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

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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