alias or function? and bash 'time'

In a previous post (and a follow-up), I wrote about a number of useful and time-saving aliases that I use in the bash shell. Those posts are pretty old now. In the meantime, I've defined another interesting alias. While nothing special in itself, I've discovered that this is one task that can be done better in another way.The new alias is this:pig='pkg_info | grep 'I've found it to be very useful