On Sep 10, 2007, at 2:21 PM, Garrett Smith wrote:
> And my point was that it appears to duplicate functionality of
> hasOwnProperty in a differently named method.
The two functions are different:
js> var Op = Object.prototype;
js> Op.foo = 42;
42
js> print(Op.hasOwnProperty('foo'), Op.propertyIsEnumerable('foo'));
true true
js> print(Op.hasOwnProperty('toString'), Op.propertyIsEnumerable
('toString'));
true false
> The fact that the method
> was called propertyIsEnumerable instead of isPropertyEnumerable is not
> great, but the way propertyIsEnumerable is designed is confusing to
> developers.
I've never heard that complaint directly, or in a
bugzilla.mozilla.org report. Can you cite complaints anywhere on the
web? I believe you, but it would be good to have evidence.
> propertyIsEnumerable and hasOwnProperty are interchangeable (in
> conforming hosts, not JScript)
This statement is false.
/be
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