add: slice exercises

16-slices/exercises/01-declare-nil/solution/main.go

@@ -0,0 +1,26 @@
+// 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"
+
+func main() {
+	var (
+		names     []string  // The names of your friends
+		distances []int     // The distances
+		data      []byte    // A data buffer
+		ratios    []float64 // Currency exchange ratios
+		alives    []bool    // Up/Down status of web servers
+	)
+
+	fmt.Printf("names    : %T %d %t\n", names, len(names), names == nil)
+	fmt.Printf("distances: %T %d %t\n", distances, len(distances), distances == nil)
+	fmt.Printf("data     : %T %d %t\n", data, len(data), data == nil)
+	fmt.Printf("ratios   : %T %d %t\n", ratios, len(ratios), ratios == nil)
+	fmt.Printf("alives   : %T %d %t\n", alives, len(alives), alives == nil)
+}