The constructor creates a new object and optionally initialises it with a set of handles. It is these values that will be returned when an event occurs. Remove all the given handles from the object. This method also works by the fileno of the handles.
Returns undef otherwise.
Return an array of handles that are ready for reading. The result will be an array of 3 elements, each a reference to an array which will hold the handles that are ready for reading, writing and have error conditions respectively. Upon error an empty array is returned. Currently maintained by the Perl Porters. All rights reserved.