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# News
## 3.3.2 - 2024-12-21
### Fixes
* Fixed a parse bug with a quoted line with `col_sep` and an empty
line. This was introduced in 3.3.1.
* GH-324
* Reported by stoodfarback
### Thanks
* stoodfarback
## 3.3.1 - 2024-12-15
### Improvements
* `CSV.open`: Changed to detect BOM by default. Note that this isn't
enabled on Windows because Ruby may have a bug. See also:
https://bugs.ruby-lang.org/issues/20526
* GH-301
* Reported by Junichi Ito
* Improved performance.
* GH-311
* GH-312
* Patch by Vladimir Kochnev
* `CSV.open`: Added support for `StringIO` as an input.
* GH-300
* GH-302
* Patch by Marcelo
* Added a built-in time converter. You can use it by `converters:
:time`.
* GH-313
* Patch by Bart de Water
* Added `CSV::TSV` for tab-separated values.
* GH-272
* GH-319
* Reported by kojix2
* Patch by Jas
### Thanks
* Junichi Ito
* Vladimir Kochnev
* Marcelo
* Bart de Water
* kojix2
* Jas
## 3.3.0 - 2024-03-22
### Fixes
* Fixed a regression parse bug in 3.2.9 that parsing with
`:skip_lines` may cause wrong result.
## 3.2.9 - 2024-03-22
### Fixes
* Fixed a parse bug that wrong result may be happen when:
* `:skip_lines` is used
* `:row_separator` is `"\r\n"`
* There is a line that includes `\n` as a column value
Reported by Ryo Tsukamoto.
GH-296
### Thanks
* Ryo Tsukamoto
## 3.2.8 - 2023-11-08
### Improvements
* Added `CSV::InvalidEncodingError`.
Patch by Kosuke Shibata.
GH-287
### Thanks
* Kosuke Shibata
## 3.2.7 - 2023-06-26
### Improvements
* Removed an unused internal variable.
[GH-273](https://github.com/ruby/csv/issues/273)
[Patch by Mau Magnaguagno]
* Changed to use `https://` instead of `http://` in documents.
[GH-274](https://github.com/ruby/csv/issues/274)
[Patch by Vivek Bharath Akupatni]
* Added prefix to a helper module in test.
[GH-278](https://github.com/ruby/csv/issues/278)
[Patch by Luke Gruber]
* Added a documentation for `liberal_parsing: {backslash_quotes: true}`.
[GH-280](https://github.com/ruby/csv/issues/280)
[Patch by Mark Schneider]
### Fixes
* Fixed a wrong execution result in documents.
[GH-276](https://github.com/ruby/csv/issues/276)
[Patch by Yuki Tsujimoto]
* Fixed a bug that the same line is used multiple times.
[GH-279](https://github.com/ruby/csv/issues/279)
[Reported by Gabriel Nagy]
### Thanks
* Mau Magnaguagno
* Vivek Bharath Akupatni
* Yuki Tsujimoto
* Luke Gruber
* Mark Schneider
* Gabriel Nagy
## 3.2.6 - 2022-12-08
### Improvements
* `CSV#read` consumes the same lines with other methods like
`CSV#shift`.
[[GitHub#258](https://github.com/ruby/csv/issues/258)]
[Reported by Lhoussaine Ghallou]
* All `Enumerable` based methods consume the same lines with other
methods. This may have a performance penalty.
[[GitHub#260](https://github.com/ruby/csv/issues/260)]
[Reported by Lhoussaine Ghallou]
* Simplify some implementations.
[[GitHub#262](https://github.com/ruby/csv/pull/262)]
[[GitHub#263](https://github.com/ruby/csv/pull/263)]
[Patch by Mau Magnaguagno]
### Fixes
* Fixed `CSV.generate_lines` document.
[[GitHub#257](https://github.com/ruby/csv/pull/257)]
[Patch by Sampat Badhe]
### Thanks
* Sampat Badhe
* Lhoussaine Ghallou
* Mau Magnaguagno
## 3.2.5 - 2022-08-26
### Improvements
* Added `CSV.generate_lines`.
[[GitHub#255](https://github.com/ruby/csv/issues/255)]
[Reported by OKURA Masafumi]
[[GitHub#256](https://github.com/ruby/csv/pull/256)]
[Patch by Eriko Sugiyama]
### Thanks
* OKURA Masafumi
* Eriko Sugiyama
## 3.2.4 - 2022-08-22
### Improvements
* Cleaned up internal implementations.
