gistfile1.txt

$ cat deslurm2.mlrsh
#!/usr/bin/env mlr -s

--csv
put '
  func deslurm(str s): num {
    # example "5-18:53:20"
    fields = unformat("{}-{}:{}:{}", s);
    days    = fields[1];
    hours   = fields[2];
    minutes = fields[3];
    seconds = fields[4];

    return seconds + minutes * 60 + hours * 3600 + days * 86400;
  }
  $y = deslurm($x);
  $z = sec2dhms($y);
'