Hello.
Today I’ve stubled upon an interesting article at CodeProject:
Karmencita: an object query language for .NET
http://www.codeproject.com/csharp/Karmencita.asp
The do something like
// initialize the data source
// (in this case a Stack of Customers)
Stack customers = …
// initialize Karmencita with
// the type of object to be queries
ObjectQuery oq =
new ObjectQuery();
// write the query
string query = “Name = [Thor the Mighty]” +
" and IsMale = true and BirthDate" +
" < [1,1,1910]";
//run the query
Customer[] processes = (Customer[]) oq.Select(customers, query);
I have no idea about when and how can be it useful, but it can be
intersting
to do the trick for Ruby, ha?
Victor.
Victor S. 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 customers = …
customers = …
// initialize Karmencita with
// the type of object to be queries
ObjectQuery oq =
new ObjectQuery();
// 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!
Cheers,
Dave
oq = proc {|cust| cust.name == “Thor the Mighty” &&
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?
Victor.
Victor S. wrote:
// initialize Karmencita with
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
On Mar 25, 2006, at 4:08 AM, Robert K. wrote:
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).
I so agree. When I first came to Ruby, blocks were probably my
biggest stumbling block. I got them down just enough not to think
they were weird every time I used one, but then didn’t pay much
attention to them. Much later, when I wanted to move down the path
of enlightenment, I found myself back at blocks. I really believe
they are the key to great Ruby.
James Edward G. II