first

course/11-pointers/exercises/4-nil_dereference/complete.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func removeProfanity(message *string) {
+	if message == nil {
+		return
+	}
+	messageVal := *message
+	messageVal = strings.ReplaceAll(messageVal, "dang", "****")
+	messageVal = strings.ReplaceAll(messageVal, "shoot", "*****")
+	messageVal = strings.ReplaceAll(messageVal, "heck", "****")
+	*message = messageVal
+}
+
+// don't touch below this line
+
+func test(messages []string) {
+	for _, message := range messages {
+		if message == "" {
+			removeProfanity(nil)
+			fmt.Println("nil message detected")
+		} else {
+			removeProfanity(&message)
+			fmt.Println(message)
+		}
+	}
+}
+
+func main() {
+	messages := []string{
+		"well shoot, this is awful",
+		"",
+		"dang robots",
+		"dang them to heck",
+		"",
+	}
+
+	messages2 := []string{
+		"well shoot",
+		"",
+		"Allan is going straight to heck",
+		"dang... that's a tough break",
+		"",
+	}
+
+	test(messages)
+	test(messages2)
+
+}