dateseq - Generate a sequence of dates
This document describes version 0.112 of dateseq (from Perl distribution App-dateseq), released on 2022-10-12.
dateseq [--business|--no-business|--nobusiness] [--business6|--no-business6|--nobusiness6] [--eval=str|-e=str] [(--exclude-dow=date::dow_nums)+|--exclude-dow-json=json] [(--exclude-month=date::month_nums)+|--exclude-month-json=json] [--format-class-attrs=s|--format-class-attrs-json=json] [--format-class=perl::modname] [--format=name|--json] [--header=str] [(--include-dow=date::dow_nums)+|--include-dow-json=json] [(--include-month=date::month_nums)+|--include-month-json=json] [--limit-monthly=posint] [--limit-yearly=posint] [--limit=posint|-n=posint] [--(no)naked-res] [--page-result[=program]|--view-result[=program]] [--random] [--reverse|-r] [--strftime=str|-f=str] -- [from] [to] [increment]
See examples in the "EXAMPLES" section.
This utility is similar to Unix seq command, except that it generates a sequence of dates.
* marks required options.
*
Starting date.
Can also be specified as the 1st command-line argument.
Add a header row.
Can also be specified as the 3rd command-line argument.
Only output at most this number of dates for each month.
Only output at most this number of dates for each year.
Only generate a certain amount of dates.
Instead of incrementing/decrementing monotonically, generate random date between --to and --from.
If you specify this, you have to specify --to and --from.
--to
--from
Also, currently, if you also specify --limit-yearly or --limit-monthly, the script may hang because it runs out of dates, so be careful when specifying these options combined.
--limit-yearly
--limit-monthly
Decrement instead of increment.
End date, if not specified will generate an infinite* stream of dates.
Can also be specified as the 2nd command-line argument.
Only list business days (Mon-Fri), or non-business days.
Only list business days (Mon-Sat), or non-business days.
Do not show dates with these day-of-weeks (JSON-encoded).
See --exclude-dow.
--exclude-dow
Do not show dates with these day-of-weeks.
Can be specified multiple times.
Do not show dates with these month numbers (JSON-encoded).
See --exclude-month.
--exclude-month
Do not show dates with these month numbers.
Only show dates with these day-of-weeks (JSON-encoded).
See --include-dow.
--include-dow
Only show dates with these day-of-weeks.
Only show dates with these month numbers (JSON-encoded).
See --include-month.
--include-month
Only show dates with these month numbers.
Arguments to pass to constructor of DateTime::Format::* class (JSON-encoded).
See --format-class-attrs.
--format-class-attrs
Arguments to pass to constructor of DateTime::Format::* class.
Use a DateTime::Format::* class for formatting.
By default, DateTime::Format::Strptime is used with pattern set from the <strftime> option.
strftime() format for each date.
Default is %Y-%m-%d, unless when hour/minute/second is specified, then it is %Y-%m-%dT%H:%M:%S.
%Y-%m-%d
%Y-%m-%dT%H:%M:%S
dateseq actually uses DateTimeX::strftimeq, so you can embed Perl code for flexibility. For example:
dateseq
% dateseq 2019-11-19 2019-11-25 -f '%Y-%m-%d%( $_->day_of_week == 7 ? "su" : "" )q'
will print something like:
2019-11-19 2019-11-20 2019-11-21 2019-11-22 2019-11-23 2019-11-24su 2019-11-25
Run perl code for each date.
Specified perl code will receive the date as DateTime object in $_and expected to return result to print.
$_
Choose output format, e.g. json, text.
Default value:
undef
Output can be displayed in multiple formats, and a suitable default format is chosen depending on the application and/or whether output destination is interactive terminal (i.e. whether output is piped). This option specifically chooses an output format.
Set output format to json.
When outputing as JSON, strip result envelope.
0
By default, when outputing as JSON, the full enveloped result is returned, e.g.:
[200,"OK",[1,2,3],{"func.extra"=>4}]
The reason is so you can get the status (1st element), status message (2nd element) as well as result metadata/extra result (4th element) instead of just the result (3rd element). However, sometimes you want just the result, e.g. when you want to pipe the result for more post-processing. In this case you can use --naked-res so you just get:
--naked-res
[1,2,3]
Filter output through a pager.
This option will pipe the output to a specified pager program. If pager program is not specified, a suitable default e.g. less is chosen.
less
View output using a viewer.
This option will first save the output to a temporary file, then open a viewer program to view the temporary file. If a viewer program is not chosen, a suitable default, e.g. the browser, is chosen.
Display help message and exit.
Display program's version and exit.
This script has shell tab completion capability with support for several shells.
To activate bash completion for this script, put:
complete -C dateseq dateseq
in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.
To activate tcsh completion for this script, put:
complete dateseq 'p/*/`dateseq`/'
in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is also recommended to install shcompgen (see above).
For fish and zsh, install shcompgen as described above.
