[Resolvido] Eval

[Thiago Bittencourt 0]

Olá Galera,

 

alguém sabe me dizer pra que ser o Eval?

 

mc = eval("fotoHolder"+i);

abraços

[Thiago de Oliveira Cruz 21]

bom amigo eu sou preguiçoso...

 

e sou americano e to com preguiça de traduzir

 

eval function

eval(expression:Object) : Object

eval(expression:String) : Object

 

 

Accesses variables, properties, objects, or movie clips by name. If expression is a variable or a property, the value of the variable or property is returned. If expression is an object or movie clip, a reference to the object or movie clip is returned. If the element named in expression cannot be found, undefined is returned.

 

In Flash 4, eval() was used to simulate arrays; in Flash 5 or later, you should use the Array class to simulate arrays.

 

In Flash 4, you can also use eval() to dynamically set and retrieve the value of a variable or instance name. However, you can also do this with the array access operator ([]).

 

In Flash 5 or later, you cannot use eval() to dynamically set and retrieve the value of a variable or instance name, because you cannot useeval() on the left side of an equation. For example, replace the code

 

eval ("var" + i) = "first";

 

with this:

 

this["var"+i] = "first"

 

or this:

 

set ("var" + i, "first");

 

Availability: ActionScript 1.0; Flash Player 5 - Flash Player 5 or later for full functionality. You can use the eval() function when exporting to Flash Player 4, but you must use slash notation and can access only variables, not properties or objects.

 

Parameters

expression:Object - The name of a variable, property, object, or movie clip to retrieve. This parameter can be either a String or a direct reference to the object instance (i.e use of quotation marks (" ") is optional.)

 

Returns

Object - A value, reference to an object or movie clip, or undefined .

 

Example

The following example uses eval() to set properties for dynamically named movie clips. This ActionScript sets the _rotation property for three movie clips, called square1_mc, square2_mc, and square3_mc.

 

for (var i = 1; i <= 3; i++) {

setProperty(eval("square"+i+"_mc"), _rotation, 5);

}

 

 

You can also use the following ActionScript:

 

for (var i = 1; i <= 3; i++) {

this["square"+i+"_mc"]._rotation = -5;

}

 

 

Isso que significa eval...

 

Divirta-se

[Mário Monteiro 179]

ele interpreta uma string com um codigo valido

 

ou seja na pratica ela faz uma string se transformar no codigo que ela guarda

 

Nao sei se fui claro mas veja este exemplo em ASP

http://forum.imasters.com.br/index.php...amp;pid=1036194

 

Em PHP seria

http://www.master.iag.usp.br/manuais/php/b...ction.eval.html

 

Em javascript algo como

Eval ("ie.document.form.chkimp"+ i +".checked")

 

Em AS deve ser o mesmo

 

Veja se ajuda

[Thiago Bittencourt 0]

Valew rapaziada =]

 

me ajudaram bastante!

 

abraçosssssssss

[Mário Monteiro 179]

Que bom que ajudou