When testing the success of failure of an open command, is it better to use '||' or 'or': 
my $file = 'somefile.txt';
open (THEFILE, ">$file") ||
   die "Could not create $file - $!\n";

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vs 
my $file = 'somefile.txt';
open (THEFILE, ">$file") or
   die "Could not create $file - $!\n";

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What about '&&' vs 'and' when testing the success or failure when using system: 
my $command = "/bin/cp fileone filetwo";
system ($command) and
   die "Fooey, $command - $!\n";

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vs 
my $command = "/bin/cp fileone filetwo";
system ($command) &&
   die "Fooey, $command - $!\n";

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In reply to 'or' vs '', '&&' vs 'and' by Anonymous Monk

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