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How to implement a rule engine?
..."Contains", "C#" )
};
// compile the rules once
var compiledRules = rules.Select(r => CompileRule(r)).ToList();
public bool MatchesAllRules(User user)
{
return compiledRules.All(rule => rule(user));
}
Here is the implementation of BuildExpr:
Expression BuildExpr(Rule r, ParameterExpress...
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...s criteria, but if maturity were the only metric, I imagine you would have selected a BLAS or LAPACK based option.
– Catskul
Sep 9 '09 at 17:54
...
Update relationships when saving changes of EF4 POCO objects
...ategories" is an IEnumerable containing the IDs of the categories the user selected in the view.
db.Entry(dataobj).State = EntityState.Modified;
db.SaveChanges();
dataobj = db.ServiceTypes.Include(x => x.Categories).Single(x => x.Id == dataobj.Id);
var it = _categories != null...
How do I determine the size of an object in Python?
... and module Class Tracker provides off-line analysis of the lifetime of
selected Python objects.
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Multiple INSERT statements vs. single INSERT with multiple VALUES
...t
One place where this information is leveraged is shown by @Lieven here
SELECT *
FROM (VALUES ('Lieven1', 1),
('Lieven2', 2),
('Lieven3', 3))Test (name, ID)
ORDER BY name, 1/ (ID - ID)
Because at compile time it can determine that the Name column has no duplicates it...
How do I tell Maven to use the latest version of a dependency?
...n (will always resolve to 1.0.1 unless a collision occurs, when Maven will select a matching version):
<version>1.0.1</version>
Declare a version range for all 1.x (will currently resolve to 1.1.1):
<version>[1.0.0,2.0.0)</version>
Declare an open-ended version range (w...
Perl build, unit testing, code coverage: A complete working example
...ESS_PERL_SWITCHES}. For example: -MDevel::Cover=+ignore,.t$,+inc,/app/lib,-select,MyModule.pm where /app/lib is the application-private library and MyModule.pm is the module under test.
– Michael Carman
Apr 27 '10 at 16:33
...
ServiceStack vs ASP.Net Web API [closed]
...solveService<T>() method which returns an auto-wired instance of the selected service as seen in the Nortwind CustomerDetails Service example:
var ordersService = base.ResolveService<OrdersService>();
var ordersResponse = (OrdersResponse)ordersService.Get(
new Orders { CustomerId = ...
How do you use bcrypt for hashing passwords in PHP?
...pt works internally. And there are a TON of answers about that. Here are a selection that I've written, that I won't copy/paste here, but link to:
Fundamental Difference Between Hashing And Encryption Algorithms - Explaining the terminology and some basic information about them.
About reversing ha...
What does enctype='multipart/form-data' mean?
...do printf '' | nc -l 8000 localhost; done
Open the HTML on your browser, select the files and click on submit and check the terminal.
nc prints the request received.
Tested on: Ubuntu 14.04.3, nc BSD 1.105, Firefox 40.
multipart/form-data
Firefox sent:
POST / HTTP/1.1
[[ Less interesting hea...