Here's the test code: 
for (0..5) {
  print map("<@$_>", split_array_in_two(1..$_)), "\n";
}

[download]
Here's the output: 
<><>
<1><1>
<1><2>
<1><2 3>
<1 2><3 4>
<1 2><3 4 5>

[download]
One-element input is still duplicated. Don't use @_ as an index.
Caution: Contents may have been coded under pressure.

In reply to Re^5: split an array in two by Roy Johnson
in thread split an array in two by water

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