My way with Ruby

Kouhei Sutou

2018-06-01

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Acknowledgment
感謝
@drbrain
Eric Hodel
He fixed English in this slide
英語をチェックしてくれたよ！ありがとう！
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Keynote-ish topic
キーノートっぽい話題
Did you think
about it?
考えたことある？
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Keynote-ish topic1
キーノートっぽい話題1
Future
未来のこと
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Keynote-ish topic2
キーノートっぽい話題2
Focus on
one thing
deeply
なにかを深掘り
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Keynote-ish topic3
キーノートっぽい話題3
Overview
俯瞰した話
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My activities
as a Rubyist
私のRubyist活動
✓ Increase what Ruby can do
with free software
フリーソフトウェアを使ってRubyでできることを増やす
✓ Maintain libraries
ライブラリーのメンテナンス
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# of libraries maintained
メンテナンスしているライブラリー数
About 130
130くらい
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Today's topic
今日の話題
Overview
what we can do
with Ruby
Rubyでできるようになったことをたくさん紹介
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How to find targets?
そんなにネタがあるの？
Just I needed
単に自分が必要だったから
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Opening1
きっかけ1
Web feed
Webフィード
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RSS Parser
RSS/Atom parser
with
validation
バリデーション機能付きのRSS/Atomパーサー
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RSS Parser - History
歴史
✓ 2003-05: The first release
最初のリリース
✓ No other RSS/Atom parser that
supports validation even now
今でもバリデーション付きのパーサーは他にない
✓ 2004-01: Ruby bundles this
RubyがRSS Parserをバンドル
✓ I became a Ruby committer
Rubyコミッターになる
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Validate RSS/Atom
RSS/Atomのバリデーション
✓ Important for me
私にとっては大事
✓ Most wild RSS/Atom feeds are
invalid
野生のRSS/Atomの多くは不正
✓ Validation helps to find problems
バリデーションがあると問題を見つけやすくなる
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RSS::Parser.parse
# Validates by default
# デフォルトでバリデーション
RSS::Parser.parse(rss)
# Validation can be disabled
# 無効にできる
RSS::Parser.parse(rss, false)
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Since Ruby 2.6
Ruby 2.6以降
# Supports keyword argument
# キーワード引数対応
parse(rss, validate: false)
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REXML
XML parser
written in
pure Ruby
Ruby実装のXMLパーサー
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REXML - History
歴史
✓ 2001: Started by Sean Russell
Seanさんが開発を開始
✓ Based on Electric XML (Java)
Java実装のElectric XMLを参考に開発
✓ REXML is "Ruby Electric XML"
REXMLは「Ruby Electric XML」
✓ 2003-01: Ruby bundles this
RubyがREXMLをバンドル
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REXML - Side story
おまけ話
✓ Sean was "書運" in Kanji
Seanさんには「書運」という漢字表記があった
✓ He was interested in Japan
日本好きだった
✓ "How to write your name in Kanji?"
「君の名前は漢字でどう書くの？」
✓ We can connect with Ruby!
RubyistはRubyをきっかけにつながれる！
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Ad: Code Party
宣伝：コード懇親会
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Ad: Code Party
宣伝：コード懇親会
This is a challenge
実験的な企画
✓ Ruby focus: to have fun
Rubyは楽しさを大事にしている
✓ We have fun writing Ruby
Rubyistは楽しくRubyを書いている
✓ We have fun together with
writing Ruby at after party!?
だったら懇親会で一緒にRubyを書くと楽しそう！？
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Ad: Code Party
宣伝：コード懇親会
✓ Matz attends Code Party
まつもとさんもコード懇親会に参加
✓ Sponsored by Speee, Inc.
Speeeさんがスポンサー
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REXML - Recent1
最近1
✓ 2010-08: RubyKaigi 2010
✓ I became the maintainer
私がメンテナーになった
✓ Because RSS Parser uses it
RSS Parserが使っているから
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REXML - Recent2
最近2
✓ 2016: element[attribute_name]
✓ Ruby 2.5 ships it
Ruby 2.5以降で使える
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REXML - Recent3
最近3
✓ 2018: Fix XPath related bugs
XPath関連のバグ修正
✓ Ruby 2.6 ships it
Ruby 2.6以降で使える
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REXML - Future?
未来はあるの？
✓ Pure Ruby is valuable
Rubyだけで書かれていることには価値がある
✓ Easy to install
インストールが簡単
✓ JIT may improve performance
NOTE: We should improve general logic before we
expect JIT to improve performance
JITで速くなるかもしれない
JITの前に普通にロジックを改良するのが先だけどね
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Recent my works
最近の仕事
✓ XML/HTML libraries for LuaJIT
LuaJIT用のXML/HTMLライブラリー
✓ XMLua: https://clear-code.github.io/xmlua/
libxml2 based XML/HTML parser
✓ LuaCS: https://clear-code.github.io/luacs/
CSS Selectors→XPath converter
✓ Found what is lacking in
REXML API
REXMLのAPIに足りないものはなにか考えた
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REXML - Future1
未来1
Introduce
NodeSet
NodeSetが足りないんじゃないか
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REXML - NodeSet
doc.
search("//list"). # => NodeSet
search("item"). # => All <item> in <list>
text # All texts in <item> in <list>
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REXML - Future2
未来2
Support
CSS Selectors
CSSセレクターが足りないんじゃないか
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REXML - CSS Selectors
CSSセレクター
doc.css_select("ul li, dl dt")
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REXML - Future3
未来3
Support
HTML5 support
HTML5対応が足りないんじゃないか
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REXML - HTML5
doc = REXML::HTML5Document.new(html5)
doc.search("//li")
doc.css_select("ul li")
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REXML - Future
未来
✓ Low priority in my activities
優先度は高くない
✓ Do you want to work with me?
一緒にやりたい人はいる？
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Opening2
きっかけ1
Presentation
プレゼンテーション
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Rabbit
Presentation tool
Rubyist
for
Rubyist用のプレゼンツール
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Rabbit - History
歴史
✓ 2004-07: The first release
最初のリリース
✓ No other presentation tool for a
Rubyist even now
今でもRubyist用のプレゼンツールは他にない
✓ 2010: Matz migrated to Rabbit
まつもとさんがRabbitに乗り換えた
✓ Since RubyKaigi 2010?
RubyKaigi 2010から？
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For Rubyist?
Rubyist向けに必要なもの
RD support
RDサポート
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RD
✓ Ruby Document
✓ Designed by Matz
(Right?)
まつもとさんがデザインしたはず
✓ A text based markup language
テキストベースのマークアップ言語
✓ Version controllable
バージョン管理できる
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For Rubyist?
Rubyist向けに必要なもの
Publish
our slides
as usual
いつも通りスライドを公開できる
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Publish as usual
いつも通り公開
% gem push your-slide-1.0.gem
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Published!
公開完了！
https://slide.rabbit-shocker.org/
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What's needed for
presentation tool?
プレゼンツールに必要なもの
GUI
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Ruby/GTK3
Multi-platform
GUI toolkit
複数プラットフォーム対応GUIツールキット
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Ruby/GTK3 - History
歴史
✓ 1998-01: 1st release by Matz
[ruby-list:5877]
まつもとさんが最初のリリース
✓ 2004-05: I joined development
私が開発に参加
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Example - Window
require "gtk3"
app = Gtk::Application.new
app.signal_connect(:activate) do
window = Gtk::ApplicationWindow.new(app)
window.show_all
end
app.run
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Approaches on
missing libraries(1)
ライブラリーがない時のやり方（1）
1. Implement only the needed
features
必要な機能だけ実装
2. then back to Rabbit
必要な機能ができたらRabbitに戻る
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Approaches on
missing libraries(2)
ライブラリーがない時のやり方（2）
1. Implement not only the
needed features
必要な機能だけじゃなく
2. but also
almost
ほぼすべての機能を実装
all features
3. then back to Rabbit
終わったらRabbitに戻る
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My approach
私のやり方
Implement
all features
testing with Rabbit
すべての機能を実装
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My priority
私の優先度
✓ Rabbit is important
Rabbitは大事だけど
✓ Increasing what Ruby can do
is important too
Rubyでできることを増やすのも大事
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GTK+ 3 - Size
サイズ
3000 over APIs
3000以上のAPI
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How to implement
実装方法
Handwriting
↓
Auto generation
手書き
自動生成
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Ruby/GI
Generate bindings
automatically
at
run-time
実行時に自動でバインディングを生成
GI: GObject Introspection
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Ruby/GI - History
歴史
✓ 2012: The first commit by me
最初のコミット
✓ 2014: Ruby/GTK3 used Ruby/GI
Ruby/GTK3をRuby/GIベースに移行
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Handwriting
手書き
Handwritten bindings
libgtk-3
Ruby/GTK3
Ruby
script
Ruby
C
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Auto generation
自動生成
Generated at run-time
libgtk-3
Ruby/GTK3
Gtk-3.0.typelib
Ruby
script
Ruby/GI
GI = GObject Introspection
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Ruby
C
Data
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Performance （性能）
✓ Slower than handwriting
手書きより遅い
✓ Overhead
オーバーヘッド
✓ Dynamic arguments conversion
動的な引数の変換
✓ libffi based function call
libffiを使った関数呼び出し
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Improve idea （改善案）
JIT compiling
JITコンパイル
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$JIT compiling （JITコンパイル） VALUE rb_method_generic() { func = dlsym(name); ... ffi_call(func, ..., &result); return C2RB(result); } ↓ // Build rb_method() at run-time and call it. VALUE rb_method() {return C2RB(name(...));} My way with Ruby Powered by Rabbit 2.2.2$ Ruby/GI - See also
参考情報
✓ "How to create bindings
2016" at RubyKaigi 2016
✓ http://rubykaigi.org/2016/presentations/ktou.html
✓ "GI Introduction"
(in Japanese)
「GObject Introspection入門」
✓ https://github.com/RubyData/workshop-materials/
blob/master/gobject-introspection/introduction.md
✓ Build system: Meson + Ninja
ビルドシステム：Meson + Ninja
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Ruby/GI - See also
参考情報
✓ "How to create bindings
2016" at RubyKaigi 2016
✓ http://rubykaigi.org/2016/presentations/ktou.html
✓ "GI Introduction"
(in Japanese)
「GObject Introspection入門」
✓ https://github.com/RubyData/workshop-materials/
blob/master/gobject-introspection/introduction.md
✓ Build system: Meson + Ninja
ビルドシステム：Meson + Ninja
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/Pango
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Ruby/Pango
Text layout engine
with
i18n
support
国際化対応のテキストレイアウトエンジン
i18n: Internationalization
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Prohibition processing
禁則処理
widget.signal_connect(:draw) do |_, context|
layout = context.create_pango_layout
layout.text = "Helloこんにちは。 "
context.show_pango_layout(layout)
GLib::Source::CONTINUE
end
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Bidirectional text
双方向テキスト
Hello
‫ا‬ ‫ب‬ ‫ح‬ ‫ر‬ ‫م‬
こんにちは
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/GdkPixbuf2
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Ruby/GdkPixbuf2
Image
manipulation
画像操作
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Half image
画像を半分に
require "gdk_pixbuf2"
# Load an image: Format is auto detected
pixbuf = GdkPixbuf::Pixbuf.new(file: "x.png")
# Scale to half size
half = pixbuf.scale(pixbuf.width / 2,
pixbuf.height / 2,
:bilinear)
# Save as different format
half.save("half.jpg")
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Animated GIF
アニメーションGIF
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/Poppler
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Ruby/Poppler
PDF
parser/renderer
PDFパーサー・レンダラー
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Text extraction
テキスト抽出
require "poppler"
doc = Poppler::Document.new("x.pdf")
doc.each do |page|
