(exists $distinct{$v}) ? $overflow{$k} = $v
                          : $distinct{$v} = $k;

##</code><code>##

  (  (exists $distinct{$v}) ? $overflow{$k} = $v
                            : $distinct{$v}  )
  = $k;

##</code><code>##

  (exists $distinct{$v}) ? $overflow{$k} = $v = $k
                         : $distinct{$v} = $k

##</code><code>##

if( $distinct{$v} ) { $overflow{$k}= $v }
               else { $distinct{$v}= $k }