add: arrays

14-arrays/07-compare/main.go

@@ -0,0 +1,49 @@
+// 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"
+
+// STORY:
+// You want to compare two bookcases,
+// whether they're equal or not.
+
+func main() {
+	// When comparing two arrays,
+	// Their types should be identical
+
+	var (
+		// equal (types + elements are identical)::
+		blue = [3]int{6, 9, 3}
+		red  = [3]int{6, 9, 3}
+
+		// equal (types + elements are identical):
+		// blue = [...]int{6, 9, 3}
+		// red  = [3]int{6, 9, 3}
+
+		// not equal (element ordering are different):
+		// blue = [3]int{6, 9, 3}
+		// red  = [3]int{3, 9, 6}
+
+		// not equal (the last elements are not equal):
+		// blue = [3]int{6, 9}
+		// red  = [3]int{6, 9, 3}
+
+		// not comparable (type mismatch: length):
+		// blue = [3]int{6, 9, 3}
+		// red  = [5]int{6, 9, 3}
+
+		// not comparable (type mismatch: element type):
+		// blue = [3]int64{6, 9, 3}
+		// red  = [3]int{6, 9, 3}
+	)
+	fmt.Printf("blue bookcase : %v\n", blue)
+	fmt.Printf("red bookcase  : %v\n", red)
+
+	fmt.Println("Are they equal?", blue == red)
+}