Sorry but some syntaxic piece of code are really obscur. i am not as comfortable as you with perl. do you mind giving me a short explanation on the elements hereunder? 
sub perl_mouse {
    my %HoH = %{+shift}; # I know @_ to get the parameter but not this
+ one
}

$saw{lc,} # what is lc,?

grep { $count!=$count{$_} } map { ++$count{$_};$_ } map { keys %{$HoH{
+$_}} } keys %HoH 

# the result of this line is stored in which variable?

[download]
thanks

In reply to Re: Common elements of a hash of hashes by Anonymous Monk
in thread Common elements of a hash of hashes by Anonymous Monk

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