lists

lists-practice/go.mod

@@ -0,0 +1,3 @@
+module example.com/lists-practice
+
+go 1.23.1

lists-practice/lists.go

@@ -0,0 +1,54 @@
+package main
+
+import "fmt"
+
+type Product struct {
+	id string
+	title string
+	price float64
+}
+
+func main() {
+	hobbies := [3]string{"Sports", "Cooking", "Reading"}
+	fmt.Println(hobbies)
+
+	fmt.Println(hobbies[0])
+	fmt.Println(hobbies[1:3])
+
+	mainHobbies := hobbies[:2]
+	fmt.Println(mainHobbies)
+
+	fmt.Println(cap(mainHobbies))
+	mainHobbies = mainHobbies[1:3]
+	fmt.Println(mainHobbies)
+
+	courseGoals := []string{"Learn Go", "Learn all the basics"}
+	fmt.Println(courseGoals)
+
+	courseGoals[1] = "Learn all the details"
+	courseGoals = append(courseGoals, "Learn all the stuff")
+	fmt.Println(courseGoals)
+
+	products := []Product{
+		{
+			"first-product", 
+			"A first product", 
+			12.99,
+		},
+		{
+			"second-product",
+			"A second product",
+			129.99,
+		},
+	}
+
+	fmt.Println(products)
+
+	newProduct := Product{
+		"third-product",
+		"A third product",
+		15.99,
+	}
+
+	products = append(products, newProduct)
+}

lists/go.mod

@@ -0,0 +1,3 @@
+module example.com/lists
+
+go 1.23.1

lists/main.go

@@ -0,0 +1,33 @@
+package main
+
+import "fmt"
+
+type floatMap map[string]float64
+
+func (m floatMap) output() {
+	fmt.Println(m)
+}
+
+func main() {
+	 userNames := make([]string, 2, 5)
+
+	 userNames[0] = "Julie"
+
+	 userNames = append(userNames, "Max")
+	 userNames = append(userNames, "Manuel")
+	 
+	fmt.Println(userNames)
+
+	courseRatings := make(floatMap, 3)
+
+	courseRatings["go"] = 4.7
+	courseRatings["react"] = 4.8
+	courseRatings["angular"] = 4.7
+
+	courseRatings.output()
+
+	for index, value := range userNames {
+		fmt.Println("Index:", index)
+		fmt.Println("Value:", value)
+	}
+}

lists/maps/maps.go

@@ -0,0 +1,18 @@
+package maps
+
+import "fmt"
+
+func main() {
+	websites := map[string]string{
+		"Google": "https://google.com",
+		"Amazon Web Services": "https://aws.com",
+	}
+	fmt.Println(websites)
+	fmt.Println(websites["Amazon Web Services"])
+
+	websites["LinkedIn"] = "https://linkedin.com"
+	fmt.Println(websites)
+
+	delete(websites, "Google")
+	fmt.Println(websites)
+}

lists/slices/lists.go

@@ -0,0 +1,35 @@
+package lists
+
+import "fmt"
+
+func main () {
+	prices := []float64{10.99, 8.99}
+	fmt.Println(prices[0:1])
+	prices[1] = 9.99
+
+	prices = append(prices, 5.99, 12.99, 29.99, 100.10)
+	prices = prices[1:]
+	fmt.Println(prices)
+
+	discountedPrices := []float64{101.99, 80.99, 20.99}
+	prices = append(prices, discountedPrices...)
+	fmt.Println(prices)
+}
+
+// func main() {
+// 	 var productNames [4]string = [4]string{"A book"}
+// 	 prices := [4]float64{10.99, 9.99, 45.99, 20.0}
+// 	 fmt.Println(prices)
+// 	 fmt.Println(productNames)
+
+// 	 productNames[2] = "A carpet"
+
+// 	 fmt.Println(prices[2])
+
+// 	 featuredPrices := prices[1:]
+// 	 featuredPrices[0] = 199.99
+// 	 highlightedPrices := featuredPrices[:1]
+// 	 fmt.Println(highlightedPrices)
+// 	 fmt.Println(prices)
+// 	 fmt.Println(len(highlightedPrices), cap(highlightedPrices))
+// }

structs-practice/main.go

@@ -2,31 +2,72 @@ package main
 
 import (
 	"bufio"
-	"fmt"
 	"example.com/note/note"
+	"example.com/note/todo"
+	"fmt"
 	"os"
 	"strings"
 )
 
+type saver interface {
+	Save() error
+}
+
+// type displayer interface {
+// 	Display()
+// }
+
+type outputtable interface {
+	saver
+	Display()
+}
+
+// type outputtable interface {
+// 	Save() error
+// 	Display()
+// }
+
 func main() {
 	title, content := getNoteData()
+	todoText := getUserInput("Todo text: ")
 
-	userNote, err := note.New(title, content)
+	todo, err := todo.New(todoText)
 
 	if err != nil {
 		fmt.Println(err)
 		return
 	}
 
-	userNote.Display()
-	err = userNote.Save()
+	userNote, err := note.New(title, content)
 
 	if err != nil {
-		fmt.Println("Saving the note failed")
 		return
 	}
 
+	err = outputData(todo)
+
+	if err != nil {
+		return
+	}
+
+	outputData(userNote)
+}
+
+func outputData(data outputtable) error {
+	data.Display()
+	return saveData(data)
+}
+
+func saveData(data saver) error {
+	err := data.Save()
+
+	if err != nil {
+		fmt.Println("Saving the note failed")
+		return err
+	}
+
 	fmt.Println("Saving the note succeeded!")
+	return nil
 }
 
 func getNoteData() (string, string) {

structs-practice/todo/todo.go

@@ -0,0 +1,38 @@
+package todo
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+)
+
+type Todo struct {
+	Text string `json:"text"`
+}
+
+func (todo Todo) Display() {
+	fmt.Printf(todo.Text)
+}
+
+func (todo Todo) Save() error {
+	fileName := "todo.json"
+
+	json, err := json.Marshal(todo)
+
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(fileName, json, 0644)
+}
+
+func New(content string) (Todo, error) {
+	if content == "" || content == "" {
+		return Todo{}, errors.New("Invalid input")
+	}
+
+	return Todo{
+		Text: content,
+	}, nil
+}