Comment by scj

I've always wondered about expanding stdin, stdout, stderr. Say, stdjson that doesn't get visually displayed, but can be piped (and would only be generated if it is needed on the pipe stream).

ls | cat </dev/stdjson | string_proc_the_json_for_some_reason

With the direct ability to process in line:

ls -a | json.files[0].last_modified

I'd probably want multiple output formats (including s-expressions).