Perhaps some kind of two item queue.

my @queue;

# prime @queue with first line of data
push @queue, scalar <DATA>;

while (<DATA>) {
  push @queue, $_;

  if (/your condition/) {
    # edit line in $queue[0]
  }

  print shift @queue;
}

# print remaining queue
print @queue;

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In reply to Re: edit text by davorg
in thread edit text by polr

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