From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2011-04-29T02:19:19+09:00
Subject: Re: Initialize Struct from Hash

On Thu, Apr 28, 2011 at 7:16 PM, 7stud -- <bbxx789_05ss@yahoo.com> wrote:
> "Jesús Gabriel y Galán" <jgabrielygalan@gmail.com> wrote in post
> #995567:
>> On Thu, Apr 28, 2011 at 7:00 PM, Brian Candler <b.candler@pobox.com>
>> wrote:
>>>  self
>>> (I'm talking about real Struct here, not OpenStruct etc)
>> ruby-1.8.7-p334 :001 > K = Struct.new :id,:timestamp
>>  => K
>> ruby-1.8.7-p334 :002 > K[3,8]
>>  => #<struct K id=3, timestamp=8>
>>
>> Jesus.
>
> Is there a hash anywhere in your code? How about this:

Yep, I know. How about this?

ruby-1.8.7-p334 :014 > h = {:id => 3, :timestamp => 6}
 => {:timestamp=>6, :id=>3}
ruby-1.8.7-p334 :043 > K = Struct.new :id, :timestamp do
ruby-1.8.7-p334 :044 >     def self.from_hash h
ruby-1.8.7-p334 :045?>     self[*h.values_at(*K.members.map {|m| m.to_sym})]
ruby-1.8.7-p334 :046?>     end
ruby-1.8.7-p334 :047?>   end
 => K
ruby-1.8.7-p334 :048 > K.from_hash h
 => #<struct K id=3, timestamp=6>

Jesus.