Railscast skill (7)

in_groups_of
定量分組時在用的
<br /><!-- tasks/index.rhtml --><br /><table><br /><% @tasks.in_groups_of(4, false) do |row_tasks| %><br /> <tr><br /> <% for task in row_tasks %><br /> <td><%= task.name %></td><br /> <% end %><br /> </tr><br /><% end %><br /></table><br />

group_by Month
group_by 好棒, 想用啥分類就分
# tasks_controller.rb<br />def index<br /> @tasks = Task.find(:all, :order => 'due_at, id', :limit => 50)<br /> @task_months = @tasks.group_by { |t| t.due_at.beginning_of_month }<br />end<br /><br /><br /><!-- tasks/index.rhtml --><br /><% @task_months.sort.each do |month, tasks| %><br /> <h2><%= month.strftime('%B') %></h2><br /> <% for task in tasks %><br /> <div class="task"><br /> <strong><%= task.name %></strong><br /> due on <%= task.due_at.to_date.to_s(:long) %><br /> </div><br /> <% end %><br /><% end %><br />