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Resident data scientist Dr. James McCaffrey of Microsoft Research turns his attention to evolutionary optimization, using a full code download, screenshots and graphics to explain this machine learning technique used to train many types of models by modeling the biological processes of natural selection, evolution, and mutation.
02/21/2020
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Eric Vogel uses code samples and screenshots to demonstrate how to do Entity Framework Core migrations in a .NET Core application through the command line and in code.
02/18/2020
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Dr. James McCaffrey of Microsoft Research uses a full code program, examples and graphics to explain multi-class logistic regression, an extension technique that allows you to predict a class that can be one of three or more possible values, such as predicting the political leaning of a person (conservative, moderate, liberal) based on age, sex, annual income and so on.
02/11/2020
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I found a new use for Visual Studio Code, the little code editor that could: substituting for a vital work app when your PC dies and a replacement won't be shipped to your remote office for weeks.
02/04/2020
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A Red Hat developer has created the Didact project, a Visual Studio Code extension that puts the code editor to work as a tutorial guide and also showcases other things it can do via a combination of technologies.
01/31/2020
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GraphQL lets you create data access services without writing controllers. Instead of writing procedural code, you declare schemas describing what queries you'll accept and what you're willing to return. Here's how to get started in ASP.NET Core.
01/29/2020
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ASP.NET Core Version 3.1 adds some new features for managing events in Blazor. You may think you'll never need them, but there may be a time when you'll be glad to know about at least one of them.
01/27/2020
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ASP.NET Core Version 3.1 has at least two major changes that you'll want to take advantage of. Well, Peter thinks you will. Depending on your background, your response to one of them may be a resounding “meh.”
01/23/2020
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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