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run code in 200+ php & hhvm versions
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<?php function breakPartitionsLongerThan ($partitions, $length) { $ret = array(); foreach ($partitions as $partition) { $chunks = array_chunk ($partition, $length); if (count($chunks) > 1) for ($i = 0; $i < count ($chunks) - 1; $i++) // for every chunk except the last one, append the first address of the next chunk. $chunks[$i][] = $chunks[$i+1][0]; $ret = array_merge ($ret, $chunks); } return $ret; }
Output for 4.3.0 - 7.2.0