_first() Method - Object Initialization

This section describes the _first() method for object initialization.

The _first() method is for object initialization during the new object construction process. To write the _first() method, you need to follow these rules:

Example of specifying the _first() method:

$class user: {
   $instance x: {
      $method x._first(l="guest", p="DontTell"): {
         x.login = l;
		 x.password = p;
      $method x.changePassword(newPassword): {
         x.password = newPassword;
      $method x.showPassword(): {

u = user(); # _first() is called with default arguments

u = user("herong"); # _first() is called with a positioned argument

u = user(p="******"); # _first() is called with named argument

Table of Contents

 About This Book

 Introduction of H Language


 Data Types




 "boolean" Data Type

 "integer" Data Type

 "string" Data Type

 "real" Data Type

 "array" Data Type

 Source Code Packages

Classes and Objects

 What Is Class

 What Is Object

 $class Statement - Create New Classes

 Class Variables and Functions

 Execution of $class Definition Body

 __new() - Object Constructor Function

 $instance Statement - Define Instance Template

 Execution of $instance Definition Body

 Access Object Properties

 $method Statement - Define Object Method

 Access Object Methods

_first() Method - Object Initialization

 Access Class Variables from Object Methods

 __delete() - Object Destructor Method

 $delete Statement - Delete Objects

 _last() Method - Object Cleanup

 Object Oriented Programming

 Inheritance - Object Attachments

 Encapsulation - Private Members


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