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After earlier explaining how to compute disorder and split data in his exploration of machine learning decision tree classifiers, resident data scientist Dr. James McCaffrey of Microsoft Research now shows how to use the splitting and disorder code to create a working decision tree classifier.
01/22/2020
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Using a decision tree classifier from a machine learning library is often awkward because it usually must be customized and library decision trees have many complex supporting functions, says resident data scientist Dr. James McCaffrey, so when he needs a decision tree classifier, he always creates one from scratch. Here's how.
01/21/2020
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If you're creating business services that send dates and decimal data then you may be concerned that gRPC services don't support the relevant data types. Don't Panic! There are solutions. Here's how to use them.
01/17/2020
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In the real world, you've been dealing with the State pattern every time you designed a set of database tables. The Protocol Buffers specification lets you do the same thing when you define the messages you send and receive from your gRPC Web Service.
01/14/2020
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Here's everything you need to know to create a standard set of reusable message formats to use with your gRPC services.
01/10/2020
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Peter's pretty fanatical about replacing documentation/comments with readable code. So he's very excited about using enums when defining gRPC services. Very. Excited. But there are some best practices and "things to be aware of" when using this feature.
01/08/2020
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Dr. James McCaffrey of Microsoft Research uses code samples and screen shots to explain perceptron classification, a machine learning technique that can be used for predicting if a person is male or female based on numeric predictors such as age, height, weight, and so on. It's mostly useful to provide a baseline result for comparison with more powerful ML techniques such as logistic regression and k-nearest neighbors.
01/07/2020
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Defining your gRPC service using the Protocol Buffers specification is pretty easy. There are just a couple of things to be aware of as you convert from the specification to .NET Core and then manage your service's evolution.
01/06/2020
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If all you're doing with acceptance criteria when writing user stories is listing off tests then you're missing some opportunities to improve the quality of your user stories.
11/15/2019
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Here's a tool that Peter uses when doing end-to-end testing of authorization in ASP.NET Core applications, with a Blazor example.
11/14/2019
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Dr. James McCaffrey of Microsoft Research uses a full code sample and screenshots to demonstrate how to create a naive Bayes classification system when the predictor values are numeric, using the C# language without any special code libraries.
11/12/2019
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It might make for some "magical" looking code but you can call static methods from any class without having to use the class name.
11/08/2019
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Here's a hands-on tutorial from bona-fide data scientist Dr. James McCaffrey of Microsoft Research to get you up to speed with machine learning development using C#, complete with code listings and graphics.
11/07/2019
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When you need to integrate authorizing the user to perform some activity (or just want to retrieve information about the current user), you need to work with the ClaimsPrincipal’s Claims objects. Here’s everything you might want to do.
11/07/2019
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When you need to integrate authorization with procedural code, you're going to need your application's ClaimsPrincipal object so that you can check the user's authorization claims. Here's both how to get to the ClaimsPrincipal and how to extend it with custom claims.
11/01/2019
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You don't have to live with the columns in the Error Window ... or any other tool window in Visual Studio. Plus: if you're not happy with the Window's Sort order, you can change that, too.
10/30/2019
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While security in ASP.NET Core is wholly claims based, you can still use the Authorize attribute to control access to your application. You just need to set up the right policies to work with the claims associated with the current user.
10/29/2019
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When it comes to controlling which users can access which functionality in a Blazor application you not only have access to all of the user’s authentication you can authorize the user’s actions without writing any code.
10/28/2019
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Eric Vogel follows up on his previous post on getting started with ASP.NET Core security. Now that .NET Core 3.0 is out, he shows how to upgrade the code from Part 1 to ASP.NET Core 3.0, put pages behind login, create user roles, and use existing roles to restrict access to pages.
10/24/2019
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You have a responsibility to your organization to reject bad data, otherwise bad things will happen. When it comes to creating Web services, your first line of defense is the ApiController attribute.
10/22/2019
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Code snippets don’t just have to be inserted into your code -- they can also be used to wrap some structure around your code.
10/21/2019
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Microsoft Research's Dr. James McCaffrey show how to perform binary classification with logistic regression using the Microsoft ML.NET code library. The goal of binary classification is to predict a value that can be one of just two discrete possibilities, for example, predicting if a person is male or female
10/18/2019
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There are two ways to call an async method. The way you choose to call the method depends on what you want from it.
10/17/2019
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If you're upgrading an ASP.NET Version 2.n website to the newly released Version 3.0, some changes are easy. At least one is going to be annoying.
10/14/2019
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Once you've got a contract that describes a gRPC service, creating the service itself and a client that can call the service is easy. In fact, Visual Studio will do most of the work for you ... once you've got your projects set up correctly, that is.
10/11/2019