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Interesting puzzle, and I'm not sure how you work japhy's solution, though it does seem interesting.

Here's my take, which ended up being a variation on Sprad's even though it started out differently:
sub p { # 68 characters my@s;for(@_){@s=(/^\D$/?(eval"$s[1]$_$s[0]",@s[2..$#s]):($_,@s))};@s } print p(@ARGV);

In reply to Re: Golf: RPN calculator by tadman
in thread Golf: RPN calculator by Sprad

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