Fsdb::F...copylast(3)

okay bestie, welcome to the Fsdb::F...copylast(3) page from the User Contributed Perl Documentation 💅 this is the one for dbcolcopylast, and it's lowkey iconic.

✨ NAME ✨

dbcolcopylast — create new columns that are copies of prior columns 🫶

🦋 SYNOPSIS 🦋

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

💖 DESCRIPTION 💖

for each COLUMN, you get a brand-new column called copylast_COLUMN ✨ and that new column is the last value for that column — like, the value of that column from the row before. periodt. 💅

🎀 OPTIONS 🎀

• -e EmptyValue or --empty — specify the value that the newly created columns get 🎁

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 📖

🌸 SAMPLE USAGE 🌸

Input:

#fsdb test
a
b

Command:

cat data.fsdb | dbcolcopylast foo

Output:

#fsdb      test    foo
a       -
b       -

🔥 SEE ALSO 🔥

Fsdb. 👀

👑 CLASS FUNCTIONS 👑

new

$filter = new Fsdb::Filter::dbcolcopylast(@arguments);

create a new dbcolcopylast object, taking command-line arguments 🛠️

set_defaults

$filter->set_defaults();

internal: set up defaults 🧸

parse_options

$filter->parse_options(@ARGV);

internal: parse command-line arguments 🧠

setup

$filter->setup();

internal: setup, parse headers 📋

run

$filter->run();

internal: run over each rows 🏃‍♀️

🌈 AUTHOR and COPYRIGHT 🌈

Copyright (C) 1991-2022 by John Heidemann <johnh@isi.edu>

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

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okay that's the whole vibe, bestie 💖 this page is from perl v5.32.1, dated 2024-08-02, and it's the Fsdb::F...copylast(3) manual — mwah 😘✨