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Write a function called fun which has an object as its parameter and returns the name...

Write a function called fun which has an object as its parameter and returns the name of properties of that object in an array. For instance, if it receives {a:1,b:3}, as its parameter, it should return [a, b], or if it receives {u:4, k:3, h:5}, it should return [u, k, h].

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