Avoiding reserved words and language constructs

When naming instances and variables, avoid using reserved words, which can cause errors in your code. Reserved words include keywords in the ActionScript language.

Also, do not use any word in the ActionScript 2.0 languages (called a language construct) as an instance or variable name. ActionScript constructs include class names, component class names, method and property names, and interface names.

WARNING

Never use different cases to avoid conflicting with reserved words. For example, naming an instance of the textfield TextField class (which doesn't conflict with TextField because Flash is case-sensitive) is a poor coding practice.

The following table lists reserved keywords in ActionScript 2.0 that cause errors in your scripts when used as variable names:

add	and	break	case
catch	class	continue	default
delete	do	dynamic	else
eq	extends	false	finally
for	function	ge	get
gt	if	ifFrameLoaded	implements
import	in	instanceof	interface
intrinsic	le	it	ne
new	not	null	on
onClipEvent	or	private	public
return	set	static	super
switch	tellTarget	this	throw
try	typeof	undefined	var
void	while	with

The following words are reserved for future use in Flash, from the ECMAScript (ECMA-262) edition 4 draft language specification. Avoid using these words because they might be used in future releases of Flash.

as	abstract	Boolean	bytes
char	const	debugger	double
enum	export	final	float
goto	is	long	namespace
native	package	protected	short
synchronized	throws	transient	use
volatile

Flash CS3

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