dbrowenumerate man page

dbrowenumerate — enumerate rows, starting from zero

Description

Add a new column “count”, incremented for each row of data, starting with zero. Use dbrowaccumulate for control over initial value or increment; this module is just a wrapper around that.

Options

-N or --new-name N
Name the new column N. Defaults to "count".

This module also supports the standard jdb options:

-d
Enable debugging output.
-i or --input InputSource
Read from InputSource, typically a file name, or "-" for standard input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.
-o or --output OutputDestination
Write to OutputDestination, typically a file name, or "-" for standard output, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue objects.
--autorun or --noautorun
By default, programs process automatically, but Fsdb::Filter objects in Perl do not run until you invoke the run() method. The "--(no)autorun" option controls that behavior within Perl.
--help
Show help.
--man
Show full manual.

Sample Usage

Input

#h account passwd uid gid fullname homedir shell
johnh * 2274 134 John_Heidemann /home/johnh /bin/bash
greg * 2275 134 Greg_Johnson /home/greg /bin/bash
root * 0 0 Root /root /bin/bash
# this is a simple database

Command

cat DATA/passwd.jdb | dbrowenumerate

Output

#h account passwd uid  gid fullname       homedir     shell     count 
johnh      *      2274 134 John_Heidemann /home/johnh /bin/bash 0     
greg       *      2275 134 Greg_Johnson   /home/greg  /bin/bash 1     
root       *      0    0   Root           /root       /bin/bash 2     
# this is a simple database
#  | /home/johnh/BIN/DB/dbrowenumerate

See Also

Fsdb, dbrowaccumulate.

Info

2016-01-04 perl v5.24.0 User Contributed Perl Documentation