Message from JavaScript discussions

September 2017

— Https://blog.campvanilla.com/javascript-the-curious-case-of-null-0-7b131644e274

The blog. Not a plug.

Message permanent page

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When you use Object.getOwnPropertyNames(array) you actually know 'something' (even undefined) is on that position.

— How slow is that

— I dont think that much, give it a try

— I was reading the ecma to give this intel

— Http://www.ecma-international.org/ecma-262/6.0/#sec-array-exotic-objects-defineownproperty-p-desc

— Object.getOwnPropertyDescriptors is more useful on single call

— Because it returns the value

— Holy shit that's slow as hell

— I wonder if it's the sparseness

— Non-sparse

— Still slow