JSON.parse() and object literals are big sources of objects-as-maps. In both of these cases, using the `in` operator won't give the right answer.
Le mar. 6 sept. 2016 à 22:11, Domenic Denicola <d...@domenic.me> a écrit : > Reflect is a namespace that contains the proxy traps (it’s a bit of an > unfortunate name), so we shouldn’t be adding things to it that are not part > of the meta-object protocol. > > A new namespace, or using Object, might be OK. I think that it will still > be controversial, since this proposal is in support of an objects-as-maps > programming style which has caused many problems in the past and should not > be encouraged. See e.g. > http://www.2ality.com/2012/11/proto-breaks-webapps.html. > > If you are using objects-as-maps safely, you’d use Object.create(null), in > which case the `in` operator works fine and there's no need for > hasOwnProperty incantations. >
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