1 #!/bin/bash
2
3 ### Process sub input
4 f=_tmp/process-sub.txt
5 { echo 1; echo 2; echo 3; } > $f
6 comm <(head -n 2 $f) <(tail -n 2 $f)
7 # stdout-json: "1\n\t\t2\n\t3\n"