Perl Christmas Quiz 2009
Ruud H.G. van Tol
rvtol at isolution.nl
Tue Dec 1 07:44:59 GMT 2009
> On Mon, Nov 30, 2009 at 06:24:12PM +0000, Chris Jack wrote:
>> 7) Write a one line program that takes a non-negative integer as an argument
>> and prints the square root when the answer's an integer.
>> Restrictions: the perl line should be a regular expression.
> Just a regular expression? Regular expressions don't print, so that would
> be impossible.
Though perl can print itself:
echo 169 | perl -ple'$_="the square root"if/^\d+$/'
(this is not an answer)
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