Alternative non-destructive approach: 

my $vidis_ = sub { \@_ }->(@vidis);
while (my @section = splice @$vidis_, 0, 50) {
   ...
}

[download]

None of the elements are copied, so this is quite efficient.

In reply to Re^2: Next 50 array elements during each loop? by ikegami
in thread Next 50 array elements during each loop? by Bman70

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