Initial commit

08-numbers-and-strings/02-strings/exercises/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"
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Change the following program
+//  2. It should use a raw string literal instead
+//
+// HINT
+//  Run this program first to see its output.
+//  Then you can easily understand what it does.
+//
+// EXPECTED OUTPUT
+//  Your solution should output the same as this program.
+//  Only that it should use a raw string literal instead.
+// ---------------------------------------------------------
+
+func main() {
+	// HINTS:
+	// \\ equals to backslash character
+	// \n equals to newline character
+
+	path := "c:\\program files\\duper super\\fun.txt\n" +
+		"c:\\program files\\really\\funny.png"
+	fmt.Println(path)
+}

08-numbers-and-strings/02-strings/exercises/01/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"
+
+func main() {
+	// this one uses a raw string literal
+
+	// can you see how readable it is?
+	// compared to the previous one?
+
+	path := `c:\program files\duper super\fun.txt
+c:\program files\really\funny.png`
+
+	fmt.Println(path)
+}

08-numbers-and-strings/02-strings/exercises/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"
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Change the following program
+//  2. It should use a raw string literal instead
+//
+// HINT
+//  Run this program first to see its output.
+//  Then you can easily understand what it does.
+//
+// EXPECTED OUTPUT
+//  Your solution should output the same as this program.
+//  Only that it should use a raw string literal instead.
+// ---------------------------------------------------------
+
+func main() {
+	// HINTS:
+	// \t equals to TAB character
+	// \n equals to newline character
+	// \" equals to double-quotes character
+
+	json := "\n" +
+		"{\n" +
+		"\t\"Items\": [{\n" +
+		"\t\t\"Item\": {\n" +
+		"\t\t\t\"name\": \"Teddy Bear\"\n" +
+		"\t\t}\n" +
+		"\t}]\n" +
+		"}\n"
+
+	fmt.Println(json)
+}

08-numbers-and-strings/02-strings/exercises/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"
+
+func main() {
+	// this one uses a raw string literal
+
+	// can you see how readable it is?
+	// compared to the previous one?
+
+	json := `
+{
+	"Items": [{
+		"Item": {
+			"name": "Teddy Bear"
+		}
+	}]
+}`
+
+	fmt.Println(json)
+}

08-numbers-and-strings/02-strings/exercises/03/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"
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Initialize the name variable
+//     by getting input from the command line
+//
+//  2. Use concatenation operator to concatenate it
+//     with the raw string literal below
+//
+// NOTE
+//  You should concatenate the name variable in the correct
+//  place.
+//
+// EXPECTED OUTPUT
+//  Let's say that you run the program like this:
+//   go run main.go inanç
+//
+//  Then it should output this:
+//   hi inanç!
+//   how are you?
+// ---------------------------------------------------------
+
+func main() {
+	// uncomment the code below
+	// name := "and get the name from the command-line"
+
+	// replace and concatenate the `name` variable
+	// after `hi ` below
+
+	msg := `hi CONCATENATE-NAME-VARIABLE-HERE!
+how are you?`
+
+	fmt.Println(msg)
+}

08-numbers-and-strings/02-strings/exercises/03/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() {
+	name := os.Args[1]
+
+	msg := `hi ` + name + `!
+how are you?`
+
+	fmt.Println(msg)
+}

08-numbers-and-strings/02-strings/exercises/04/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"
+)
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Change the following program to work with unicode
+//     characters.
+//
+// INPUT
+//  "İNANÇ"
+//
+// EXPECTED OUTPUT
+//  5
+// ---------------------------------------------------------
+
+func main() {
+	// Currently it returns 7
+	// Because, it counts the bytes...
+	// It should count the runes (codepoints) instead.
+	//
+	// When you run it with "İNANÇ", it should return 5 not 7.
+
+	length := len(os.Args[1])
+	fmt.Println(length)
+}

08-numbers-and-strings/02-strings/exercises/04/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"
+	"unicode/utf8"
+)
+
+func main() {
+	length := utf8.RuneCountInString(os.Args[1])
+	fmt.Println(length)
+}

08-numbers-and-strings/02-strings/exercises/05/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"
+	"strings"
+)
+
+// ---------------------------------------------------------
+// EXERCISE
+//  Change the Banger program the work with Unicode
+//  characters.
+//
+// INPUT
+//  "İNANÇ"
+//
+// EXPECTED OUTPUT
+//  İNANÇ!!!!!
+// ---------------------------------------------------------
+
+func main() {
+	msg := os.Args[1]
+
+	s := msg + strings.Repeat("!", len(msg))
+
+	fmt.Println(s)
+}

08-numbers-and-strings/02-strings/exercises/05/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"
+	"strings"
+	"unicode/utf8"
+)
+
+func main() {
+	msg := os.Args[1]
+	l := utf8.RuneCountInString(msg)
+
+	s := msg + strings.Repeat("!", l)
+
+	fmt.Println(s)
+}

08-numbers-and-strings/02-strings/exercises/06/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
+//  1. Look at the documentation of strings package
+//  2. Find a function that changes the letters into lowercase
+//  3. Get a value from the command-line
+//  4. Print the given value in lowercase letters
+//
+// INPUT
+//  "SHEPARD"
+//
+// EXPECTED OUTPUT
+//  shepard
+// ---------------------------------------------------------
+
+func main() {
+}

08-numbers-and-strings/02-strings/exercises/06/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"
+	"strings"
+)
+
+func main() {
+	fmt.Println(strings.ToLower(os.Args[1]))
+}

08-numbers-and-strings/02-strings/exercises/07/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"
+)
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Look at the documentation of strings package
+//  2. Find a function that trims the spaces from
+//     the given string
+//  3. Trim the text variable and print it
+//
+// EXPECTED OUTPUT
+//  The weather looks good.
+//  I should go and play.
+// ---------------------------------------------------------
+
+func main() {
+	msg := `
+	
+	The weather looks good.
+I should go and play.
+
+
+
+	`
+
+	fmt.Println(msg)
+}

08-numbers-and-strings/02-strings/exercises/07/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"
+	"strings"
+)
+
+func main() {
+	msg := `
+	
+	The weather looks good.
+I should go and play.
+
+
+
+	`
+
+	fmt.Println(strings.TrimSpace(msg))
+}

08-numbers-and-strings/02-strings/exercises/08/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"
+)
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Look at the documentation of strings package
+//  2. Find a function that trims the spaces from
+//     only the right-most part of the given string
+//  3. Trim it from the right part only
+//  4. Print the number of characters it contains.
+//
+// RESTRICTION
+//  Your program should work with unicode string values.
+//
+// EXPECTED OUTPUT
+//  5
+// ---------------------------------------------------------
+
+func main() {
+	// currently it prints 17
+	// it should print 5
+
+	name := "inanç           "
+	fmt.Println(len(name))
+}

08-numbers-and-strings/02-strings/exercises/08/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"
+	"strings"
+	"unicode/utf8"
+)
+
+func main() {
+	name := "inanç           "
+
+	name = strings.TrimRight(name, " ")
+	l := utf8.RuneCountInString(name)
+
+	fmt.Println(l)
+}