[[GitHub#249](https://github.com/ruby/csv/pull/249)]
[[GitHub#250](https://github.com/ruby/csv/pull/250)]
[[GitHub#251](https://github.com/ruby/csv/pull/251)]
[Patch by Mau Magnaguagno]
* Added support for RFC 3339 style time.
[[GitHub#248](https://github.com/ruby/csv/pull/248)]
[Patch by Thierry Lambert]
* Added support for transcoding String CSV. Syntax is
`from-encoding:to-encoding`.
[[GitHub#254](https://github.com/ruby/csv/issues/254)]
[Reported by Richard Stueven]
* Added quoted information to `CSV::FieldInfo`.
[[GitHub#254](https://github.com/ruby/csv/pull/253)]
[Reported by Hirokazu SUZUKI]
### Fixes
* Fixed a link in documents.
[[GitHub#244](https://github.com/ruby/csv/pull/244)]
[Patch by Peter Zhu]
### Thanks
* Peter Zhu
* Mau Magnaguagno
* Thierry Lambert
* Richard Stueven
* Hirokazu SUZUKI
## 3.2.3 - 2022-04-09
### Improvements
* Added contents summary to `CSV::Table#inspect`.
[GitHub#229][Patch by Eriko Sugiyama]
[GitHub#235][Patch by Sampat Badhe]
* Suppressed `$INPUT_RECORD_SEPARATOR` deprecation warning by
`Warning.warn`.
[GitHub#233][Reported by Jean byroot Boussier]
* Improved error message for liberal parsing with quoted values.
[GitHub#231][Patch by Nikolay Rys]
* Fixed typos in documentation.
[GitHub#236][Patch by Sampat Badhe]
* Added `:max_field_size` option and deprecated `:field_size_limit` option.
[GitHub#238][Reported by Dan Buettner]
* Added `:symbol_raw` to built-in header converters.
[GitHub#237][Reported by taki]
[GitHub#239][Patch by Eriko Sugiyama]
### Fixes
* Fixed a bug that some texts may be dropped unexpectedly.
[Bug #18245][ruby-core:105587][Reported by Hassan Abdul Rehman]
* Fixed a bug that `:field_size_limit` doesn't work with not complex row.
[GitHub#238][Reported by Dan Buettner]
### Thanks
* Hassan Abdul Rehman
* Eriko Sugiyama
* Jean byroot Boussier
* Nikolay Rys
* Sampat Badhe
* Dan Buettner
* taki
## 3.2.2 - 2021-12-24
### Improvements
* Added a validation for invalid option combination.
[GitHub#225][Patch by adamroyjones]
* Improved documentation for developers.
[GitHub#227][Patch by Eriko Sugiyama]
### Fixes
* Fixed a bug that all of `ARGF` contents may not be consumed.
[GitHub#228][Reported by Rafael Navaza]
### Thanks
* adamroyjones
* Eriko Sugiyama
* Rafael Navaza
## 3.2.1 - 2021-10-23
### Improvements
* doc: Fixed wrong class name.
[GitHub#217][Patch by Vince]
* Changed to always use `"\n"` for the default row separator on Ruby
3.0 or later because `$INPUT_RECORD_SEPARATOR` was deprecated
since Ruby 3.0.
* Added support for Ractor.
[GitHub#218][Patch by rm155]
* Users who want to use the built-in converters in non-main
Ractors need to call `Ractor.make_shareable(CSV::Converters)`
and/or `Ractor.make_shareable(CSV::HeaderConverters)` before
creating non-main Ractors.
### Thanks
* Vince
* Joakim Antman
* rm155
## 3.2.0 - 2021-06-06
### Improvements
* `CSV.open`: Added support for `:newline` option.
[GitHub#198][Patch by Nobuyoshi Nakada]
* `CSV::Table#each`: Added support for column mode with duplicated
headers.
[GitHub#206][Reported by Yaroslav Berezovskiy]
* `Object#CSV`: Added support for Ruby 3.0.
* `CSV::Row`: Added support for pattern matching.
[GitHub#207][Patch by Kevin Newton]
### Fixes
* Fixed typos in documentation.
[GitHub#196][GitHub#205][Patch by Sampat Badhe]
### Thanks
* Sampat Badhe
* Nobuyoshi Nakada
* Yaroslav Berezovskiy
* Kevin Newton
## 3.1.9 - 2020-11-23
### Fixes
* Fixed a compatibility bug that the line to be processed by
`skip_lines:` has a row separator.
