arrays - Explanation of [].slice.call in javascript? -

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I stumbled upon this clean shortcut to change a DOM nodelist in a regular array, but I have to accept, I do not fully understand how it works: 

  [] Slice.call (document.querySelectorAll ('a'), 0)

then it starts with an empty array [] , then slice is used to change the result of call for a new array?

Little does I understand that how does call change from document.querySelectorAll ('a') to a regular array?

What's happening here that you call slice () As it was the function of nodilist was the function of call () . In this case, what is the slice () , an empty array is created, then the object that is running on (basically an array, now a nodilist ) Repeat from and keep adding elements to the empty array of that object, which is finally returned, it is one.

Edit:

Then it starts with an empty array [], then the experiment to change the result of the slice Is a new array Yes?

This is not correct []. The function object returns a function object that contains a function call () which is the first parameter of call () to this The function specifying the call; In other words, the function thinks that this parameter is called from an array instead of ( NodeList by document.querySelectorAll ('a') ).


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