Object.getOwnPropertyNames() vs Object.keys()

#Differences

1. `Object.getOwnPropertyNames(obj)` returns all the properties of the object `obj`. `Object.keys(obj)` returns all enumerable properties.
   They provide the same result unless you set `enumerable: false` to any property.
   In the following example, the `screen` object has two properties, `branch` and `size`.
   const screen = {
       branch: 'Dell',
       size: '27inch',
   };
   
   Object.getOwnPropertyNames(screen); // ['branch', 'size']
   Object.keys(screen); // ['branch', 'size']

   Let's define one more property named `resolution` but it is set as `enumerable: false`:
   Object.defineProperties(screen, {
       resolution: {
           enumerable: false,
           value: '2560 x 1440',
       },
   });

   The `resolution` property then doesn't appear in the list of `Object.keys`:
   Object.getOwnPropertyNames(screen); // ['branch', 'size', 'resolution']
   Object.keys(screen); // ['branch', 'size']

2. For arrays, `Object.getOwnPropertyNames` includes an extra property named `length` which is the size of the array.
   const animals = ['dog', 'cat', 'tiger'];
   
   Object.keys(animals); // ['0', '1', '2']
   Object.getOwnPropertyNames(animals); // ['0', '1', '2', 'length']