puts(page.text) # Extract all texts
end
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Embed PDF
PDFの埋め込み
Improve extension API
C++ as better language for extension
Kouhei Sutou
ClearCode Inc.
RubyKaigi 2017
2017-09-18
Improve extension API - C++ as better language for extension
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http://rubykaigi.org/2017/presentations/ktou.html
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/GStreamer
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Ruby/GStreamer
Audio/Video
player
音声・動画プレイヤー
(*) Streaming media framework
本当はストリーミングメディアフレームワーク
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Camera （カメラ）
require "gst"
description = [
"autovideosrc", # Camera
"videoconvert", # Filter
"autovideosink", # Window
].join(" ! ")
pipeline = Gst.parse_launch(description)
pipeline.play
until pipeline.bus.poll.type.eos? do
end # Main loop
pipeline.stop
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Face detection （顔認識）
description = [
"autovideosrc", # Camera
"videoconvert", # Filter
"facedetect",
# Face detection (!)
"videoconvert", # Filter
(!)
"autovideosink", # Window
].join(" ! ")
pipeline = Gst.parse_launch(description)
pipeline.play
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What's needed for
presentation tool?
プレゼンツールに必要なもの
PDF output
PDF出力
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rcairo
2D graphics
renderer
2次元画像レンダラー
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rcairo - Outputs
出力
✓ PNG・SVG
✓ PDF
✓ Display (X/macOS/Windows)
✓ ...
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rcairo - History
歴史
✓ 2003-10: The initial commit
最初のコミット
✓ 2005-09: I started developing
私が開発に参加
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Red A4 PDF
赤いA4のPDFを出力
require "cairo"
include Cairo
PDFSurface.create("x.pdf", "A4") do |surface|
Context.create(surface) do |context|
context.set_source_color(:red)
context.paint
end
end
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rcairo - GC
1000.times do
Cairo::ImageSurface.new(:argb32, 6000, 6000)
end
15
14.5
14
13.5
13
12.5
12
11.5
11
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0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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GC - Cause （原因）
✓ GC isn't run often enough
GCの実行頻度が十分じゃなかった
✓ Because Ruby doesn't know how
much memory used by cairo
Rubyはcairoのメモリー使用量を知らないから
15
14.5
14
13.5
13
12.5
12
11.5
11
My way with Ruby
0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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GC - Fix （修正）
✓ rb_gc_adjust_memory_usage()
✓ Improve GC frequency （GC実行頻度を改善）
✓ Ruby 2.4 ships it （Ruby 2.4以降）
15
14.5
14
13.5
13
12.5
12
11.5
11
My way with Ruby
0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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What's needed for
presentation tool?
プレゼンツールに必要なもの
Easy to install
簡単インストール
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native-package-installer
Install
system packages
on gem install
gem install時にシステムのパッケージをインストール
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$extconf.rb/Rakefile require "pkg-config" require "native-package-installer" unless PKGConfig.check_version?("gdk-3.0") packages = { altlinux: "libgtk+3-devel", debian: "libgtk-3-dev", redhat: "pkgconfig(gdk-3.0)", homebrew: "gtk+3", macports: "gtk3", msys2: "gtk3", } unless NativePackageInstaller.install(packages) exit(false) end end My way with Ruby Powered by Rabbit 2.2.2$ rake-compiler
Build fat gem
by
cross compile
クロスコンパイルでfat gemをビルド
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rake-compiler
Build fat gem
by
cross compile
クロスコンパイルでfat gemをビルド
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rake-compiler - History
歴史
✓ 2008-11: The first commit
最初のコミット
✓ 2014-12: Orphan
だれかメンテナー変わってー
✓ 2014-12:
I became the maintainer
私がメンテナーになった
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Opening3
きっかけ3
Test
テスト
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test-unit
Testing
framework
to write tests
in Ruby
Rubyでテストを書けるテスティングフレームワーク
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test-unit - History
歴史
✓ 2003-02: Import to Ruby
Rubyに取り込まれる
✓ 2008-05:
I became the maintainer
私がメンテナーになった
✓ 2008-10: Removed from Ruby
Rubyから削除
See also: "The history of testing framework in Ruby"
http://rubykaigi.org/2015/presentations/kou
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test-unit - New feature
新機能
Grouping
グループ化
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Grouping
グループ化
✓ The most important feature
一番大事な機能
✓ Keep tests maintainable
メンテナンスできるテストを維持できる
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Example （例）
class StackTest < Test::Unit::TestCase
class PushTest < self
def test_XXX; end
end
class PopTest < self
def test_XXX; end
end
end
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Method style （メソッド形式）
class StackTest < Test::Unit::TestCase
sub_test_case("#push") do
def test_XXX; end
end
sub_test_case("#pop") do
def test_XXX; end
end
end
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test-unit - New feature
新機能
Data driven
test
データ駆動テスト
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Data driven test
データ駆動テスト
data("positive", [3, 1, 2])
data("negative", [-4, 1, -5])
def test_add(data)
expected, augend, addend = data
assert_equal(expected,
add(augend, addend))
end
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test-unit - New feature
新機能
Reverse
backtrace
逆順のバックトレース
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Reverse backtrace
逆順のバックトレース
✓ Reverse backtrace only for
terminal output
ターミナル出力のときだけ逆順
✓ The same change as Ruby 2.5.0
Ruby 2.5.0と同じ変更
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test-unit - New feature
新機能
Test double
テストダブル
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test-unit-rr
RR integration
RRとの統合
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RR - History
歴史
✓ 2007-06: The initial commit
最初のコミット
✓ 2014-12: Orphan
だれかメンテナー変わってー
✓ 2015-05:
I became the maintainer
私がメンテナーになった
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Stub （スタブ）
adder = Object.new
adder.add(1, 2) # => Error
stub(adder).add(1, 2) {3}
adder.add(1, 2) # => 3
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Opening4
きっかけ4
Full text
search
全文検索
My way with Ruby
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Rroonga
Full text
search
library
全文検索ライブラリー
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Library vs Client
ライブラリー対クライアント
✓ No server process
サーバープロセスがいらない
✓ Easy to start
簡単に使い始められる
✓ Write in Ruby
Rubyで書ける
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Create DB （データベース作成）
require "groonga"
Groonga::Database.create(path: "/tmp/db")
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Define schema （スキーマ定義）
Groonga::Schema.define do |schema|
schema.create_table("docs") do |table|
# The column to store text
table.text("content")
end
# The index for full text search
schema.create_lexicon("terms") do |table|
table.index("docs.content")
end
end
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Add records （レコード追加）
docs = Groonga["docs"]
docs.add(content: "String#<< concatenates ...")
docs.add(content: "String#dup duplicates ...")
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Search （検索）
matches = docs.select do |record|
record.content.match("concat")
end
p matches.size # => 1
matches.each do |record|
p record.content # => "String#<< concat..."
end
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User - Rabbit Slide Show
https://slide.rabbit-shocker.org/
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User - Rurema Search
https://docs.ruby-lang.org/ja/search/
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Rurema Search
るりまサーチ
✓ Super fast!
すごく速い！
✓ Tuned for Ruby documents
Rubyのドキュメント用にチューニング
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User - RDoc Search
✓ Planning
考えてはいるけど。。。
✓ Do you want to work with me?
一緒にやりたい人はいる？
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Rurema and RDoc
Project
Rurema Language
Japanese
RDoc English
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Target
Japanese
Rubyists
All
Rubyists
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Source
ソース
✓ Shared nothing
共有していない
✓ Copy based share
共有するときはコピー
✓ e.g.:
Description,
Sample codes,
...
例：説明やサンプルコードなどをコピー
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From my point of view
私が思うこと
✓ Can we share documents?
ドキュメントを共有できないかな
✓ How to work together deeply?
もっと協力してできないかな
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I18n
国際化
✓ Source: RDoc
ソースはRDoc
✓ For all Rubyists
これは全Rubyist向け
✓ Translate to Japanese
RDocのドキュメントを日本語に翻訳
✓ For Japanese Rubyists
これは日本人Rubyist向け
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Add i18n support
国際化サポートを追加
✓ YARD
✓ Since 0.8.0 at 2012-04
✓ RDoc
✓ Since 4.2.0 at 2014-12
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YARD - i18n
# Generates po/yard.pot
# po/yard.potを生成
% yard i18n
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$YARD - i18n # Create po/ja.po from po/yard.pot # po/yard.potからpo/ja.poを作成 % msginit \ --locale=ja_JP.UTF-8 \ --input=po/yard.pot \ --output-file=po/ja.po My way with Ruby Powered by Rabbit 2.2.2$ YARD - i18n
# Translate messages in po/ja.po
# po/ja.po内のメッセージを翻訳
% editor po/ja.po
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YARD - i18n
# Translate messages in po/ja.po
# po/ja.po内のメッセージを翻訳
% editor po/ja.po
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YARD - i18n
#
#
#
#
%
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Generate documents with
translated messages
翻訳したメッセージを使って
ドキュメント生成
yard --locale ja
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Packnga
Rake task
for
YARD i18n
YARDの国際化機能向けのRakeタスク
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Setting
設定
# Rakefile
require "packnga"
Packnga::DocumentTask.new(spec) do |task|
task.original_language = "en"
task.translate_languages = ["ja"]
end
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Workflow
ワークフロー
% rake reference:translate
% editor doc/po/ja/x.edit.po
% rake reference:translate
% editor lib/x.rb
% rake reference:translate
...
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Users
ユーザー
✓ test-unit
✓ Rroonga
✓ ...
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RDoc - i18n
# Generates doc/rdoc.pot
# doc/rdoc.potを生成
% rdoc --format=pot
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$RDoc - i18n # # # % % Create locale/ja.po from doc/rdoc.pot doc/rdoc.potからlocale/ja.poを作成 mkdir -p locale msginit \ --locale=ja_JP.UTF-8 \ --input=doc/rdoc.pot \ --output-file=locale/ja.po My way with Ruby Powered by Rabbit 2.2.2$ RDoc - i18n
# Translate messages in locale/ja.po
# locale/ja.po内のメッセージを翻訳
% editor locale/ja.po
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RDoc - i18n
# Translate messages in locale/ja.po
# locale/ja.po内のメッセージを翻訳
% editor locale/ja.po
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RDoc - i18n
#
#
#
#
%
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Generate documents with
translated messages
翻訳したメッセージを使って
ドキュメント生成
rdoc --locale ja
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RDoc, Rurema and i18n
✓ No progress...
ツールの整備まででそれ以降は進んでいない。。。
✓ Do you want to work with me?
一緒にやりたい人はいる？
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jekyll-task-i18n
Jekyll + i18n
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Features
機能
✓ Support all markups!
すべてのマークアップ対応！
✓ GitHub Pages ready!
GitHub Pagesでも使える！
