Data update

Task/Classes/EMal/classes.emal

@@ -9,7 +9,7 @@ model # instance context
    | Every value passed to the constructor sets the instance variable
    | according to the order.
    |^
-  fun makeNoise = void by block # method of Bear
+  fun makeNoise ← void by block # method of Bear
     writeLine("Growl!")
   end
 end
@@ -17,14 +17,14 @@ type Cat
 model
   text noise
   new by text noise # an explicit constructor
-    me.noise = noise # we must use me to access instance variables
+    me.noise ← noise # we must use me to access instance variables
   end
-  fun makeNoise = void by block
+  fun makeNoise ← void by block
     writeLine(me.noise)
   end
 end
 type Main
-Bear bear = Bear("Bruno") # creating a new instance
-writeLine("The bear is called " + bear.name)
+Bear bear ← Bear("Bruno") # creating a new instance
+writeLine("The bear is called ", bear.name)
 bear.makeNoise()
 Cat("Meow").makeNoise()

Task/Classes/V-(Vlang)/classes-1.v

@@ -0,0 +1,21 @@
+// In this example, the can_register method has a receiver of type 'User' named 'u'.
+
+struct User {
+	age int
+}
+
+// 'can_register' is a method of the 'User' struct above
+
+fn (u User) can_register() bool {
+	return u.age > 16
+}
+
+user := User{
+	age: 10
+}
+println(user.can_register()) // "false"
+
+user2 := User{
+	age: 20
+}
+println(user2.can_register()) // "true"

Task/Classes/V-(Vlang)/classes-2.v

@@ -0,0 +1,26 @@
+// Embedded structs
+
+struct Size {
+	mut:
+	width  int
+	height int = 2
+}
+
+fn (s &Size) area() int {
+	return s.width * s.height
+}
+
+// The 'Size' struct is embedded into the 'Button' struct
+
+struct Button {
+	Size
+	title string = "Click me"
+}
+
+// With embedding, the struct 'Button' will get all the fields and methods from struct 'Size'
+
+mut button := Button{}
+button.width = 3
+
+println("${button.Size.area()}")  // 'Size' struct methods can be used by the 'Button' struct
+println("${button.area()}")  // You can use the method names directly

Task/Classes/V-(Vlang)/classes-3.v

@@ -0,0 +1,7 @@
+struct User {}
+
+fn User.new() User {
+	return User{}
+}
+
+user := User.new()

Task/Classes/V-(Vlang)/classes-4.v

@@ -0,0 +1,35 @@
+// 'pub'
+
+pub struct Public {
+	pub:
+	data string
+}
+
+struct Private {
+	data string
+}
+
+pub fn public_function() {}
+
+fn private_function() {}
+
+// '@[noinit]'
+
+module sample
+
+@[noinit]
+pub struct Information {
+pub:
+	data string
+}
+
+// factory function
+
+pub fn new_information(data string) !Information {
+	if data.len == 0 || data.len > 100 {
+		return error("data must be between 1 and 100 characters")
+	}
+	return Information{
+		data: data
+	}
+}