My style is very different to each of the proposals: 
my %SEPARATOR_BY_OS = ( darwin  => ':',
                        MSWin32 => '\\' );

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

[download]

See Platforms in perlport for the possible values of $^O. Note that MACOS isn't part of any value and that your solution would return \ on Mac OS X, as 

index 'DARWIN', 'WIN' == 3

[download]

($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,

[download]

In reply to Re: What's your programming style? by choroba
in thread What's your programming style? by harangzsolt33

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