Pass stdin into Unix host or dig command

Question

Let\'s say I have a list of IPs coming into a log that I\'m tailing:

1.1.1.1
1.1.1.2
1.1.1.3 

I\'d like to easily resolve them to host names. I

Answer 1

In bash You can do:

stdout | (dig -f <(cat))

Example program:

(
cat <

This way You only invoke 'dig' once.