ActionScript for Flash MX: The Definitive Guide, Second Edition

Boolean.toString() Method

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Alphabetical Language Reference

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455

Example

var x = 1;

if (Boolean(x)) {

trace("x is true");

}

See Also

The Boolean class; “Datatype Conversion,” in Chapter 3

Boolean Class

wrapper class for primitive Boolean data

Flash 5

Constructor

new Boolean(value)

Arguments

value An expression to be resolved and, if necessary, converted to a Boolean value,

then wrapped in a boolean object. If the

value argument is omitted, the stored

value will be the Boolean

false.

Methods

toString() Convert the value of a Boolean object to a string.

valueOf() Retrieve the primitive value of a Boolean object.

Description

The Boolean class creates a Boolean object, which contains a primitive Boolean value in an

internal property. Boolean objects are used purely for the sake of manipulating and exam-

ining primitive Boolean values using methods of the Boolean class. Hence, a Boolean object

is known as a wrapper object because it simply packages a primitive Boolean value, giving it

some object-like methods. Compare the Boolean class with the String and Number classes,

which similarly wrap string and number primitive values, but with more useful results.

For the most part, Boolean objects are used internally. They are created automatically by

the interpreter whenever a method is invoked on a primitive