I guess the situation that the first round of
an iteration provides information that is
valid for all rounds, while not available
before the iteration has started, is too
unlikely to call for a general pattern.
That said, a way to achieve the same result
with slightly prettier code alignment could be:
sub arrayref_to_csvline { ... }
my $rows = 0;
while (my $row = $iter->())
{
print arrayref_to_csvline($row->fields) unless $rows++;
print arrayref_to_csvline($row->values);
}
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