Isn't this what local is for? Something like the following;

my @array = 1..10;
{
  local @array = @array;
  while (my @chunk = splice @array, 0, 2) {
    print "Chunk: @chunk\n";
  }
}
print "Original array is still intact! (@array)\n";

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In reply to Re: Non-destructive array processing by Gilimanjaro
in thread Non-destructive array processing by Juerd

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