dbcolcopylast - Man Page

create new columns that are copies of prior columns

Synopsis

    dbcolcopylast [-e EMPTY] [column...]

For each COLUMN, create a new column copylast_COLUMN that is the last value for that column---that is, the value of that column from the row before.

This module also supports the standard fsdb 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.

    #fsdb test
    a
    b

    cat data.fsdb | dbcolcopylast foo

    #fsdb      test    foo
    a       -
    b       -

This program is distributed under terms of the GNU general public license, version 2. See the file COPYING with the distribution for details.

2024-08-02 perl v5.40.0 User Contributed Perl Documentation