> Dmitry Soshnikov wrote: >> >> Will the "Existential Operator" for properly accessors be something >> interesting to consider for ES7 spec? Currently CoffeeScript uses it well. > > Please see > > http://esdiscuss.org/topic/sept-18-tc39-meeting-notes#content-2 > > and find "ARB: This is non-compositional".
David seems to suggest a compositional version: `o?.p?.q?.r` I’m assuming that the left-hand side of `value?.prop` is an arbitrary value and that the property access is only made if that value is neither `undefined` nor `null`. AFAICT that’s also how CoffeeScript’s existential operator works. I’m ambivalent about it, though: it would be useful, but would also add complexity to the language. -- Dr. Axel Rauschmayer a...@rauschma.de rauschma.de
_______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
