Bash-loops

Interesting bash loop constructs I have found

cat interesting_loop.sh 
#!/bin/bash

_admin_ip="202.54.1.33|MUM_VPN_GATEWAY 23.1.2.3|DEL_VPN_GATEWAY 13.1.2.3|SG_VPN_GATEWAY"
for e in $_admin_ip
do
   echo  allow from "${e%%|*}" to any port 22 proto tcp comment "Open SSH port for ${e##*|}"
done
chubbard@chubbard-laptop:~$ ./interesting_loop.sh 
allow from 202.54.1.33 to any port 22 proto tcp comment Open SSH port for MUM_VPN_GATEWAY
allow from 23.1.2.3 to any port 22 proto tcp comment Open SSH port for DEL_VPN_GATEWAY
allow from 13.1.2.3 to any port 22 proto tcp comment Open SSH port for SG_VPN_GATEWAY
chubbard@chubbard-laptop:~$