my %SEPARATOR_BY_OS = ( darwin  => ':',
                        MSWin32 => '\\' );

sub get_pathname_separator {
    $SEPARATOR_BY_OS{$^O} // '/'
}


##</code><code>##

index 'DARWIN', 'WIN' == 3


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,