public function count($inFile, $outFile)
{
$reader = new LineReader($inFile);
$writer = new BufferedFileWriter($outFile);
$prev = $reader->current();
$n = 1;
$reader->next();
while ($reader->valid()) {
if (strcmp($reader->current(), $prev) == 0) {
$n++;
} else {
$writer->write($prev . ' ' . $n . "\n");
$prev = $reader->current();
$n = 1;
}
$reader->next();
}
$writer->close();
}
private function copyChunk($file1, $outFile)
{
$chunk1 = new LineReader($file1);
$out = new BufferedFileWriter($outFile);
while ($chunk1->valid()) {
$out->write($chunk1->current() . "\n");
$chunk1->next();
}
$chunk1->close();
unlink($file1);
$out->close();
}