Short and simple: 

perl -MSocket -E'say inet_ntoa "".gethostbyname shift' domain

[download]
Or even shorter: 
gethost domain

[download]
Or if you want one line of Perl as opposed to a one-liner, 
say gethost($host);

[download]

Writing program gethost and/or function gethost is left to you.

In reply to Re: gethostbyname one-liner: Improvements? by ikegami
in thread gethostbyname one-liner: Improvements? by cmv

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