% dateseq
% dateseq 2015-01-01 2015-01-31 2015-01-01 2015-01-02 ... 27 more lines ... 2015-01-30 2015-01-31
% dateseq yesterday "2 weeks from now" 2022-10-11T00:00:00 2022-10-12T00:00:00 ... 12 more lines ... 2022-10-25T00:00:00 2022-10-26T00:00:00
% dateseq 2015-01-31 2015-01-01 -r 2015-01-31 2015-01-30 ... 27 more lines ... 2015-01-02 2015-01-01
% dateseq 2015-01-01 -r
% dateseq 2015-01-01 -n 10 2015-01-01 2015-01-02 ... 6 more lines ... 2015-01-09 2015-01-10
% dateseq 2015-01-01 2015-01-31 -i P3D 2015-01-01 2015-01-04 ... 7 more lines ... 2015-01-28 2015-01-31
% dateseq 2015-01-01 --business -n 20 -f "%Y-%m-%d(%a)" 2015-01-01(Thu) 2015-01-02(Fri) 2015-01-05(Mon) 2015-01-06(Tue) 2015-01-07(Wed) ... 11 more lines ... 2015-01-23(Fri) 2015-01-26(Mon) 2015-01-27(Tue) 2015-01-28(Wed)
% dateseq 2015-01-01 --no-business -n 5 2015-01-03 2015-01-04 2015-01-10 2015-01-11 2015-01-17
% dateseq 2021-01-01 2021-12-13 --business --limit-monthly 1 -f "%Y-%m-%d(%a)" 2021-01-01(Fri) 2021-02-01(Mon) 2021-03-01(Mon) 2021-04-01(Thu) 2021-05-03(Mon) ... 3 more lines ... 2021-09-01(Wed) 2021-10-01(Fri) 2021-11-01(Mon) 2021-12-01(Wed)
% dateseq 2021-12-31 2021-01-01 -r --business --limit-monthly 1 -f "%Y-%m-%d(%a)" 2021-12-31(Fri) 2021-11-30(Tue) 2021-10-29(Fri) 2021-09-30(Thu) 2021-08-31(Tue) ... 3 more lines ... 2021-04-30(Fri) 2021-03-31(Wed) 2021-02-26(Fri) 2021-01-29(Fri)
% dateseq 2015-01-01 2015-02-28 --include-dow Mo,We,Fr -f "%Y-%m-%d(%a)"
% dateseq 2015-01-01 2015-02-28 --exclude-dow Mo -f "%Y-%m-%d(%a)"
% dateseq 2010-01-01 2015-01-31 -f "%Y,%m,%d" --header "year,month,day" year,month,day 2010,01,01 ... 1854 more lines ... 2015,01,30 2015,01,31
% dateseq 2010-01-01 2015-12-31 -i P1M -f "%Y-%m" 2010-01 2010-02 ... 68 more lines ... 2015-11 2015-12
% setop --diff <(dateseq 2015-01-01 2015-12-31) <(list-idn-holidays --year 2015) 2015-01-02 2015-01-04 2015-01-05 2015-01-06 2015-01-07 ... 336 more lines ... 2015-12-28 2015-12-29 2015-12-30 2015-12-31
See also dateseq-idn as alternative.
% setop --diff <(dateseq 2015-01-01 2015-12-31 --business) <(list-idn-holidays --year 2015) 2015-01-02 2015-01-05 2015-01-06 2015-01-07 2015-01-08 ... 236 more lines ... 2015-12-28 2015-12-29 2015-12-30 2015-12-31
% dateseq 2010-01-01 2015-12-01 -f "%Y,%m" -i P1M --header "year,month" | fsql --add-csv - --add-csv data.csv -F YEAR -F MONTH 'SELECT year, month, data1 FROM stdin WHERE YEAR(data.date)=year AND MONTH(data.date)=month'
% dateseq 2020-12-24 2021-01-15 -f '%Y-%m-%d%( $_->day_of_week == 7 ? "su" : "" )q' 2020-12-24 2020-12-25 2020-12-26 2020-12-27su 2020-12-28 ... 14 more lines ... 2021-01-12 2021-01-13 2021-01-14 2021-01-15
% dateseq 2021-01-01 2021-12-01 --increment '1 month' -e 'my $dt2 = $_->clone; $dt2->add(months=>1); $dt2->add(days => -1); $_->ymd . " " . $dt2->ymd' 2021-01-01 2021-01-31 2021-02-01 2021-02-28 2021-03-01 2021-03-31 2021-04-01 2021-04-30 2021-05-01 2021-05-31 ... 3 more lines ... 2021-09-01 2021-09-30 2021-10-01 2021-10-31 2021-11-01 2021-11-30 2021-12-01 2021-12-31
% dateseq 2020-01-01 2020-12-01 --increment '1 month' -e 'my $dt2 = $_->clone; $dt2->add(months=>1); $dt2->add(days => -1); sprintf "list-metacpan-releases --from-date %sT00:00:00 --to-date %sT23:59:59 --json > %04d%02d.json", $_->ymd, $dt2->ymd, $_->year, $_->month' | bash
% dateseq --random --from "1 year ago" --to "1 year from now" --limit 100 2022-09-08T14:55:06 2022-03-20T12:07:01 ... 96 more lines ... 2022-01-02T07:23:33 2022-12-31T03:43:00
Please visit the project's homepage at https://metacpan.org/release/App-dateseq.
Source repository is at https://github.com/perlancar/perl-App-dateseq.
durseq. Produce sequence of date durations.
dateseq-idn. A wrapper for dateseq, with built-in support for Indonesian holidays.
seq.
seq-pl. Perl variant of seq.
perlancar <perlancar@cpan.org>
To contribute, you can send patches by email/via RT, or send pull requests on GitHub.
Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:
% prove -l
If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.
This software is copyright (c) 2022, 2021, 2020, 2019, 2016, 2015 by perlancar <perlancar@cpan.org>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-dateseq
When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.
To install App::dateseq, copy and paste the appropriate command in to your terminal.
cpanm
cpanm App::dateseq
CPAN shell
perl -MCPAN -e shell install App::dateseq
For more information on module installation, please visit the detailed CPAN module installation guide.