On Apr 4, 2005 11:15 PM, Dave Merrill <[EMAIL PROTECTED]> wrote:
> >
> > <cffunction name="bar">
> > <cfset foo = 42>
> > </cffunction>
>
> Understood, but what's odd is that vars declared inside a function escape to
> the outside at all...
The variable isn't actually "declared" unless you use the var keyword.
Look at the same function in Java.
void bar () {
foo = 42;
}
The variable foo is not local to bar() because it wasn't declared
inside bar(), like so:
void bar () {
int foo = 42;
}
However, if foo wasn't declared within bar() it must have been
declared somewhere else (in the body of the class).
That's the difference between Java and ColdFusion. Pre-CF5, ColdFusion
didn't have any concept of declaring variables, and still doesn't for
the most part. When functions were introduced, Allaire needed a way to
make variables local to a function, so they introduced the var keyword
for that specific purpose.
Personally, I think adding another scope (local.foo or function.foo)
would have been more consistent.
Patrick
--
Patrick McElhaney
704.560.9117
http://pmcelhaney.weblogs.us
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