Hi Motoi,

Thanks much for the help.

> Load zsh/parameter module,
>
> % zmodload -i zsh/parameter
>
> and,
>
> % users=( $userdirs[(I)*] )

This works nicely.

>> hosts=( ${$( cat /etc/hosts | cut -d : -f 1,7 | grep -v "#" )//:*/} )
>>
>> to get what I need.
>>
> This has the same problem, but I don't know a better way well.  
> Using some functions from Perl or some other language?

Do you mean that the commands inside the parameter expansion may work  
on Mac OS X but not on other computers?