Abigail wrote:
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) -- Ruud
