[Javascript] Try and Catch Question

[Terry Bader]

Take the fight off list.

Thanks...

~Terry

----------------------------------------
From: "Scott Reynen" <scott at randomchaos.com>
Sent: Tuesday, March 10, 2009 11:36 AM
To: "JavaScript List" <javascript at lists.evolt.org>
Subject: Re: [Javascript] Try and Catch Question 

On [Mar 10], at [ Mar 10] 8:28 , Troy III Ajnej wrote:

> ECMAScript is not a brower Script.

There's certainly a difference between spec and implementation, but  
you seem to be wrong in both contexts, so I don't see how that's  
relevant.  Can you point to a single browser that treats catch like  
other functions?  For example, do any browsers return "function" for  
typeof catch?  Or allow you to assign catch to a variable?  Or really  
do anything resembling a function beyond taking parameters?  Do you  
also contend if, while, and for are functions?

> In addition:The try\catch()\finally algo is still, not a part of ECMA.

It's in the ECMAScript spec, right where Benjamin pointed to it.

>> All "functions" in ECMAScript are objects. "catch" is not an object.
>
> False...

If you read the ECMAScript spec, you'll find this:

> 10.1.1 Function Objects
> There are two types of Function objects:
> . Program functions are defined in source text by a  
> FunctionDeclaration or created dynamically either
> by using a FunctionExpression or by using the built-in Function  
> object as a constructor.
> . Internal functions are built-in objects of the language, such as  
> parseInt and Math.exp. An
> implementation may also provide implementation-dependent internal  
> functions that are not described
> in this specification. These functions do not contain executable  
> code defined by the ECMAScript
> grammar, so they are excluded from this discussion of execution  
> contexts.

That covers all of the different functions you mentioned, and they're  
all objects.

> Every object is not a function

No one said they were.

> and not all (buillt in) functions may be
>
> objects.

  Can you point to anything beyond your own words supporting your  
arguments?

Peace,
Scott

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