maps, interfaces, structs

interfaces/go.mod

@@ -0,0 +1,3 @@
+module interfaces
+
+go 1.17

interfaces/main.go

@@ -0,0 +1,29 @@
+package main
+
+import "fmt"
+
+type bot interface {
+	getGreeting() string
+}
+
+type englishBot struct{}
+type spanishBot struct{}
+
+func main() {
+	eb := englishBot{}
+	sb := spanishBot{}
+	printGreeting(eb)
+	printGreeting(sb)
+}
+
+func printGreeting(b bot) {
+	fmt.Println(b.getGreeting())
+}
+
+func (englishBot) getGreeting() string {
+	return "Hi there!"
+}
+
+func (spanishBot) getGreeting() string {
+	return "Hola!"
+}

interfaces_http/go.mod

@@ -0,0 +1,3 @@
+module interfaces_http
+
+go 1.17

interfaces_http/main.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+func main() {
+	resp, err := http.Get("https://google.com")
+	if err != nil {
+		fmt.Println("Error!")
+		os.Exit(1)
+	}
+	fmt.Println(resp)
+}

map/go.mod

@@ -0,0 +1,3 @@
+module map
+
+go 1.17

map/main.go

@@ -0,0 +1,28 @@
+package main
+
+import "fmt"
+
+func main() {
+	// Method 1
+	//var colors map[string]string
+
+	// Method2
+	//colors := make(map[string]string)
+
+	colors := map[string]string{
+		"red":   "#ff0000",
+		"green": "#gr0000",
+		"white": "#fffff",
+	}
+
+	//colors["white"] = "#ffffff"
+
+	//delete(colors, "white")
+	printMap(colors)
+}
+
+func printMap(c map[string]string) {
+	for color, hex := range c {
+		fmt.Println("Hex code for", color, "is", hex)
+	}
+}

structs/main.go

@@ -22,7 +22,7 @@ func main() {
 			zipCode: 1234,
 		},
 	}
-	(&person1).updateName("asd")
+	person1.updateName("asd")
 	person1.print()
 }