MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications télécharger pdf (Page 144)

100

101

Chapter 466

This code outputs:

In this case, the counter variable on the main Timeline is overwritten by the counter variable

within the function. Below is the corrected code, which uses the keyword

counter to declare

both of the variables. Using the counter declaration in the function fixes the bug in the code

above.

var counter = 7;

function loopTest()

{

trace(counter);

for(var counter = 0; counter < 5; counter++)

{

trace(counter);

}

trace(counter);

loopTest();

trace(counter);

Using prototypes when creating objects

When creating objects, attach object functions and properties that will be shared across all

instances of the object to the prototype of the object. This ensures that only one copy of each

function exists within memory. As a general rule, do not define functions within the constructor.

This creates a separate copy of the same function for each object instance and unnecessarily wastes

memory. This following example is the best practice for creating an object:

// Best practice for creating an object

MyObject = function()

{

}

MyObject.prototype.name = "";

MyObject.prototype.setName = function(name)

{

this.name = name;

}

MyObject.prototype.getName = function()

{

return this.name;

}

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