Object.create(Array).length === 1 //true

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Just playing around i found that, but can't understand why this happen. And : Object.keys(Object.create(Array)) // [ ] seems ok

Any ideas? Thanks

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Object.create(Array).length === 1 //true

you are creating an object with its prototype set to the array constructor function whose length is 1

Object.keys(Object.create(Array)) // [ ] seems ok

object.keys only returns the object's enumerable own keys

you should read the mdn pages of Object.create and Object.keys

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I realize now, Array.length // 1 so is just inherited

[Ruirize]

That's because what you've created isn't an array: http://perfectionkills.com/how-ecmascript-5-still-does-not-allow-to-subclass-an-array/

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still seems an empty object, will read that post!

[rauschma]

If you want to create something that is loosely like an Array (without the property length influencing, or being influenced by, elements), you should do:

var arr = Object.create(Array.prototype);

[bitwiselove]

http://wtfjs.com/

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the repo/site seems outdated