* David Bruant wrote:
>One (minor) annoyance with forEach/map, etc. is that the enumeration
>"can't" be stopped until all elements have been traversed which doesn't
>suit every use case. One hack to stop the enumeration is to throw an
>error but that requires to wrap the .forEach call in a try/catch block
>which is annoying too for code readability.
>
>The iterator protocol defines the StopIteration value. What about
>reusing this value in the context of array extras?
Using exceptions for normal flow control seems like a bad idea to me.
> (function(){
> [2, 8, 7].forEach(function(e){
> if(e === 8)
> throw StopIteration;
> console.log(e)
> })
>
> console.log('yo')
> })();
Languages like Haskell and C# would use `takeWhile` for this purpose,
so you would have something like
[2, 8, 7].takeWhile(x => x !== 8).forEach(x => console.log(e));
That seems much better to me.
--
Björn Höhrmann · mailto:[email protected] · http://bjoern.hoehrmann.de
Am Badedeich 7 · Telefon: +49(0)160/4415681 · http://www.bjoernsworld.de
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