Initial commit

12-switch/exercises/00/main.go

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+// 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
+
+// ---------------------------------------------------------
+// EXERCISE
+//  ?
+//
+// NOTE
+//  ?
+//
+// EXPECTED OUTPUT
+//  ?
+// ---------------------------------------------------------
+
+func main() {
+}

12-switch/exercises/00/solution/main.go

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+// 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
+
+func main() {
+}

12-switch/exercises/_challenge/01-challenge/main.go

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+// 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"
+	"os"
+)
+
+// ---------------------------------------------------------
+// CHALLENGE
+//  Convert the if statement into a switch statement.
+//
+// EXAMPLE USERS
+//  username: jack
+//  password: 1888
+//
+//  username: inanc
+//  password: 1879
+//
+// EXPECTED OUTPUT
+//  go run main.go
+//    Usage: [username] [password]
+//
+//  go run main.go hacker 42
+//    Access denied for "hacker".
+//
+//  go run main.go jack 1888
+//    Access granted to "jack".
+//
+//  go run main.go inanc 1879
+//    Access granted to "inanc".
+//
+//  go run main.go jack 1879
+//    Invalid password for "jack".
+//
+//  go run main.go inanc 1888
+//    Invalid password for "inanc".
+// ---------------------------------------------------------
+
+const (
+	usage       = "Usage: [username] [password]"
+	errUser     = "Access denied for %q.\n"
+	errPwd      = "Invalid password for %q.\n"
+	accessOK    = "Access granted to %q.\n"
+	user, user2 = "jack", "inanc"
+	pass, pass2 = "1888", "1879"
+)
+
+func main() {
+	args := os.Args
+
+	if len(args) != 3 {
+		fmt.Println(usage)
+		return
+	}
+
+	u, p := args[1], args[2]
+
+	// refactor this into switch
+	if u != user && u != user2 {
+		fmt.Printf(errUser, u)
+	} else if u == user && p == pass {
+		fmt.Printf(accessOK, u)
+	} else if u == user2 && p == pass2 {
+		fmt.Printf(accessOK, u)
+	} else {
+		fmt.Printf(errPwd, u)
+	}
+}

12-switch/exercises/_challenge/02-solution/main.go

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+// 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"
+	"os"
+)
+
+const (
+	usage       = "Usage: [username] [password]"
+	errUser     = "Access denied for %q.\n"
+	errPwd      = "Invalid password for %q.\n"
+	accessOK    = "Access granted to %q.\n"
+	user, user2 = "jack", "inanc"
+	pass, pass2 = "1888", "1879"
+)
+
+func main() {
+	args := os.Args
+
+	if len(args) != 3 {
+		fmt.Println(usage)
+		return
+	}
+
+	u, p := args[1], args[2]
+
+	switch {
+	case u != user && u != user2:
+		fmt.Printf(errUser, u)
+	case u == user && p == pass:
+		fallthrough
+	case u == user2 && p == pass2:
+		fmt.Printf(accessOK, u)
+	default:
+		fmt.Printf(errPwd, u)
+	}
+}