class instance from string

[Kristoph]

Greetings,

I have a String instance which contains the name of a class. Is there
some way I can instantiate that class from given the class name in the
string?

Many Thanks, in advance, for any assistance,

Kristoph

[Michael White]

Kristoph wrote:

Greetings,

I have a String instance which contains the name of a class. Is there
some way I can instantiate that class from given the class name in the
string?

Probably. Need more info, though. Class as in CSS, or Class as a js concept?
"Instantiate"? In what context?
So many questions...
Mick

[Geoff Stearns]

I have a String instance which contains the name of a class. Is there

some way I can instantiate that class from given the class name in the
string?

If you are trying to do what I think you are, there's a few ways you
can do it.

Here's two examples:

// set up the class
function MyClass() {
this.foo = "bar";
}

// store the class name in a string
var classIdString = "MyClass";

// first method
var classInstance = new this[classIdString];

// second method
var classInstance2 = eval("new "+ classIdString);

// test them
alert(classInstance.foo);
alert(classInstance2.foo);

[Kristoph]

On Mar 17, 5:02 pm, "Geoff Stearns" <[e-mail]:

I have a String instance which contains the name of a class. Is there
some way I can instantiate that class from given the class name in the
string?

If you are trying to do what I think you are, there's a few ways you
can do it.

Here's two examples:

// set up the class
function MyClass() {
this.foo = "bar";

}

// store the class name in a string
var classIdString = "MyClass";

// first method
var classInstance = new this[classIdString];

// second method
var classInstance2 = eval("new "+ classIdString);

// test them
alert(classInstance.foo);
alert(classInstance2.foo);

var classInstance = this[classIdString];

.... that's exactly what I was looking for

Thank you very much.

]{

[Evertjan.]

Kristoph wrote on 18 mrt 2007 in comp.lang.javascript:

On Mar 17, 5:02 pm, "Geoff Stearns" <[e-mail]:

>var classInstance = new this[classIdString];

>
var classInstance = this[classIdString];

... that's exactly what I was looking for

May be, but that was not what was suggested

--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)