$trim Statement - Detach Objects

This section describes the $trim statement for detaching appended objects from the current object.

The $trim statement for detaching the last appended object from the current object using the following syntax:

$trim object_reference;

Examples of using $trim statements:

$class person: {
   $instance x: {
      x.name = "John";
	  $method x.changeName(newName): {
	     x.name = newName; 
	  }
   }
}

$class employee: {
   $instance x: {
      x.status = "Part-time";
	  $method x.changeStatus(newStatus): {
	     x.status = newStatus;
	  }
   }
}

e = employee();

$append e $with person();
e.changeName("Herong");
e.changeStatus("Full-time");

$trim e;
e.changeName("Yang"); # gets UnknowMethod error

Design options:

1. Use $trim as the keyword for detaching objects. This makes the "$trim a" statement more readable.

2. Use $detach as the keyword for detaching objects.

Last update: 2017.

Table of Contents

 About This Book

 Introduction of H Language

 Syntax

 Data Types

 Variables

 Expressions

 Statements

 "boolean" Data Type

 "integer" Data Type

 "string" Data Type

 "real" Data Type

 "array" Data Type

 Source Code Packages

 Classes and Objects

 Object Oriented Programming

Inheritance - Object Attachments

 What Is Object Attachment

 $append Statement - Attach Objects

 Name Collision in Attached Objects

 Append Multiple Object Attachments

$trim Statement - Detach Objects

 Build Subclasses with Superclasses

 Object Morphinism by Changing Attachments

 Encapsulation - Private Members

 References

 PDF Printing Version