'Watch' command as a bash function.

gistfile1.sh

# I miss 'watch' on OS X

watch () { 
clear
if [ -z $2 ]
then 
	time="5" # Saneish default
	watchedcmd=$1
else
	time=$(echo $1 | sed -e 's/-n//')
	watchedcmd=$2 
fi
while true; do echo "Watching ${watchedcmd} - refreshing every ${time} seconds" ; ${watchedcmd} ; sleep ${time} ;clear; done 

}