Joy Command Reference

Table of Contents

		Core JavaScript
		Introduction to Joy Extensions
		Expressions
		Statements
		Object Types
		Global Functions
		Global Variables

Core JavaScript

Documentation for the core JavaScript language is available from Netscape's web site. Follow the links below. If you are using HelpViewer you should switch to OmniWeb now. JavaScript Guide JavaScript Reference The Joy language is implemented as a set of extensions to core JavaScript. This functionality was originally developed for writing intelligent web pages. Now it is available for scripting Objective-C and Java objects with Joy. Please note, however, that as JavaScript was designed for, and documented as, a language for web programming, some of the examples in the documentation are web related. For example, some examples print HTML code as output, which is expected to be interpreted by a web browser. Under Joy, however, the HTML code will simply get printed to the console. Also, objects that are provided by the browser, like Document, don't exist in Joy. Also, please note, that Visual JavaScript and the JavaScript debugger are not products produced or supported by AAA+ Software. It is unlikely that either will be compatible with the scripts that are written with Joy, as Joy has significantly extended the JavaScript functionality and syntax. One last caveat concerns the naming of the Java classes in LiveConnect (the JavaScript/Java interface): To avoid clashes with other software that wants to use the original LiveConnect from Netscape as opposed to the one modified by AAA+, all the netscape.javascript.* classes have been renamed to aaaplus.javascript.* in Joy.

Introduction to Joy Extensions

Objective-C Literals - Objective C-style literal constants Preprocessor Features - Macros, header files, and conditional compilation Additional Operators - JavaScript operators added by Joy Data Types - Mapping between Objective-C and JavaScript data types Exception Handling - Handling of Objective-C exceptions and JavaScript errors Differences between Joy and ECMA JavaScript Differences between Joy and Objective-C

Expressions

Objective-C Message Expression @selector - Objective-C selector expression @protocol - Objective-C protocol expression @encode - Objective-C type encoding expression

Statements

Objective C-Style Declarations - Declaring variables, functions, and types NS_DURING...NS_HANDLER - Exception handling @class - Create a new Objective-C class @teach - Teach new methods to an existing Objective-C class or object @protocol - Create a new Objective-C protocol @interface - Declare the interface for an Objective-C class or category @implementation - Implement an Objective-C class or category

Object Types

ObjC - Provides some functions to interface with the Objective-C runtime Java - Provides some functions to interface with the Java runtime Id - Represents an Objective-C id Pointer - Represents a pointer Struct - Represents a C struct Union - Represents a C union LongLong - Represents a C long long UnsignedLongLong - Represents a C unsigned long long

Global Functions

gc- Run the garbage collector help - Joy online manual source - Load files named by string arguments precompile - Precompile an Objective-C header file for faster #import into Joy print - Print to standard output po - Print Objective-C object's description to standard output version - Get or set JavaScript version number

Global Variables

self - Current interpreter mainInterp - Main interpreter