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I've found that some functions like concat() push() every() both exist in Array and Array.prototype(with firefox 57.0.1 console)

It's confusing since prototype methods exist in Array.
Additionally, where does staic method(Array.from(), Array.isArray() etc) exists in?

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I think I've understood concepts of javascript prototype to some extent, so what I'm curious about is why prototype methods(concat() push() ...) apear both in Array and Array.prototype