http://www.perlmonks.org?node_id=83928


in reply to Closest-value-in-list Golf!

oops :
Warning: Use of "keys" without parens is ambiguous at C:\trash.pl line 8.
my answer is forthcoming, will update.
update you can shave off a few chars by changing
$h{shift@s}

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to 
$h{$s[0]}

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. Don't get too complex, eh? UpdateTime's up!
sub e {sub n{abs($s-$b)};$s=pop;while($b=pop){if(&n<$d||!$d){$l=$b;$d=
+&n}}$l}

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for a total of 70 chars.

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