feat: initial commit

Gemfile

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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# gem "rails"
+
+gem "nokogiri", "~> 1.18"
+gem "http", "~> 5.2"

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
+    domain_name (0.6.20240107)
+    ffi (1.17.2-aarch64-linux-gnu)
+    ffi (1.17.2-aarch64-linux-musl)
+    ffi (1.17.2-arm-linux-gnu)
+    ffi (1.17.2-arm-linux-musl)
+    ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86_64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
+    ffi (1.17.2-x86_64-linux-musl)
+    ffi-compiler (1.3.2)
+      ffi (>= 1.15.5)
+      rake
+    http (5.2.0)
+      addressable (~> 2.8)
+      base64 (~> 0.1)
+      http-cookie (~> 1.0)
+      http-form_data (~> 2.2)
+      llhttp-ffi (~> 0.5.0)
+    http-cookie (1.0.8)
+      domain_name (~> 0.5)
+    http-form_data (2.3.0)
+    llhttp-ffi (0.5.1)
+      ffi-compiler (~> 1.0)
+      rake (~> 13.0)
+    nokogiri (1.18.8-aarch64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.8-aarch64-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.8-arm-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.8-arm-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.8-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.8-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.8-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.8-x86_64-linux-musl)
+      racc (~> 1.4)
+    public_suffix (6.0.2)
+    racc (1.8.1)
+    rake (13.2.1)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  http (~> 5.2)
+  nokogiri (~> 1.18)
+
+BUNDLED WITH
+   2.6.2

LICENSE

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+MIT License
+
+Copyright (c) 2025 sevenc7c
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+---
+dataset_info:
+  - config_name: default
+    features:
+      - name: url
+        dtype: string
+      - name: title
+        dtype: string
+      - name: composer
+        dtype: string
+
+      - name: past_level
+        dtype: int32
+      - name: past_notes
+        dtype: int32
+      - name: past_floors
+        dtype: int32
+      - name: past_longs
+        dtype: int32
+      - name: past_arcs
+        dtype: int32
+      - name: past_skys
+        dtype: int32
+
+      - name: present_level
+        dtype: int32
+      - name: present_notes
+        dtype: int32
+      - name: present_floors
+        dtype: int32
+      - name: present_longs
+        dtype: int32
+      - name: present_arcs
+        dtype: int32
+      - name: present_skys
+        dtype: int32
+
+      - name: future_level
+        dtype: int32
+      - name: future_notes
+        dtype: int32
+      - name: future_floors
+        dtype: int32
+      - name: future_longs
+        dtype: int32
+      - name: future_arcs
+        dtype: int32
+      - name: future_skys
+        dtype: int32
+
+      - name: beyond_level
+        dtype: int32
+      - name: beyond_notes
+        dtype: int32
+      - name: beyond_floors
+        dtype: int32
+      - name: beyond_longs
+        dtype: int32
+      - name: beyond_arcs
+        dtype: int32
+      - name: beyond_skys
+        dtype: int32
+
+      - name: eternal_level
+        dtype: int32
+      - name: eternal_notes
+        dtype: int32
+      - name: eternal_floors
+        dtype: int32
+      - name: eternal_longs
+        dtype: int32
+      - name: eternal_arcs
+        dtype: int32
+      - name: eternal_skys
+        dtype: int32
+---
+
+# Arcaea Num Notes Dataset
+
+[wikiwikiのノート数](https://wikiwiki.jp/arcaea/%E3%83%8E%E3%83%BC%E3%83%84%E6%95%B0%E9%A0%86)をもとにしたデータセット。
+収集コードはmain.rbを参照してください。

main.rb

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+# frozen_string_literal: true
+require "nokogiri"
+require "http"
+require "json"
+
+url = "https://wikiwiki.jp/arcaea/%E3%83%8E%E3%83%BC%E3%83%84%E6%95%B0%E9%A0%86"
+response = HTTP.get(url)
+doc = Nokogiri.HTML(response.body.to_s)
+contents = doc.at_css("div#content").children
+tables =
+  contents
+    .drop_while { |node| !(node.at_css("a[name='n000']")) }
+    .take_while { |node| !node.at_css("a[name='notesbylevel']") }
+
+diff = {
+  "Past" => :past,
+  "Present" => :present,
+  "Future" => :future,
+  "Eternal" => :eternal,
+  "Beyond" => :beyond
+}
+
+def parse_num_notes(num_notes)
+  return 0 if num_notes == "-"
+  num_notes.to_i
+end
+
+songs = Hash.new { |h, k| h[k] = {} }
+tables
+  .flat_map { |t| t.css("tbody tr") }
+  .each do |tr|
+    s_notes, n_song, composer, r_diff, s_lv, s_f, s_l, s_a, s_s = tr.css("td")
+
+    notes = s_notes.text.strip.to_i
+    song = n_song.text.strip
+    song_url = n_song.at_css("a")["href"]
+    composer = composer.text.strip
+    difficulty = diff[r_diff.text.strip]
+    level = s_lv.text.strip.to_i
+    num_floors = parse_num_notes(s_f.text.strip)
+    num_longs = parse_num_notes(s_l.text.strip)
+    num_arcs = parse_num_notes(s_a.text.strip)
+    num_skys = parse_num_notes(s_s.text.strip)
+    songs[song_url][:title] = song
+    songs[song_url][:composer] = composer
+
+    songs[song_url][:"#{difficulty}_level"] = level
+    songs[song_url][:"#{difficulty}_notes"] = notes
+    songs[song_url][:"#{difficulty}_floors"] = num_floors
+    songs[song_url][:"#{difficulty}_longs"] = num_longs
+    songs[song_url][:"#{difficulty}_arcs"] = num_arcs
+    songs[song_url][:"#{difficulty}_skys"] = num_skys
+  end
+
+File.open("songs.jsonl", "w") do |f|
+  songs.each do |url, song|
+    f.puts({ url: "https://wikiwiki.jp" + url }.merge(song).to_json)
+  end
+end