how to get the list of local variables

[schettino72]

hi,

how can i get a list of all local variables defined in a function?

cheers,
Eduardo

 

[Thomas 'PointedEars' Lahn]

how can i get a list of all local variables defined in a function?

There is no access to the local Variable Object. So you would have to rely
on parsing the string representation of the Function object, which is left
as an exercise to the reader.


PointedEars

 

[Evertjan.]

schettino72 wrote on 23 aug 2007 in comp.lang.javascript:

how can i get a list of all local variables defined in a function?

You cannot, I think, not with js that is.

Why would you need that for?

 

[schettino72]

Thanks for the replies guys.

Why would you need that for?

I writing a unit test framework for javascript. Test cases are
defined by extending my TestCase base class. I want to automatically
find all defined test cases, so I need to introspect the code
somehow.
I solved my problem putting the test cases out of my "function" and
doing

for (var o in top){
....

 

[Thomas 'PointedEars' Lahn]

I writing a unit test framework for javascript. Test cases are
defined by extending my TestCase base class.

Chance is that there is no class.

I want to automatically find all defined test cases, so I need
to introspect the code somehow.
I solved my problem putting the test cases out of my "function" and
doing

for (var o in top){
....

Given that the `in' operator is not supported before JavaScript 1.4,
JScript 5.0, ECMAScript 3, and that `top' is a host-defined property of
the Global Object, are you sure the results your test framework yields
are always correct?


PointedEars

 

[schettino72]

Given that the `in' operator is not supported before JavaScript 1.4,

JScript 5.0, ECMAScript 3,

I am not worried about this...

and that `top' is a host-defined property of
the Global Object,

this was quick and dirty. i will probably load them in my own object/
namespace

are you sure the results your test framework yields
are always correct?

it worked fine with what i have in hand. but "always" is a too strong
word

thanks for your comments.
eduardo

 

[Thomas 'PointedEars' Lahn]

this was quick and dirty. i will probably load them in my own object/
namespace

You can use `this' for referring to the global execution context in the
local execution context. You can then assign `this' to a global variable
and then use that variable locally.

var _global = this;

function ...()
{
... _global ...
}

However, using a user-defined object instead is a Good Idea[tm].

Please always provide attribution of quoted material.


Regards,

PointedEars