root@vm-test-001:~/mongosearch# part=( "${arr[@]:i:batchsize}" )
  root@vm-test-001:~/mongosearch# echo $part
  "C:00000092666270:53882159774"
  
  root@vm-test-001:~/mongosearch# perl -ni -e 'print; print "permissibleCars = [ \${part[*]} ]\n" if $. == 2' query/containerId_count.js