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$Setting （設定） # Rakefile require "jekyll/task/i18n" Jekyll::Task::I18n.define do |task| task.locales = ["ja"] task.files = Rake::FileList["**/*.md"] task.files -= Rake::FileList["_*/**/*.md"] task.locales.each do |locale| task.files -= Rake::FileList["#{locale}/**/*.md"] end end task default: ["jekyll:i18n:translate"] My way with Ruby Powered by Rabbit 2.2.2$ Workflow （ワークフロー）
%
%
%
%
%
My way with Ruby
editor index.md
rake
editor _po/ja/index.edit.po
rake
git commit -a
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Workflow （ワークフロー）
%
%
%
%
%
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editor index.md
rake
editor _po/ja/index.edit.po
rake
git commit -a
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User - Red Data Tools
https://red-data-tools.github.io/
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groonga-client
Full text
search
client
全文検索クライアント
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Library vs Client
ライブラリー対クライアント
✓ Less dependencies
依存関係が少ない
✓ Less resources needed
必要なリソースが少ない
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Search （検索）
require "groonga/client"
url = "http://localhost:10041"
Groonga::Client.open(url: url) do |client|
response =
client.select(table: "docs",
match_columns: "content",
query: "concat")
p response.n_hits # => 1
end
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Asynchronous （非同期）
# Call with block
client.select(table: "docs",
match_columns: "content",
query: "concat") do |response|
p response.n_hits # => 1
end
p :here # => :here then ↑
sleep(0.1)
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Asynchronous - wait
request =
client.select(table: "docs",
match_columns: "content",
query: "concat") do |response|
p response.n_hits # => 1
end
p :here # => :here then ↑
request.wait
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groonga-client-rails
Ruby on Rails
integration
for
groonga-client
Ruby on Railsで使う
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Architecture
アーキテクチャー
✓ Data: RDBMS
データはRDBMSに格納
✓ Full text search: Groonga
全文検索はGroongaで処理
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Define app searcher
アプリ用サーチャーを定義
# app/searchers/application_searcher.rb
class ApplicationSearcher <
Groonga::Client::Searcher
end
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$Define searcher サーチャーを定義 # app/searchers/document_searcher.rb class DocumentsSearcher < ApplicationSearcher # Define a full text search index as "content" # 全文検索用のインデックスを定義 schema.column :content, { type: "Text", index: true, index_type: :full_text_search, } end My way with Ruby Powered by Rabbit 2.2.2$ Bind to model
モデルと結びつける
# app/models/document.rb
class Document < ApplicationRecord
# DocumentsSearcher searches Document model
source = DocumentsSearcher.source(self)
# Bind Document's "content" column to
# DocumentsSearcher's "content" index
source.content = :content
end
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Bind to model
モデルと結びつける
# app/models/document.rb
class Document < ApplicationRecord
# DocumentsSearcher searches Document model
source = DocumentsSearcher.source(self)
# Bind Document's "content" column to
# DocumentsSearcher's "content" index
source.content = :content
end
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Search （検索）
# app/controllers/documents_controller.rb
class DocumentsController < ApplicationController
def index
@query = params[:query]
searcher = DocumentSearcher.new
@result_set = searcher.search.
query(@query).
result_set
end
end
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See also
参考情報
✓ Tutorial in Japanese
日本語のチュートリアル
✓ http://www.clear-code.com/blog/2016/12/22.html
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Ranguba (WIP) （開発中）
Full text
search system
全文検索システム
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Use cases
利用例
✓ File server search
ファイルサーバー検索
✓ E-mail search
メール検索
✓ Web site search
Webサイト検索
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Features
機能
✓ Crawlers
クローラー
✓ Web UI
✓ Command line interface
✓ Update documents
更新
✓ Search documents
検索
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ChupaText
Text extractor
テキスト抽出
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Supported formats
対応フォーマット
✓ PDF
✓ Office documents （オフィス文書）
✓ OpenDocument, Word, Excel, ...
✓ E-mail （メール）
✓ ...
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Interface
インターフェイス
✓ HTTP
✓ Web UI
✓ Command line interface
✓ API (Library)
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$Install - Docker % GITHUB=https://github.com % git clone \ ${GITHUB}/ranguba/chupa-text-docker.git % cd chupa-text-docker % docker-compose up --build My way with Ruby Powered by Rabbit 2.2.2$ $How to use 使い方 % curl \ --form data=@XXX.pdf \ http://localhost:20080/extraction.json My way with Ruby Powered by Rabbit 2.2.2$ Use cases
利用例
✓ Ranguba
✓ Full text search system
全文検索システム
✓ Commit e-mail
コミットメール
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Use cases
利用例
✓ Ranguba
✓ Full text search system
全文検索システム
✓ Commit e-mail
コミットメール
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git-commit-mailer
Commit e-mail
for Git
Git用のコミットメール
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Features
機能
✓ HTML mail
HTMLメール
✓ Highlighted diff
diffをハイライト
✓ GitLab/GitHub Web hook
GitLab/GitHubのWebフック対応
✓ By GitHub:clear-code/github-web-hooks-receiver
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Users
利用者
✓ tDiary
✓ My products
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commit-email.info
Commit e-mail
as a
Service
コミットメールのクラウドサービス
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Opening5
きっかけ5
Data processing
データ処理
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csv
CSV parser
CSVパーサー
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csv - History
歴史
✓ 2003: Import
Rubyに取り込み
✓ 2007: Replaced with FasterCSV
FasterCSVで置き換え
✓ 2018: I became a co-
maintainer with mrkn
mrknと一緒にメンテナーになった
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Why?
なんで？
✓ There are many data sources
in CSV
CSVのデータはたくさんある
✓ Important to process data
データを処理するためにCSVパーサーは重要
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CSV format problems
CSVフォーマットの問題
✓ Slow to parse
パースが遅い
✓ Too wild
なんでもあり
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Red Arrow
Apache Arrow
Ruby
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Red Arrow - History
歴史
✓ 2017-02: The first commit
最初のコミット
✓ 2018-05: Became the
"official" Ruby bindings of
Apache Arrow
Apache Arrowの公式Rubyバインディングになった
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Apache Arrow
✓ Super fast data format
すごく速いデータフォーマット
✓ For in-memory data
インメモリーデータ用
✓ Cross-language support
いろんな言語がサポート
✓ Easy to share data with Python,
Java, ...
PythonやJavaなどとデータ交換がしやすい
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Performance （性能）
Apache Arrow
CSV
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
0
500
1000
1500
2000
2500
N rows
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Apache Arrow - Position
立ち位置
✓ A very important piece
in recent data processing
最近のデータ処理界隈ではすごく大事な1ピース
✓ Like JIT for Ruby 3
Ruby 3で例えるとJITみたいな感じ
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Red Arrow - Impl.
実装
✓ Based on Ruby/GI
Ruby/GIを使っている
✓ Auto generated bindings
バインディングを自動生成
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Extendable load API
拡張可能なロードAPI
# Load Apache Arrow data
Arrow::Table.load("iris.arrow")
# Load CSV data
Arrow::Table.load("iris.csv")
# Load Apache Parquet data
Arrow::Table.load("iris.parquet")
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Apache Parquet
✓ Super fast data format
すごく速いデータフォーマット
✓ For storing analysis target data
解析対象のデータを保存する用
✓ Widely used
広く使われている
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Performance （性能）
Apache Arrow
CSV
0.045
Apache Parquet
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
0
500
1000
1500
2000
2500
N rows
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Red Parquet
Apache Parquet
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Red Data Tools
A project to
make Ruby data
processable
Rubyでデータ処理できるようにするためのプロジェクト
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Red Data Tools - History
歴史
✓ 2017-02: Start （開始）
✓ 2017-11-: Develop events per
month at Tokyo
東京で毎月開発イベントを開催
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The number of products
プロダクト数
About 20
including Red Arrow and Red Parquet
20くらい
Red ArrowやRed ParquetもRed Data Toolsプロダクツ
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Red Datasets
Dataset fetcher
データセット取得
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Supported datasets
対応データセット
✓ Iris
✓ CIFAR
✓ Wikipedia
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Wikipedia
require "datasets"
wikipedia = Datasets::Wikipedia.new
wikipedia.each do |page|
p page.title
end
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Wikipedia search
pages = Groonga["pages"]
wikipedia = Datasets::Wikipedia.new
wikipedia.each do |page|
pages.add(title: page.title,
content: page.revision.text)
end
ruby_pages = pages.select do |record|
record.match("Ruby OR Rails") do |target|
(target.title * 10) | target.content
end
end
p ruby_pages.size
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jekyll-jupyter-notebook
Jekyll
+
Jupyter
Notebook
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$Usage 使い方 {% jupyter_notebook sample.ipynb %} My way with Ruby Powered by Rabbit 2.2.2$ Red OpenCV
Computer vision
コンピュータービジョン
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Red OpenCV
Computer vision
コンピュータービジョン
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Camera （カメラ）
require "cv"
camera = CV::Camera.new
image = camera.read
image.write("capture.jpg")
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Face detect （顔認識）
image_gray = image.convert_color(:bgr2gray)
classifier = # Face detector
CV::CascadeClassifier.new("frontalface_alt")
objects = classifier.detect(image_gray)
color = CV::Color.new(0, 0, 255)
objects.each do |object|
# Draw detected area
image.draw_rectangle(object, color)
end
image.write("detect.jpg")
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Red OpenCV - Impl.
実装
✓ Based on Ruby/GI
Ruby/GIを使っている
✓ Auto generated bindings
バインディングを自動生成
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Ad: RubyData Workshop
✓ 2018-06-01 15:50/17:20
✓ Contents: （内容）
✓ Workshop by mrkn
mrknによるワークショップ
✓ Presentations from
Red Data Tools members
Red Data ToolsメンバーによるRed Data Toolsでやって
きたことの紹介
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Process data with Ruby
Rubyでデータ処理
✓ We're working on it
Red Data Toolsは継続して取り組んでいる
✓ Do you want to work with us?
一緒にやりたい人はいる？
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How to join1 （参加方法1）
✓ Join our chat rooms:
チャットルームに参加
✓ en: Gitter:red-data-tools/en
✓ ja: Gitter:red-data-tools/ja
✓ Join monthly events at Tokyo
東京での毎月の開発イベントに参加
✓ https://speee.connpass.com/
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How to join2 （参加方法2）
✓ Hire developers to work on it
仕事として開発する開発者を雇う
✓ e.g.: mrkn by Speee, Inc.
例：Speeeの村田さん
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How to join3 （参加方法3）
✓ Order ClearCode to work on it
クリアコードに開発の仕事を発注
✓ Join ClearCode to work on it
クリアコードに入って仕事として開発を進める
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Wrap up
まとめ
✓ I'm working on the following
as a Rubyist
Rubyistとしての私の活動
✓ Increase what Ruby can do
with free software
フリーソフトウェアを使ってRubyでできることを増やす
✓ Maintain libraries
ライブラリーのメンテナス
✓ Do you want to work with me?
一緒にやりたい人はいる？
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$Usage 使い方 {% jupyter_notebook sample.ipynb %} My way with Ruby Powered by Rabbit 2.2.2$ Red OpenCV
Computer vision
コンピュータービジョン
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Description

