MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE

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40 ActionScript language elements

Example

trace(Boolean(-1)); // output: true

trace(Boolean(0)); // output: false

trace(Boolean(1)); // output: true

trace(Boolean(true)); // output: true

trace(Boolean(false)); // output: false

trace(Boolean("true")); // output: true

trace(Boolean("false")); // output: true

trace(Boolean("Craiggers")); // output: true

trace(Boolean("")); // output: false

If files are published for Flash Player 6 and earlier, the results differ for three of the preceding

examples:

trace(Boolean("true")); // output: false

trace(Boolean("false")); // output: false

trace(Boolean("Craiggers")); // output: false

This example shows a significant difference between use of the Boolean() function and the

Boolean class. The

Boolean() function creates a Boolean value, and the Boolean class creates

a Boolean object. Boolean values are compared by value, and Boolean objects are compared by

reference.

// Variables representing Boolean values are compared by value

var a:Boolean = Boolean("a"); // a is true

var b:Boolean = Boolean(1); // b is true

trace(a==b); // true

// Variables representing Boolean objects are compared by reference

var a:Boolean = new Boolean("a"); // a is true

var b:Boolean = new Boolean(1); // b is true

trace(a == b); // false

MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE - Call Function