The following methods create new arrays by accessing nstructor to determine the constructor to use: Other methods mutate the array that the method was called on, in which case their return value differs depending on the method: sometimes a reference to the same array, sometimes the length of the new array. That is, if a referenced object is modified, the changes are visible to both the new and original arrays. Both the original and new array refer to the same object. Elements of the original array(s) are copied into the new array as follows: The copy always happens shallowly - the method never copies anything beyond the initially created array. They do so by first constructing a new array and then populating it with elements. Some methods do not mutate the existing array that the method was called on, but instead return a new array.
Object.prototype._lookupSetter_() Deprecated.Object.prototype._lookupGetter_() Deprecated.Object.prototype._defineSetter_() Deprecated.Object.prototype._defineGetter_() Deprecated.
