invert
http://docs.ruby-lang.org/en/2.0.0/Hash.html
invert → new_hash Returns a new hash created by using hsh's values as keys, and the keys as values. h = { "n" => 100, "m" => 100, "y" => 300, "d" => 200, "a" => 0 } h.invert #=> {0=>"a", 100=>"m", 200=>"d", 300=>"y"}
<td class="recommend"><%= subchannel_item.if_recommend %></td>
RECOMMEND = { '否' => false, '是' => true }
def if_recommend RECOMMEND.invert[recommend] end
[11] pry(main)> SubchannelItem::RECOMMEND => {"否"=>false, "是"=>true} [12] pry(main)> SubchannelItem::RECOMMEND.invert => {false=>"否", true=>"是"} [15] pry(main)> SubchannelItem::RECOMMEND.invert[SubchannelItem.first.recommend] => "是"