How to compare two arrays and pick only the non matching elements In postgres

Question

How can I pick only the non matching elements between two arrays.

Example:

base_array [12,3,5,7,8]
temp_array [3,7,8]

So here I wan

Answer 1

The contrib/intarray module provides this functionality--for arrays of integers, anyway. For other data types, you may have to write your own functions (or modify the ones provided with intarray).