What is a pseudo-array in javascript? How do I convert a pseudo-array into a standard array?

In JS, arrays are special objects, all objects have properties, arrays have, arrays represent collections of ordered data, and objects represent collections of unordered data.

What is the pseudo-array, of course, it is also an object, pseudo-arrays generally have the following characteristics:

• storing data by index;
• has the length property;
• No array of push, shift, pop, and other methods;

The arguments object of the function, as well as the NodeList object returned by getElementsByTagName, Ele.childnodes, or some custom object, can be pseudo-arrays.

We can convert a pseudo-array to a standard array in the following ways:

1, using Array.prototype.slice.call () or [].slice.call ();

Array.prototype.slice.call ({   0: "Hello",   1:12,   2:true,   Length:3  });   //

2, the use of ES6 Array.from method;

Array.from ({   0: "Hello",   1:12,   2:2013,   3: "University" ,   Length:4  });   // ["Hello", 12, 2013, "University"]  

What is a pseudo-array in javascript? How do I convert a pseudo-array into a standard array?