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class_names = %w[Some Klass Name] class_names.each do |name| self.class.const_set name, Class.new {|k| attr_accessor :attr def initialize @attr = :attr end } end class_names.each do |klass| p self.class.const_get(klass).new end

require 'logger' require 'active_record' # テーブル定義 class CreateShelves < ActiveRecord::Migration def change create_table :shelves end end class CreateBooks < ActiveRecord::Migration def change create_table :books do |t| t.integer :shelf_id end end end # モデル定義 class Shelf < ActiveRecord::Base has_many :books end class Book < ActiveRecord::Base belongs_to :shelf end # ActiveRecordのセットアップ logger = Log

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require 'logger' class Logger class FreeFormatter < Formatter Format = "%{label}, [%{time}#%{pid}] %<severity>5s -- %{progname}: %{message}\n" attr_accessor :format def initialize(format=self.class::Format) @format = format || Format super() end def call(severity, time, progname, msg) @format % { :label => severity[0..0], :time => format_datetime(time), :pid => $$, :severity => severity, :progname

Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?

Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?

Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?

このエントリーはGitアドベントカレンダーの九日目です。 昨日はaerealさんの「内容が空のファイルをインデックスに追加する」でした。git-addの-Nオプション、知らなかったんですが使えそう。 新規ファイルに暫く書き込んだ後で「あ、git-addしなくちゃ」って思うことが多いんです。そういう時に取り敢えず登録だけして、後で差分を見ながら他のファイルとまとめて整理してコミットできるようになる、というのは地味（失礼！）だけど強い。 さて、今日の話題は「ファイル変更を監視するプログラム」です。 例えばSCSSを使っている時、開発中はscss --watchやcompass watchでSCSSファイルを監視しながら作業していると思います（Rails以外はね）。ファイルを変更したらそれを検知して、コンパイルして、CSSを上書きしてくれる。 ところがGitでは、git-checkoutでブラン