[GitHub#194][Reported by Josef Šimánek]
### Thanks
* Josef Šimánek
## 3.1.8 - 2020-11-18
### Improvements
* Improved documentation.
[Patch by Burdette Lamar]
### Thanks
* Burdette Lamar
## 3.1.7 - 2020-08-04
### Improvements
* Improved document.
[GitHub#158][GitHub#160][GitHub#161]
[Patch by Burdette Lamar]
* Updated required Ruby version to 2.5.0 or later.
[GitHub#159]
[Patch by Gabriel Nagy]
* Removed stringio 0.1.3 or later dependency.
### Thanks
* Burdette Lamar
* Gabriel Nagy
## 3.1.6 - 2020-07-20
### Improvements
* Improved document.
[GitHub#127][GitHub#135][GitHub#136][GitHub#137][GitHub#139][GitHub#140]
[GitHub#141][GitHub#142][GitHub#143][GitHub#145][GitHub#146][GitHub#148]
[GitHub#148][GitHub#151][GitHub#152][GitHub#154][GitHub#155][GitHub#157]
[Patch by Burdette Lamar]
* `CSV.open`: Added support for `undef: :replace`.
[GitHub#129][Patch by Koichi ITO]
* `CSV.open`: Added support for `invalid: :replace`.
[GitHub#129][Patch by Koichi ITO]
* Don't run quotable check for invalid encoding field values.
[GitHub#131][Patch by Koichi ITO]
* Added support for specifying the target indexes and names to
`force_quotes:`.
[GitHub#153][Reported by Aleksandr]
* `CSV.generate`: Changed to use the encoding of the first non-ASCII
field rather than the encoding of ASCII only field.
* Changed to require the stringio gem 0.1.3 or later.
### Thanks
* Burdette Lamar
* Koichi ITO
* Aleksandr
## 3.1.5 - 2020-05-18
### Improvements
* Improved document.
[GitHub#124][Patch by Burdette Lamar]
### Fixes
* Added missing document files.
[GitHub#125][Reported by joast]
### Thanks
* Burdette Lamar
* joast
## 3.1.4 - 2020-05-17
### Improvements
* Improved document.
[GitHub#122][Patch by Burdette Lamar]
* Stopped to dropping stack trace for exception caused by
`CSV.parse_line`.
[GitHub#120][Reported by Kyle d'Oliveira]
### Fixes
* Fixed a bug that `:write_nil_value` or `:write_empty_value` don't
work with non `String` objects.
[GitHub#123][Reported by asm256]
### Thanks
* Burdette Lamar
* asm256
* Kyle d'Oliveira
## 3.1.3 - 2020-05-09
### Improvements
* `CSV::Row#dup`: Copied deeply.
[GitHub#108][Patch by Jim Kane]
### Fixes
* Fixed a infinite loop bug for zero length match `skip_lines`.
[GitHub#110][Patch by Mike MacDonald]
* `CSV.generate`: Fixed a bug that encoding isn't set correctly.
[GitHub#110][Patch by Seiei Miyagi]
* Fixed document for the `:strip` option.
[GitHub#114][Patch by TOMITA Masahiro]
* Fixed a parse bug when split charcter exists in middle of column
value.
[GitHub#115][Reported by TOMITA Masahiro]
### Thanks
* Jim Kane
* Mike MacDonald
* Seiei Miyagi
* TOMITA Masahiro
## 3.1.2 - 2019-10-12
### Improvements
* Added `:col_sep` check.
[GitHub#94][Reported by Florent Beaurain]
* Suppressed warnings.
[GitHub#96][Patch by Nobuyoshi Nakada]
* Improved documentation.
[GitHub#101][GitHub#102][Patch by Vitor Oliveira]
### Fixes
* Fixed a typo in documentation.
[GitHub#95][Patch by Yuji Yaginuma]
* Fixed a multibyte character handling bug.
[GitHub#97][Patch by koshigoe]
* Fixed typos in documentation.
[GitHub#100][Patch by Vitor Oliveira]
* Fixed a bug that seeked `StringIO` isn't accepted.
[GitHub#98][Patch by MATSUMOTO Katsuyoshi]
* Fixed a bug that `CSV.generate_line` doesn't work with
`Encoding.default_internal`.
[GitHub#105][Reported by David Rodríguez]
### Thanks
* Florent Beaurain
* Yuji Yaginuma
* Nobuyoshi Nakada
* koshigoe
* Vitor Oliveira
* MATSUMOTO Katsuyoshi
* David Rodríguez
## 3.1.1 - 2019-04-26
### Improvements
* Added documentation for `strip` option.
