ruby - 如何仅从哈希中提取时间项？

Question

我有一个如下所示的哈希:

{"19th Apr, 2013" => :a, "20th Apr, 2013" => :b,"Tomorrow" => :c,"5:00 PM" => :d,"09:25 PM" => :e}

我想要输出:

作为 {"5:00 PM"=> :d,"09:25 PM"=> :e}

谁能帮我解决这个问题？

Answer 1

t = {"19th Apr, 2013" => :a, "20th Apr, 2013" => :b,"Tomorrow" => :c,"5:00 PM" => :d,"09:25 PM" => :e}

t.select { |k,v| Time.strptime(k,"%H:%M %P") rescue false }

#=>  {"5:00 PM"=>:d, "09:25 PM"=>:e}