Here are my activities as a Rubyist: * Increase what Ruby can do with free software * Maintain libraries In this talk, I introduce my activities.

Text

Page: 1

My way with Ruby
Kouhei Sutou
ClearCode Inc.
RubyKaigi 2018
2018-06-01
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Page: 2

Ad: Silver sponsor
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Page: 3

Acknowledgment
感謝
@drbrain
Eric Hodel
He fixed English in this slide
英語をチェックしてくれたよ！ありがとう！
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Page: 4

Keynote-ish topic
キーノートっぽい話題
Did you think
about it?
考えたことある？
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Page: 5

Keynote-ish topic1
キーノートっぽい話題1
Future
未来のこと
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Page: 6

Keynote-ish topic2
キーノートっぽい話題2
Focus on
one thing
deeply
なにかを深掘り
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Page: 7

Keynote-ish topic3
キーノートっぽい話題3
Overview
俯瞰した話
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Page: 8

My activities
as a Rubyist
私のRubyist活動
✓ Increase what Ruby can do
with free software
フリーソフトウェアを使ってRubyでできることを増やす
✓ Maintain libraries
ライブラリーのメンテナンス
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Page: 9

# of libraries maintained
メンテナンスしているライブラリー数
About 130
130くらい
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Page: 10

Today's topic
今日の話題
Overview
what we can do
with Ruby
Rubyでできるようになったことをたくさん紹介
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Page: 11

How to find targets?
そんなにネタがあるの？
Just I needed
単に自分が必要だったから
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Page: 12

