Contenido del Curso
Object-Oriented Programming in JavaScript
Object-Oriented Programming in JavaScript
Class Methods
Methods are functions that describe the class in some way. Real Students can do actions like studying, sleeping, talking, etc, so we can define it as methods of the class:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } } s = new Student(); s.sleep();
We added method sleep()
, which prints a message.
This method is trivial, but in general, methods can also be used for:
- Changing some attribute’s value
- Extracting some attribute’s value
- Calling other methods inside
- Printing something to the console etc.
Let’s demonstrate it and add the method happyBirthday()
. This method increases age of the student and prints some info about it:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } happyBirthday(){ this.age += 1; console.log('Today is my birthday!'); } } s = new Student(); s.happyBirthday();
You can store some function arguments.
// method of the class happyBirthday(newAge){ this.age = newAge; console.log('Today is my birthday!'); }
Tarea
Modify sleep()
method: store argument hours
in it and output the message: 'I am going to sleep for '+hours+' hours'
instead of the current message inside this method.
Actually you already met attributes and methods in other objects. For example,
length
is a attribute of some object of the classarray
. In theconsole.log()
,console
is a class to write some data to the stream, andlog()
is a method, that prints your data (like 'hello world') to the stream.
¡Gracias por tus comentarios!
Class Methods
Methods are functions that describe the class in some way. Real Students can do actions like studying, sleeping, talking, etc, so we can define it as methods of the class:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } } s = new Student(); s.sleep();
We added method sleep()
, which prints a message.
This method is trivial, but in general, methods can also be used for:
- Changing some attribute’s value
- Extracting some attribute’s value
- Calling other methods inside
- Printing something to the console etc.
Let’s demonstrate it and add the method happyBirthday()
. This method increases age of the student and prints some info about it:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } happyBirthday(){ this.age += 1; console.log('Today is my birthday!'); } } s = new Student(); s.happyBirthday();
You can store some function arguments.
// method of the class happyBirthday(newAge){ this.age = newAge; console.log('Today is my birthday!'); }
Tarea
Modify sleep()
method: store argument hours
in it and output the message: 'I am going to sleep for '+hours+' hours'
instead of the current message inside this method.
Actually you already met attributes and methods in other objects. For example,
length
is a attribute of some object of the classarray
. In theconsole.log()
,console
is a class to write some data to the stream, andlog()
is a method, that prints your data (like 'hello world') to the stream.
¡Gracias por tus comentarios!
Class Methods
Methods are functions that describe the class in some way. Real Students can do actions like studying, sleeping, talking, etc, so we can define it as methods of the class:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } } s = new Student(); s.sleep();
We added method sleep()
, which prints a message.
This method is trivial, but in general, methods can also be used for:
- Changing some attribute’s value
- Extracting some attribute’s value
- Calling other methods inside
- Printing something to the console etc.
Let’s demonstrate it and add the method happyBirthday()
. This method increases age of the student and prints some info about it:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } happyBirthday(){ this.age += 1; console.log('Today is my birthday!'); } } s = new Student(); s.happyBirthday();
You can store some function arguments.
// method of the class happyBirthday(newAge){ this.age = newAge; console.log('Today is my birthday!'); }
Tarea
Modify sleep()
method: store argument hours
in it and output the message: 'I am going to sleep for '+hours+' hours'
instead of the current message inside this method.
Actually you already met attributes and methods in other objects. For example,
length
is a attribute of some object of the classarray
. In theconsole.log()
,console
is a class to write some data to the stream, andlog()
is a method, that prints your data (like 'hello world') to the stream.
¡Gracias por tus comentarios!
Methods are functions that describe the class in some way. Real Students can do actions like studying, sleeping, talking, etc, so we can define it as methods of the class:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } } s = new Student(); s.sleep();
We added method sleep()
, which prints a message.
This method is trivial, but in general, methods can also be used for:
- Changing some attribute’s value
- Extracting some attribute’s value
- Calling other methods inside
- Printing something to the console etc.
Let’s demonstrate it and add the method happyBirthday()
. This method increases age of the student and prints some info about it:
class Student{ name; university; age; gpa; sleep(){ console.log('I am sleeping right now!'); } happyBirthday(){ this.age += 1; console.log('Today is my birthday!'); } } s = new Student(); s.happyBirthday();
You can store some function arguments.
// method of the class happyBirthday(newAge){ this.age = newAge; console.log('Today is my birthday!'); }
Tarea
Modify sleep()
method: store argument hours
in it and output the message: 'I am going to sleep for '+hours+' hours'
instead of the current message inside this method.
Actually you already met attributes and methods in other objects. For example,
length
is a attribute of some object of the classarray
. In theconsole.log()
,console
is a class to write some data to the stream, andlog()
is a method, that prints your data (like 'hello world') to the stream.