On Thu, May 31, 2012 at 4:44 PM, Allen Wirfs-Brock <[email protected]>wrote:
>
> I don't think I argued that for isBound although I certainly would make
> that argument about arrow functions in general.
>
> In this case, I'm assuming a debugging scenario. Somebody is passing arrow
> functions through an API whose contract requires a callback function that
> is invokable with a dynamic this. I'm trying to find the culprit. So I
> write a function like the above to try to catch it. Or I just put a
> isBound check in the API function.
>
> It's true, that an offending function might be one that was written with a
> dynamic this binding but which never actually references this. That is also
> probably a violation of my contract. So, I may get false negative. But
> there is still a good change that finding positives will solve my debugging
> problem.
>
Thanks for the clarification; I'm not sure I would have guessed that from
this code.
For the purpose you state, given two isBoundOrWhateverItIsNamed functions f
and g where,
* neither has any false positives,
* both obey simple deterministic rules that are easy to understand,
* f has strictly fewer false negatives than g.
Which should you prefer for the purpose of your code?
--
Cheers,
--MarkM
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