[GitHub#88][Patch by hayashiyoshino]
* Added documentation for `write_converters`, `write_nil_value` and
`write_empty_value` options.
[GitHub#87][Patch by Masafumi Koba]
* Added documentation for `quote_empty` option.
[GitHub#89][Patch by kawa\_tech]
### Fixes
* Fixed a bug that `strip; true` removes a newline.
### Thanks
* hayashiyoshino
* Masafumi Koba
* kawa\_tech
## 3.1.0 - 2019-04-17
### Fixes
* Fixed a backward incompatibility bug that `CSV#eof?` may raises an
error.
[GitHub#86][Reported by krororo]
### Thanks
* krororo
## 3.0.9 - 2019-04-15
### Fixes
* Fixed a test for Windows.
## 3.0.8 - 2019-04-11
### Fixes
* Fixed a bug that `strip: String` doesn't work.
## 3.0.7 - 2019-04-08
### Improvements
* Improve parse performance 1.5x by introducing loose parser.
### Fixes
* Fix performance regression in 3.0.5.
* Fix a bug that `CSV#line` returns wrong value when you
use `quote_char: nil`.
## 3.0.6 - 2019-03-30
### Improvements
* `CSV.foreach`: Added support for `mode`.
## 3.0.5 - 2019-03-24
### Improvements
* Added `:liberal_parsing => {backslash_quote: true}` option.
[GitHub#74][Patch by 284km]
* Added `:write_converters` option.
[GitHub#73][Patch by Danillo Souza]
* Added `:write_nil_value` option.
* Added `:write_empty_value` option.
* Improved invalid byte line number detection.
[GitHub#78][Patch by Alyssa Ross]
* Added `quote_char: nil` optimization.
[GitHub#79][Patch by 284km]
* Improved error message.
[GitHub#81][Patch by Andrés Torres]
* Improved IO-like implementation for `StringIO` data.
[GitHub#80][Patch by Genadi Samokovarov]
* Added `:strip` option.
[GitHub#58]
### Fixes
* Fixed a compatibility bug that `CSV#each` doesn't care `CSV#shift`.
[GitHub#76][Patch by Alyssa Ross]
* Fixed a compatibility bug that `CSV#eof?` doesn't care `CSV#each`
and `CSV#shift`.
[GitHub#77][Reported by Chi Leung]
* Fixed a compatibility bug that invalid line isn't ignored.
[GitHub#82][Reported by krororo]
* Fixed a bug that `:skip_lines` doesn't work with multibyte characters data.
[GitHub#83][Reported by ff2248]
### Thanks
* Alyssa Ross
* 284km
* Chi Leung
* Danillo Souza
* Andrés Torres
* Genadi Samokovarov
* krororo
* ff2248
## 3.0.4 - 2019-01-25
### Improvements
* Removed duplicated `CSV::Row#include?` implementations.
[GitHub#69][Patch by Max Schwenk]
* Removed duplicated `CSV::Row#header?` implementations.
[GitHub#70][Patch by Max Schwenk]
### Fixes
* Fixed a typo in document.
[GitHub#72][Patch by Artur Beljajev]
* Fixed a compatibility bug when row headers are changed.
[GitHub#71][Reported by tomoyuki kosaka]
### Thanks
* Max Schwenk
* Artur Beljajev
* tomoyuki kosaka
## 3.0.3 - 2019-01-12
### Improvements
* Migrated benchmark tool to benchmark-driver from benchmark-ips.
[GitHub#57][Patch by 284km]
* Added `liberal_parsing: {double_quote_outside_quote: true}` parse
option.
[GitHub#66][Reported by Watson]
* Added `quote_empty:` write option.
[GitHub#35][Reported by Dave Myron]
### Fixes
* Fixed a compatibility bug that `CSV.generate` always return
`ASCII-8BIT` encoding string.
[GitHub#63][Patch by Watson]
* Fixed a compatibility bug that `CSV.parse("", headers: true)`
doesn't return `CSV::Table`.
[GitHub#64][Reported by Watson][Patch by 284km]
* Fixed a compatibility bug that multiple-characters column
separator doesn't work.
[GitHub#67][Reported by Jesse Reiss]
* Fixed a compatibility bug that double `#each` parse twice.
[GitHub#68][Reported by Max Schwenk]
### Thanks
* Watson
* 284km
* Jesse Reiss
* Dave Myron
* Max Schwenk
## 3.0.2 - 2018-12-23
### Improvements
* Changed to use strscan in parser.
