎': "an awesome",
+		'😞': "a sad",
+		'😩': "a crying",
+	}
+
+	emoji, _ := utf8.DecodeRune([]byte(args[0]))
+	fmt.Printf("%s is %s emoji\n", args[0], moods[emoji])
+}