ActionScript for Flash MX: The Definitive Guide, Second Edition

int() Global Function

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Alphabetical Language Reference

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instanceof Operator

determines whether an object is an instance of a given class

Flash 6

object instanceof classConstructor

Operands

object Any object.

classConstructor

A reference to any class’s constructor function.

Returns

The Boolean true if object is an instance of classConstructor; otherwise, it returns false.

Usage

The instanceof operator does not take parentheses (it is an operator, not a function).

Example

var now = new Date();

trace(now instanceof Date); // Displays: true

See Also

typeof; the Constructor subheading for the Date class; Chapter 12; “The instanceof Oper-

ator” in Chapter 5

int() Global Function

truncate the decimal portion of a number

Flash 4; deprecated in Flash 5 in favor of analogous Math methods

int(number)

Arguments

number A number or an expression that yields a number, typically with a fractional

(decimal) portion.

Returns

The integer portion of number.

Description

The int( ) function was used in Flash 4 to extract the integer portion of a number. It effec-

tively rounds positive numbers down and rounds negative numbers up. The int( ) function

works only for numbers in the range –2147483648 (–2

31

) to 2147483647 (2

31

–1); it

produces

undefined results for numbers outside this range. If number is a string composed of ...