Initial commit

11-if/02-if-statement/01-if-branch/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"
+
+func main() {
+	score, valid := 5, true
+
+	if score > 3 && valid {
+		fmt.Println("good")
+	}
+}

11-if/02-if-statement/02-else-branch/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"
+
+func main() {
+	score, valid := 3, true
+
+	if score > 3 && valid {
+		fmt.Println("good")
+	} else {
+		fmt.Println("low")
+	}
+}

11-if/02-if-statement/03-else-if-branch/01/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"
+
+func main() {
+	score := 3
+
+	if score > 3 {
+		fmt.Println("good")
+	} else if score == 3 {
+		fmt.Println("on the edge")
+	} else {
+		fmt.Println("low")
+	}
+}

11-if/02-if-statement/03-else-if-branch/02/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"
+
+func main() {
+	score := 2
+
+	if score > 3 {
+		fmt.Println("good")
+	} else if score == 3 {
+		fmt.Println("on the edge")
+	} else if score == 2 {
+		fmt.Println("meh...")
+	} else {
+		fmt.Println("low")
+	}
+}

11-if/02-if-statement/04-refactor-feet-to-meters/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"
+	"strconv"
+	"strings"
+)
+
+const usage = `
+Feet to Meters
+--------------
+This program converts feet into meters.
+
+Usage:
+feet [feetsToConvert]`
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println(strings.TrimSpace(usage))
+
+		// ALTERNATIVE:
+		// fmt.Println("Please tell me a value in feet")
+
+		return
+	}
+
+	arg := os.Args[1]
+
+	feet, _ := strconv.ParseFloat(arg, 64)
+
+	meters := feet * 0.3048
+
+	fmt.Printf("%g feet is %g meters.\n", feet, meters)
+}

11-if/02-if-statement/05-challenge-userpass/01-1st-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
+
+// ---------------------------------------------------------
+// CHALLENGE #1
+//  Create a user/password protected program.
+//
+// EXAMPLE USER
+//  username: jack
+//  password: 1888
+//
+// EXPECTED OUTPUT
+//  go run main.go
+//    Usage: [username] [password]
+//
+//  go run main.go albert
+//    Usage: [username] [password]
+//
+//  go run main.go hacker 42
+//    Access denied for "hacker".
+//
+//  go run main.go jack 6475
+//    Invalid password for "jack".
+//
+//  go run main.go jack 1888
+//    Access granted to "jack".
+// ---------------------------------------------------------
+
+func main() {
+}

11-if/02-if-statement/05-challenge-userpass/01-1st-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"
+)
+
+func main() {
+	args := os.Args
+
+	if len(args) != 3 {
+		fmt.Println("Usage: [username] [password]")
+		return
+	}
+
+	u, p := args[1], args[2]
+
+	if u != "jack" {
+		fmt.Printf("Access denied for %q.\n", u)
+	} else if p != "1888" {
+		fmt.Printf("Invalid password for %q.\n", u)
+	} else {
+		fmt.Printf("Access granted to %q.\n", u)
+	}
+}

11-if/02-if-statement/05-challenge-userpass/01-1st-challenge/03-solution-refactor/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     = "jack"
+	pass     = "1888"
+)
+
+func main() {
+	args := os.Args
+
+	if len(args) != 3 {
+		fmt.Println(usage)
+		return
+	}
+
+	u, p := args[1], args[2]
+
+	if u != user {
+		fmt.Printf(errUser, u)
+	} else if p != pass {
+		fmt.Printf(errPwd, u)
+	} else {
+		fmt.Printf(accessOK, u)
+	}
+}

11-if/02-if-statement/05-challenge-userpass/02-2nd-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 #2
+//  Add one more user to the PassMe program below.
+//
+// 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     = "jack"
+	pass     = "1888"
+)
+
+func main() {
+	args := os.Args
+
+	if len(args) != 3 {
+		fmt.Println(usage)
+		return
+	}
+
+	u, p := args[1], args[2]
+
+	if u != user {
+		fmt.Printf(errUser, u)
+	} else if p != pass {
+		fmt.Printf(errPwd, u)
+	} else {
+		fmt.Printf(accessOK, u)
+	}
+}

11-if/02-if-statement/05-challenge-userpass/02-2nd-challenge/02-solution/main.go

@@ -0,0 +1,43 @@
+// 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]
+
+	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)
+	}
+}