Opening1
きっかけ1
Web feed
Webフィード
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RSS Parser
RSS/Atom parser
with
validation
バリデーション機能付きのRSS/Atomパーサー
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RSS Parser - History
歴史
✓ 2003-05: The first release
最初のリリース
✓ No other RSS/Atom parser that
supports validation even now
今でもバリデーション付きのパーサーは他にない
✓ 2004-01: Ruby bundles this
RubyがRSS Parserをバンドル
✓ I became a Ruby committer
Rubyコミッターになる
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Validate RSS/Atom
RSS/Atomのバリデーション
✓ Important for me
私にとっては大事
✓ Most wild RSS/Atom feeds are
invalid
野生のRSS/Atomの多くは不正
✓ Validation helps to find problems
バリデーションがあると問題を見つけやすくなる
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RSS::Parser.parse
# Validates by default
# デフォルトでバリデーション
RSS::Parser.parse(rss)
# Validation can be disabled
# 無効にできる
RSS::Parser.parse(rss, false)
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Since Ruby 2.6
Ruby 2.6以降
# Supports keyword argument
# キーワード引数対応
parse(rss, validate: false)
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REXML
XML parser
written in
pure Ruby
Ruby実装のXMLパーサー
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REXML - History
歴史
✓ 2001: Started by Sean Russell
Seanさんが開発を開始
✓ Based on Electric XML (Java)
Java実装のElectric XMLを参考に開発
✓ REXML is "Ruby Electric XML"
REXMLは「Ruby Electric XML」
✓ 2003-01: Ruby bundles this
RubyがREXMLをバンドル
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REXML - Side story
おまけ話
✓ Sean was "書運" in Kanji
Seanさんには「書運」という漢字表記があった
✓ He was interested in Japan
日本好きだった
✓ "How to write your name in Kanji?"
「君の名前は漢字でどう書くの？」
✓ We can connect with Ruby!
RubyistはRubyをきっかけにつながれる！
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Ad: Code Party
宣伝：コード懇親会
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Ad: Code Party
宣伝：コード懇親会
This is a challenge
実験的な企画
✓ Ruby focus: to have fun
Rubyは楽しさを大事にしている
✓ We have fun writing Ruby
Rubyistは楽しくRubyを書いている
✓ We have fun together with
writing Ruby at after party!?
だったら懇親会で一緒にRubyを書くと楽しそう！？
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Ad: Code Party
宣伝：コード懇親会
✓ Matz attends Code Party
まつもとさんもコード懇親会に参加
✓ Sponsored by Speee, Inc.
Speeeさんがスポンサー
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REXML - Recent1
最近1
✓ 2010-08: RubyKaigi 2010
✓ I became the maintainer
私がメンテナーになった
✓ Because RSS Parser uses it
RSS Parserが使っているから
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REXML - Recent2
最近2
✓ 2016: element[attribute_name]
✓ Ruby 2.5 ships it
Ruby 2.5以降で使える
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REXML - Recent3
最近3
✓ 2018: Fix XPath related bugs
XPath関連のバグ修正
✓ Ruby 2.6 ships it
Ruby 2.6以降で使える
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REXML - Future?
未来はあるの？
✓ Pure Ruby is valuable
Rubyだけで書かれていることには価値がある
✓ Easy to install
インストールが簡単
✓ JIT may improve performance
NOTE: We should improve general logic before we
expect JIT to improve performance
JITで速くなるかもしれない
JITの前に普通にロジックを改良するのが先だけどね
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Recent my works
最近の仕事
✓ XML/HTML libraries for LuaJIT
LuaJIT用のXML/HTMLライブラリー
✓ XMLua: https://clear-code.github.io/xmlua/
libxml2 based XML/HTML parser
✓ LuaCS: https://clear-code.github.io/luacs/
CSS Selectors→XPath converter
✓ Found what is lacking in
REXML API
REXMLのAPIに足りないものはなにか考えた
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REXML - Future1
未来1
Introduce
NodeSet
NodeSetが足りないんじゃないか
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REXML - NodeSet
doc.
search("//list"). # => NodeSet
search("item"). # => All <item> in <list>
text # All texts in <item> in <list>
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REXML - Future2
未来2
Support
CSS Selectors
CSSセレクターが足りないんじゃないか
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REXML - CSS Selectors
CSSセレクター
doc.css_select("ul li, dl dt")
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REXML - Future3
未来3
Support
HTML5 support
HTML5対応が足りないんじゃないか
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REXML - HTML5
doc = REXML::HTML5Document.new(html5)
doc.search("//li")
doc.css_select("ul li")
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REXML - Future
未来
✓ Low priority in my activities
優先度は高くない
✓ Do you want to work with me?
一緒にやりたい人はいる？
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Opening2
きっかけ1
Presentation
プレゼンテーション
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Rabbit
Presentation tool
Rubyist
for
Rubyist用のプレゼンツール
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Rabbit - History
歴史
✓ 2004-07: The first release
最初のリリース
✓ No other presentation tool for a
Rubyist even now
今でもRubyist用のプレゼンツールは他にない
✓ 2010: Matz migrated to Rabbit
まつもとさんがRabbitに乗り換えた
✓ Since RubyKaigi 2010?
RubyKaigi 2010から？
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For Rubyist?
Rubyist向けに必要なもの
RD support
RDサポート
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RD
✓ Ruby Document
✓ Designed by Matz
(Right?)
まつもとさんがデザインしたはず
✓ A text based markup language
テキストベースのマークアップ言語
✓ Version controllable
バージョン管理できる
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For Rubyist?
Rubyist向けに必要なもの
Publish
our slides
as usual
いつも通りスライドを公開できる
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Publish as usual
いつも通り公開
% gem push your-slide-1.0.gem
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Published!
公開完了！
https://slide.rabbit-shocker.org/
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What's needed for
presentation tool?
プレゼンツールに必要なもの
GUI
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Ruby/GTK3
Multi-platform
GUI toolkit
複数プラットフォーム対応GUIツールキット
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Ruby/GTK3 - History
歴史
✓ 1998-01: 1st release by Matz
[ruby-list:5877]
まつもとさんが最初のリリース
✓ 2004-05: I joined development
私が開発に参加
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Example - Window
require "gtk3"
app = Gtk::Application.new
app.signal_connect(:activate) do
window = Gtk::ApplicationWindow.new(app)
window.show_all
end
app.run
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Approaches on
missing libraries(1)
ライブラリーがない時のやり方（1）
1. Implement only the needed
features
必要な機能だけ実装
2. then back to Rabbit
必要な機能ができたらRabbitに戻る
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Approaches on
missing libraries(2)
ライブラリーがない時のやり方（2）
1. Implement not only the
needed features
必要な機能だけじゃなく
2. but also
almost
ほぼすべての機能を実装
all features
3. then back to Rabbit
終わったらRabbitに戻る
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My approach
私のやり方
Implement
all features
testing with Rabbit
すべての機能を実装
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My priority
私の優先度
✓ Rabbit is important
Rabbitは大事だけど
✓ Increasing what Ruby can do
is important too
Rubyでできることを増やすのも大事
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GTK+ 3 - Size
サイズ
3000 over APIs
3000以上のAPI
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How to implement
実装方法
Handwriting
↓
Auto generation
手書き
自動生成
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Ruby/GI
Generate bindings
automatically
at
run-time
実行時に自動でバインディングを生成
GI: GObject Introspection
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Ruby/GI - History
歴史
✓ 2012: The first commit by me
最初のコミット
✓ 2014: Ruby/GTK3 used Ruby/GI
Ruby/GTK3をRuby/GIベースに移行
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Handwriting
手書き
Handwritten bindings
libgtk-3
Ruby/GTK3
Ruby
script
Ruby
C
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Auto generation
自動生成
Generated at run-time
libgtk-3
Ruby/GTK3
Gtk-3.0.typelib
Ruby
script
Ruby/GI
GI = GObject Introspection
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C
Data
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Performance （性能）
✓ Slower than handwriting
手書きより遅い
✓ Overhead
オーバーヘッド
✓ Dynamic arguments conversion
動的な引数の変換
✓ libffi based function call
libffiを使った関数呼び出し
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Improve idea （改善案）
JIT compiling
JITコンパイル
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JIT compiling （JITコンパイル）
VALUE rb_method_generic() {
func = dlsym(name); ...
ffi_call(func, ..., &result);
return C2RB(result);
} ↓
// Build rb_method() at run-time and call it.
VALUE rb_method() {return C2RB(name(...));}
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Ruby/GI - See also
参考情報
✓ "How to create bindings
2016" at RubyKaigi 2016
✓ http://rubykaigi.org/2016/presentations/ktou.html
✓ "GI Introduction"
(in Japanese)
「GObject Introspection入門」
✓ https://github.com/RubyData/workshop-materials/
blob/master/gobject-introspection/introduction.md
✓ Build system: Meson + Ninja
ビルドシステム：Meson + Ninja
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/Pango
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Ruby/Pango
Text layout engine
with
i18n
support
国際化対応のテキストレイアウトエンジン
i18n: Internationalization
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Prohibition processing
禁則処理
widget.signal_connect(:draw) do |_, context|
layout = context.create_pango_layout
layout.text = "Helloこんにちは。 "
context.show_pango_layout(layout)
GLib::Source::CONTINUE
end
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Bidirectional text
双方向テキスト
Hello
‫ا‬ ‫ب‬ ‫ح‬ ‫ر‬ ‫م‬
こんにちは
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/GdkPixbuf2
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Ruby/GdkPixbuf2
Image
manipulation
画像操作
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Half image
画像を半分に
require "gdk_pixbuf2"
# Load an image: Format is auto detected
pixbuf = GdkPixbuf::Pixbuf.new(file: "x.png")
# Scale to half size
half = pixbuf.scale(pixbuf.width / 2,
pixbuf.height / 2,
:bilinear)
# Save as different format
half.save("half.jpg")
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Animated GIF
アニメーションGIF
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/Poppler
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Ruby/Poppler
PDF
parser/renderer
PDFパーサー・レンダラー
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Text extraction
テキスト抽出
require "poppler"
doc = Poppler::Document.new("x.pdf")
doc.each do |page|