[GitHub#52][Patch by 284km]
* Improves CSV write performance.
3.0.2 will be about 2 times faster than 3.0.1.
* Improves CSV parse performance for complex case.
3.0.2 will be about 2 times faster than 3.0.1.
### Fixes
* Fixed a parse error bug for new line only input with `headers` option.
[GitHub#53][Reported by Chris Beer]
* Fixed some typos in document.
[GitHub#54][Patch by Victor Shepelev]
### Thanks
* 284km
* Chris Beer
* Victor Shepelev
## 3.0.1 - 2018-12-07
### Improvements
* Added a test.
[GitHub#38][Patch by 284km]
* `CSV::Row#dup`: Changed to duplicate internal data.
[GitHub#39][Reported by André Guimarães Sakata]
* Documented `:nil_value` and `:empty_value` options.
[GitHub#41][Patch by OwlWorks]
* Added support for separator detection for non-seekable inputs.
[GitHub#45][Patch by Ilmari Karonen]
* Removed needless code.
[GitHub#48][Patch by Espartaco Palma]
* Added support for parsing header only CSV with `headers: true`.
[GitHub#47][Patch by Kazuma Shibasaka]
* Added support for coverage report in CI.
[GitHub#48][Patch by Espartaco Palma]
* Improved auto CR row separator detection.
[GitHub#51][Reported by Yuki Kurihara]
### Fixes
* Fixed a typo in document.
[GitHub#40][Patch by Marcus Stollsteimer]
### Thanks
* 284km
* André Guimarães Sakata
* Marcus Stollsteimer
* OwlWorks
* Ilmari Karonen
* Espartaco Palma
* Kazuma Shibasaka
* Yuki Kurihara
## 3.0.0 - 2018-06-06
### Fixes
* Fixed a bug that header isn't returned for empty row.
[GitHub#37][Patch by Grace Lee]
### Thanks
* Grace Lee
## 1.0.2 - 2018-05-03
### Improvements
* Split file for CSV::VERSION
* Code cleanup: Split csv.rb into a more manageable structure
[GitHub#19][Patch by Espartaco Palma]
[GitHub#20][Patch by Steven Daniels]
* Use CSV::MalformedCSVError for invalid encoding line
[GitHub#26][Reported by deepj]
* Support implicit Row <-> Array conversion
[Bug #10013][ruby-core:63582][Reported by Dawid Janczak]
* Update class docs
[GitHub#32][Patch by zverok]
* Add `Row#each_pair`
[GitHub#33][Patch by zverok]
* Improve CSV performance
[GitHub#30][Patch by Watson]
* Add :nil_value and :empty_value option
### Fixes
* Fix a bug that "bom|utf-8" doesn't work
[GitHub#23][Reported by Pavel Lobashov]
* `CSV::Row#to_h`, `#to_hash`: uses the same value as `Row#[]`
[Bug #14482][Reported by tomoya ishida]
* Make row separator detection more robust
[GitHub#25][Reported by deepj]
* Fix a bug that too much separator when col_sep is `" "`
[Bug #8784][ruby-core:63582][Reported by Sylvain Laperche]
### Thanks
* Espartaco Palma
* Steven Daniels
* deepj
* Dawid Janczak
* zverok
* Watson
* Pavel Lobashov
* tomoya ishida
* Sylvain Laperche
* Ryunosuke Sato
## 1.0.1 - 2018-02-09
### Improvements
* `CSV::Table#delete`: Added bulk delete support. You can delete
multiple rows and columns at once.
[GitHub#4][Patch by Vladislav]
* Updated Gem description.
[GitHub#11][Patch by Marcus Stollsteimer]
* Code cleanup.
[GitHub#12][Patch by Marcus Stollsteimer]
[GitHub#14][Patch by Steven Daniels]
[GitHub#18][Patch by takkanm]
* `CSV::Table#dig`: Added.
[GitHub#15][Patch by Tomohiro Ogoke]
* `CSV::Row#dig`: Added.
[GitHub#15][Patch by Tomohiro Ogoke]
* Added ISO 8601 support to date time converter.
[GitHub#16]
### Fixes
* Fixed wrong `CSV::VERSION`.
[GitHub#10][Reported by Marcus Stollsteimer]
* `CSV.generate`: Fixed a regression bug that `String` argument is
ignored.
[GitHub#13][Patch by pavel]
### Thanks
* Vladislav
* Marcus Stollsteimer
* Steven Daniels
* takkanm
* Tomohiro Ogoke
* pavel