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  1. or download this
    my $searchfor = $#ARGV ? join(' ',@ARGV) : die("I need a process to lo
    +ok for.");
    
  2. or download this
    my $searchfor = $#ARGV >= 0 ? join(' ',@ARGV) : die("I need a process 
    +to look for.");
    
  3. or download this
    my $searchfor = @ARGV ? join(' ',@ARGV) : die("I need a process to loo
    +k for.");
    
  4. or download this
    @ARGV or die("I need a process to look for.");
    my $searchfor = join(' ',@ARGV);