1DBCOLCOPYLAST(1)      User Contributed Perl Documentation     DBCOLCOPYLAST(1)
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NAME

6       dbcolcopylast - create new columns that are copies of prior columns
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SYNOPSIS

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

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

17       -e EmptyValue or --empty
18           Specify the value newly created columns get.
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20       This module also supports the standard fsdb options:
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22       -d  Enable debugging output.
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24       -i or --input InputSource
25           Read from InputSource, typically a file name, or "-" for standard
26           input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
27           objects.
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29       -o or --output OutputDestination
30           Write to OutputDestination, typically a file name, or "-" for
31           standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
32           Fsdb::BoundedQueue objects.
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34       --autorun or --noautorun
35           By default, programs process automatically, but Fsdb::Filter
36           objects in Perl do not run until you invoke the run() method.  The
37           "--(no)autorun" option controls that behavior within Perl.
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39       --help
40           Show help.
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42       --man
43           Show full manual.
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SAMPLE USAGE

46   Input:
47           #fsdb test
48           a
49           b
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51   Command:
52           cat data.fsdb | dbcolcopylast foo
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54   Output:
55           #fsdb      test    foo
56           a       -
57           b       -
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SEE ALSO

60       Fsdb.
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63       Copyright (C) 1991-2022 by John Heidemann <johnh@isi.edu>
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65       This program is distributed under terms of the GNU general public
66       license, version 2.  See the file COPYING with the distribution for
67       details.
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71perl v5.34.1                      2022-04-04                  DBCOLCOPYLAST(1)
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