puts(page.text) # Extract all texts
end
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Embed PDF
PDFの埋め込み
Improve extension API
C++ as better language for extension
Kouhei Sutou
ClearCode Inc.
RubyKaigi 2017
2017-09-18
Improve extension API - C++ as better language for extension
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http://rubykaigi.org/2017/presentations/ktou.html
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Ruby/GI based bindings
Ruby/GIベースのバインディング
Ruby/GStreamer
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Ruby/GStreamer
Audio/Video
player
音声・動画プレイヤー
(*) Streaming media framework
本当はストリーミングメディアフレームワーク
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Camera （カメラ）
require "gst"
description = [
"autovideosrc", # Camera
"videoconvert", # Filter
"autovideosink", # Window
].join(" ! ")
pipeline = Gst.parse_launch(description)
pipeline.play
until pipeline.bus.poll.type.eos? do
end # Main loop
pipeline.stop
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Face detection （顔認識）
description = [
"autovideosrc", # Camera
"videoconvert", # Filter
"facedetect",
# Face detection (!)
"videoconvert", # Filter
(!)
"autovideosink", # Window
].join(" ! ")
pipeline = Gst.parse_launch(description)
pipeline.play
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What's needed for
presentation tool?
プレゼンツールに必要なもの
PDF output
PDF出力
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rcairo
2D graphics
renderer
2次元画像レンダラー
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rcairo - Outputs
出力
✓ PNG・SVG
✓ PDF
✓ Display (X/macOS/Windows)
✓ ...
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rcairo - History
歴史
✓ 2003-10: The initial commit
最初のコミット
✓ 2005-09: I started developing
私が開発に参加
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Red A4 PDF
赤いA4のPDFを出力
require "cairo"
include Cairo
PDFSurface.create("x.pdf", "A4") do |surface|
Context.create(surface) do |context|
context.set_source_color(:red)
context.paint
end
end
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rcairo - GC
1000.times do
Cairo::ImageSurface.new(:argb32, 6000, 6000)
end
15
14.5
14
13.5
13
12.5
12
11.5
11
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0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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GC - Cause （原因）
✓ GC isn't run often enough
GCの実行頻度が十分じゃなかった
✓ Because Ruby doesn't know how
much memory used by cairo
Rubyはcairoのメモリー使用量を知らないから
15
14.5
14
13.5
13
12.5
12
11.5
11
My way with Ruby
0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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GC - Fix （修正）
✓ rb_gc_adjust_memory_usage()
✓ Improve GC frequency （GC実行頻度を改善）
✓ Ruby 2.4 ships it （Ruby 2.4以降）
15
14.5
14
13.5
13
12.5
12
11.5
11
My way with Ruby
0
100
200
300
400
500
Nth loop
600
700
800
900
1000
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What's needed for
presentation tool?
プレゼンツールに必要なもの
Easy to install
簡単インストール
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native-package-installer
Install
system packages
on gem install
gem install時にシステムのパッケージをインストール
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extconf.rb/Rakefile
require "pkg-config"
require "native-package-installer"
unless PKGConfig.check_version?("gdk-3.0")
packages = {
altlinux: "libgtk+3-devel",
debian: "libgtk-3-dev",
redhat: "pkgconfig(gdk-3.0)",
homebrew: "gtk+3",
macports: "gtk3",
msys2: "gtk3",
}
unless NativePackageInstaller.install(packages)
exit(false)
end
end
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rake-compiler
Build fat gem
by
cross compile
クロスコンパイルでfat gemをビルド
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rake-compiler - History
歴史
✓ 2008-11: The first commit
最初のコミット
✓ 2014-12: Orphan
だれかメンテナー変わってー
✓ 2014-12:
I became the maintainer
私がメンテナーになった
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Opening3
きっかけ3
Test
テスト
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test-unit
Testing
framework
to write tests
in Ruby
Rubyでテストを書けるテスティングフレームワーク
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test-unit - History
歴史
✓ 2003-02: Import to Ruby
Rubyに取り込まれる
✓ 2008-05:
I became the maintainer
私がメンテナーになった
✓ 2008-10: Removed from Ruby
Rubyから削除
See also: "The history of testing framework in Ruby"
http://rubykaigi.org/2015/presentations/kou
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test-unit - New feature
新機能
Grouping
グループ化
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Grouping
グループ化
✓ The most important feature
一番大事な機能
✓ Keep tests maintainable
メンテナンスできるテストを維持できる
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Example （例）
class StackTest < Test::Unit::TestCase
class PushTest < self
def test_XXX; end
end
class PopTest < self
def test_XXX; end
end
end
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Method style （メソッド形式）
class StackTest < Test::Unit::TestCase
sub_test_case("#push") do
def test_XXX; end
end
sub_test_case("#pop") do
def test_XXX; end
end
end
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test-unit - New feature
新機能
Data driven
test
データ駆動テスト
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Data driven test
データ駆動テスト
data("positive", [3, 1, 2])
data("negative", [-4, 1, -5])
def test_add(data)
expected, augend, addend = data
assert_equal(expected,
add(augend, addend))
end
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test-unit - New feature
新機能
Reverse
backtrace
逆順のバックトレース
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Reverse backtrace
逆順のバックトレース
✓ Reverse backtrace only for
terminal output
ターミナル出力のときだけ逆順
✓ The same change as Ruby 2.5.0
Ruby 2.5.0と同じ変更
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test-unit - New feature
新機能
Test double
テストダブル
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test-unit-rr
RR integration
RRとの統合
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RR - History
歴史
✓ 2007-06: The initial commit
最初のコミット
✓ 2014-12: Orphan
だれかメンテナー変わってー
✓ 2015-05:
I became the maintainer
私がメンテナーになった
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Stub （スタブ）
adder = Object.new
adder.add(1, 2) # => Error
stub(adder).add(1, 2) {3}
adder.add(1, 2) # => 3
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Opening4
きっかけ4
Full text
search
全文検索
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Rroonga
Full text
search
library
全文検索ライブラリー
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Library vs Client
ライブラリー対クライアント
✓ No server process
サーバープロセスがいらない
✓ Easy to start
簡単に使い始められる
✓ Write in Ruby
Rubyで書ける
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Create DB （データベース作成）
require "groonga"
Groonga::Database.create(path: "/tmp/db")
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Define schema （スキーマ定義）
Groonga::Schema.define do |schema|
schema.create_table("docs") do |table|
# The column to store text
table.text("content")
end
# The index for full text search
schema.create_lexicon("terms") do |table|
table.index("docs.content")
end
end
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Add records （レコード追加）
docs = Groonga["docs"]
docs.add(content: "String#<< concatenates ...")
docs.add(content: "String#dup duplicates ...")
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Search （検索）
matches = docs.select do |record|
record.content.match("concat")
end
p matches.size # => 1
matches.each do |record|
p record.content # => "String#<< concat..."
end
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User - Rabbit Slide Show
https://slide.rabbit-shocker.org/
My way with Ruby
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User - Rurema Search
https://docs.ruby-lang.org/ja/search/
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Rurema Search
るりまサーチ
✓ Super fast!
すごく速い！
✓ Tuned for Ruby documents
Rubyのドキュメント用にチューニング
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User - RDoc Search
✓ Planning
考えてはいるけど。。。
✓ Do you want to work with me?
一緒にやりたい人はいる？
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Rurema and RDoc
Project
Rurema Language
Japanese
RDoc English
My way with Ruby
Target
Japanese
Rubyists
All
Rubyists
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Source
ソース
✓ Shared nothing
共有していない
✓ Copy based share
共有するときはコピー
✓ e.g.:
Description,
Sample codes,
...
例：説明やサンプルコードなどをコピー
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From my point of view
私が思うこと
✓ Can we share documents?
ドキュメントを共有できないかな
✓ How to work together deeply?
もっと協力してできないかな
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I18n
国際化
✓ Source: RDoc
ソースはRDoc
✓ For all Rubyists
これは全Rubyist向け
✓ Translate to Japanese
RDocのドキュメントを日本語に翻訳
✓ For Japanese Rubyists
これは日本人Rubyist向け
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Add i18n support
国際化サポートを追加
✓ YARD
✓ Since 0.8.0 at 2012-04
✓ RDoc
✓ Since 4.2.0 at 2014-12
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YARD - i18n
# Generates po/yard.pot
# po/yard.potを生成
% yard i18n
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YARD - i18n
# Create po/ja.po from po/yard.pot
# po/yard.potからpo/ja.poを作成
% msginit \
--locale=ja_JP.UTF-8 \
--input=po/yard.pot \
--output-file=po/ja.po
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YARD - i18n
# Translate messages in po/ja.po
# po/ja.po内のメッセージを翻訳
% editor po/ja.po
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YARD - i18n
#
#
#
#
%
My way with Ruby
Generate documents with
translated messages
翻訳したメッセージを使って
ドキュメント生成
yard --locale ja
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Packnga
Rake task
for
YARD i18n
YARDの国際化機能向けのRakeタスク
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Setting
設定
# Rakefile
require "packnga"
Packnga::DocumentTask.new(spec) do |task|
task.original_language = "en"
task.translate_languages = ["ja"]
end
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Workflow
ワークフロー
% rake reference:translate
% editor doc/po/ja/x.edit.po
% rake reference:translate
% editor lib/x.rb
% rake reference:translate
...
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Users
ユーザー
✓ test-unit
✓ Rroonga
✓ ...
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RDoc - i18n
