From: Robert Klemme <bob.news@...>
Date: 2006-03-25T19:08:53+09:00
Subject: Re: [QUIZ] Object Query Language for Ruby?

Victor Shepelev wrote:
>> Victor Shepelev wrote:
>>> Today I've stubled upon an interesting article at CodeProject:
>>>
>>> Karmencita: an object query language for .NET
>>> ...
>>> // initialize the data source
>>> // (in this case a Stack of Customers)
>>> Stack<Customer> customers = .....
>> customers = ...
>>
>>> // initialize Karmencita with
>>> // the type of object to be queries
>>> ObjectQuery<Customer> oq =
>>>          new ObjectQuery<Customer>();
>>>
>>> // write the query
>>> string query = "Name = [Thor the Mighty]" +
>>>               " and IsMale = true and BirthDate" +
>>>               " < [1,1,1910]";
>> oq = proc {|cust| cust.name == "Thor the Mighty" &&
>>                   cust.male? && cust.birth_date < Date.new(1910) }
>>
>>> //run the query
>>> Customer[] processes = (Customer[]) oq.Select(customers, query);
>> processes = customers.select(&oq)
>>
>>> I have no idea about when and how can be it useful, but it can be
>>> intersting
>>> to do the trick for Ruby, ha?
>> It's already there!
>>
> 
> Hmmm... Really :) I'm not an idiot, usually. 
> 
> I must say, Ruby solution seems to be much prettier and "in a spirit of a
> languages", yes?

The longer I use Ruby the more apparent it seems to me that lambdas / 
procs / blocks are one of the core features - if not *the* core feature 
- that set it apart from P* languages and make these things so easy and 
well looking (= easy to read and understand).

Kind regards

	robert