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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