# Generates doc/rdoc.pot
# doc/rdoc.potを生成
% rdoc --format=pot
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RDoc - i18n
#
#
#
%
%
Create locale/ja.po
from doc/rdoc.pot
doc/rdoc.potからlocale/ja.poを作成
mkdir -p locale
msginit \
--locale=ja_JP.UTF-8 \
--input=doc/rdoc.pot \
--output-file=locale/ja.po
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RDoc - i18n
# Translate messages in locale/ja.po
# locale/ja.po内のメッセージを翻訳
% editor locale/ja.po
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RDoc - i18n
#
#
#
#
%
My way with Ruby
Generate documents with
translated messages
翻訳したメッセージを使って
ドキュメント生成
rdoc --locale ja
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RDoc, Rurema and i18n
✓ No progress...
ツールの整備まででそれ以降は進んでいない。。。
✓ Do you want to work with me?
一緒にやりたい人はいる？
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jekyll-task-i18n
Jekyll + i18n
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Features
機能
✓ Support all markups!
すべてのマークアップ対応！
✓ GitHub Pages ready!
GitHub Pagesでも使える！
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Setting （設定）
# Rakefile
require "jekyll/task/i18n"
Jekyll::Task::I18n.define do |task|
task.locales = ["ja"]
task.files = Rake::FileList["**/*.md"]
task.files -= Rake::FileList["_*/**/*.md"]
task.locales.each do |locale|
task.files -= Rake::FileList["#{locale}/**/*.md"]
end
end
task default: ["jekyll:i18n:translate"]
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Workflow （ワークフロー）
%
%
%
%
%
My way with Ruby
editor index.md
rake
editor _po/ja/index.edit.po
rake
git commit -a
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User - Red Data Tools
https://red-data-tools.github.io/
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groonga-client
Full text
search
client
全文検索クライアント
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Library vs Client
ライブラリー対クライアント
✓ Less dependencies
依存関係が少ない
✓ Less resources needed
必要なリソースが少ない
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Search （検索）
require "groonga/client"
url = "http://localhost:10041"
Groonga::Client.open(url: url) do |client|
response =
client.select(table: "docs",
match_columns: "content",
query: "concat")
p response.n_hits # => 1
end
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Asynchronous （非同期）
# Call with block
client.select(table: "docs",
match_columns: "content",
query: "concat") do |response|
p response.n_hits # => 1
end
p :here # => :here then ↑
sleep(0.1)
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Asynchronous - wait
request =
client.select(table: "docs",
match_columns: "content",
query: "concat") do |response|
p response.n_hits # => 1
end
p :here # => :here then ↑
request.wait
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groonga-client-rails
Ruby on Rails
integration
for
groonga-client
Ruby on Railsで使う
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Architecture
アーキテクチャー
✓ Data: RDBMS
データはRDBMSに格納
✓ Full text search: Groonga
全文検索はGroongaで処理
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Define app searcher
アプリ用サーチャーを定義
# app/searchers/application_searcher.rb
class ApplicationSearcher <
Groonga::Client::Searcher
end
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Define searcher
サーチャーを定義
# app/searchers/document_searcher.rb
class DocumentsSearcher < ApplicationSearcher
# Define a full text search index as "content"
# 全文検索用のインデックスを定義
schema.column :content, {
type: "Text",
index: true,
index_type: :full_text_search,
}
end
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Bind to model
モデルと結びつける
# app/models/document.rb
class Document < ApplicationRecord
# DocumentsSearcher searches Document model
source = DocumentsSearcher.source(self)
# Bind Document's "content" column to
# DocumentsSearcher's "content" index
source.content = :content
end
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Search （検索）
# app/controllers/documents_controller.rb
class DocumentsController < ApplicationController
def index
@query = params[:query]
searcher = DocumentSearcher.new
@result_set = searcher.search.
query(@query).
result_set
end
end
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See also
参考情報
✓ Tutorial in Japanese
日本語のチュートリアル
✓ http://www.clear-code.com/blog/2016/12/22.html
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Ranguba (WIP) （開発中）
Full text
search system
全文検索システム
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Use cases
利用例
✓ File server search
ファイルサーバー検索
✓ E-mail search
メール検索
✓ Web site search
Webサイト検索
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Features
機能
✓ Crawlers
クローラー
✓ Web UI
✓ Command line interface
✓ Update documents
更新
✓ Search documents
検索
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ChupaText
Text extractor
テキスト抽出
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Supported formats
対応フォーマット
✓ PDF
✓ Office documents （オフィス文書）
✓ OpenDocument, Word, Excel, ...
✓ E-mail （メール）
✓ ...
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Interface
インターフェイス
✓ HTTP
✓ Web UI
✓ Command line interface
✓ API (Library)
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Install - Docker
% GITHUB=https://github.com
% git clone \
${GITHUB}/ranguba/chupa-text-docker.git
% cd chupa-text-docker
% docker-compose up --build
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How to use
使い方
% curl \
--form data=@XXX.pdf \
http://localhost:20080/extraction.json
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Use cases
利用例
✓ Ranguba
✓ Full text search system
全文検索システム
✓ Commit e-mail
コミットメール
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git-commit-mailer
Commit e-mail
for Git
Git用のコミットメール
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Features
機能
✓ HTML mail
HTMLメール
✓ Highlighted diff
diffをハイライト
✓ GitLab/GitHub Web hook
GitLab/GitHubのWebフック対応
✓ By GitHub:clear-code/github-web-hooks-receiver
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Users
利用者
✓ tDiary
✓ My products
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commit-email.info
Commit e-mail
as a
Service
コミットメールのクラウドサービス
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How to use
使い方
✓ Send a pull request to
GitHub:kou/commit-email.info
pull requestを送る
✓ Register a Web hook
Webフックを登録
✓ Subscribe your mailing list
メーリングリストを購読
See also http://www.commit-email.info/
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Opening5
きっかけ5
Data processing
データ処理
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csv
CSV parser
CSVパーサー
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csv - History
歴史
✓ 2003: Import
Rubyに取り込み
✓ 2007: Replaced with FasterCSV
FasterCSVで置き換え
✓ 2018: I became a co-
maintainer with mrkn
mrknと一緒にメンテナーになった
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Why?
なんで？
✓ There are many data sources
in CSV
CSVのデータはたくさんある
✓ Important to process data
データを処理するためにCSVパーサーは重要
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CSV format problems
CSVフォーマットの問題
✓ Slow to parse
パースが遅い
✓ Too wild
なんでもあり
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Red Arrow
Apache Arrow
Ruby
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Red Arrow - History
歴史
✓ 2017-02: The first commit
最初のコミット
✓ 2018-05: Became the
"official" Ruby bindings of
Apache Arrow
Apache Arrowの公式Rubyバインディングになった
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Apache Arrow
✓ Super fast data format
すごく速いデータフォーマット
✓ For in-memory data
インメモリーデータ用
✓ Cross-language support
いろんな言語がサポート
✓ Easy to share data with Python,
Java, ...
PythonやJavaなどとデータ交換がしやすい
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Performance （性能）
Apache Arrow
CSV
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
0
500
1000
1500
2000
2500
N rows
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Apache Arrow - Position
立ち位置
✓ A very important piece
in recent data processing
最近のデータ処理界隈ではすごく大事な1ピース
✓ Like JIT for Ruby 3
Ruby 3で例えるとJITみたいな感じ
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Red Arrow - Impl.
実装
✓ Based on Ruby/GI
Ruby/GIを使っている
✓ Auto generated bindings
バインディングを自動生成
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Extendable load API
拡張可能なロードAPI
# Load Apache Arrow data
Arrow::Table.load("iris.arrow")
# Load CSV data
Arrow::Table.load("iris.csv")
# Load Apache Parquet data
Arrow::Table.load("iris.parquet")
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Apache Parquet
✓ Super fast data format
すごく速いデータフォーマット
✓ For storing analysis target data
解析対象のデータを保存する用
✓ Widely used
広く使われている
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Performance （性能）
Apache Arrow
CSV
0.045
Apache Parquet
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
0
500
1000
1500
2000
2500
N rows
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Red Parquet
Apache Parquet
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Red Data Tools
A project to
make Ruby data
processable
Rubyでデータ処理できるようにするためのプロジェクト
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Red Data Tools - History
歴史
✓ 2017-02: Start （開始）
✓ 2017-11-: Develop events per
month at Tokyo
東京で毎月開発イベントを開催
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The number of products
プロダクト数
About 20
including Red Arrow and Red Parquet
20くらい
Red ArrowやRed ParquetもRed Data Toolsプロダクツ
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Red Datasets
Dataset fetcher
データセット取得
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Supported datasets
対応データセット
✓ Iris
✓ CIFAR
✓ Wikipedia
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Wikipedia
require "datasets"
wikipedia = Datasets::Wikipedia.new
wikipedia.each do |page|
p page.title
end
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Wikipedia search
pages = Groonga["pages"]
wikipedia = Datasets::Wikipedia.new
wikipedia.each do |page|
pages.add(title: page.title,
content: page.revision.text)
end
ruby_pages = pages.select do |record|
record.match("Ruby OR Rails") do |target|
(target.title * 10) | target.content
end
end
p ruby_pages.size
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jekyll-jupyter-notebook
Jekyll
+
Jupyter
Notebook
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Page: 189

