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. Objects: the object reference is copied into the new array.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. The newly constructed array is then populated with elements. They do so by first accessing nstructor to determine the constructor to use for the new array. 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.
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