selecting a subset of an array

[Wataru Kagawa <wkagawa@xxxxxxxxxxxxxxxxxxxx>]

Sorry for another basic question, but how do I exclude a particular  
element from an array by using its name in a parameter expansion?   
For example, I would like to select everything except for  
'foo1:output file' from the following array, using only 'foo1' in the  
expansion.
_list=( 'foo1:output file' 'foo2:input file' 'foo3:output figs'  
'foo4:input figs' )
Help is much appreciated.


Wataru Kagawa