:-----Original Message-----
:From: Shannon Fang [mailto:xrfang / hotmail.com]
:I am thinking of using the & operator of array, but it gives the common
:part of 2 sets, how can we find out the difference part? Is there a
:simpler way to acomplish this simple task?
:

For difference, use the - operator. eg:
obj.methods - Object.methods

David