Usage
使い方
{% jupyter_notebook sample.ipynb %}
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Red OpenCV
Computer vision
コンピュータービジョン
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Camera （カメラ）
require "cv"
camera = CV::Camera.new
image = camera.read
image.write("capture.jpg")
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Face detect （顔認識）
image_gray = image.convert_color(:bgr2gray)
classifier = # Face detector
CV::CascadeClassifier.new("frontalface_alt")
objects = classifier.detect(image_gray)
color = CV::Color.new(0, 0, 255)
objects.each do |object|
# Draw detected area
image.draw_rectangle(object, color)
end
image.write("detect.jpg")
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Red OpenCV - Impl.
実装
✓ Based on Ruby/GI
Ruby/GIを使っている
✓ Auto generated bindings
バインディングを自動生成
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Ad: RubyData Workshop
✓ 2018-06-01 15:50/17:20
✓ Contents: （内容）
✓ Workshop by mrkn
mrknによるワークショップ
✓ Presentations from
Red Data Tools members
Red Data ToolsメンバーによるRed Data Toolsでやって
きたことの紹介
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Process data with Ruby
Rubyでデータ処理
✓ We're working on it
Red Data Toolsは継続して取り組んでいる
✓ Do you want to work with us?
一緒にやりたい人はいる？
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How to join1 （参加方法1）
✓ Join our chat rooms:
チャットルームに参加
✓ en: Gitter:red-data-tools/en
✓ ja: Gitter:red-data-tools/ja
✓ Join monthly events at Tokyo
東京での毎月の開発イベントに参加
✓ https://speee.connpass.com/
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How to join2 （参加方法2）
✓ Hire developers to work on it
仕事として開発する開発者を雇う
✓ e.g.: mrkn by Speee, Inc.
例：Speeeの村田さん
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How to join3 （参加方法3）
✓ Order ClearCode to work on it
クリアコードに開発の仕事を発注
✓ Join ClearCode to work on it
クリアコードに入って仕事として開発を進める
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Wrap up
まとめ
✓ I'm working on the following
as a Rubyist
Rubyistとしての私の活動
✓ Increase what Ruby can do
with free software
フリーソフトウェアを使ってRubyでできることを増やす
✓ Maintain libraries
ライブラリーのメンテナス
✓ Do you want to work with me?
一緒にやりたい人はいる？
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