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It took me years to figure out what was wrong with writing tests against the implementation.I knew the theory. Focus on the business-specific behavior and write tests before an actual code.But it was hard. I never understood how I could write tests b...
Modeling exceptions is hard. On the surface, it seems easy. Everyone knows what an exception is, right? But when you think deeper about it, there are a lot of traps that you can fall into. Throwing an exception is a goto Exceptions are hidden goto s...
I dig string interpolation in C#. It is concise and easy to use. And even though JetBrains Rider is known for making developers super productive with all kinds of templates and shortcuts, there was one thing I've missed - the ability to surround a v...
It took me a few tries to finally call an HTTP endpoint using F#.I've ended up with this code: let result = async { let client = new HttpClient() let url = "https://api.frankfurter.app/latest?amount=10.99&from=USD&to=PLN" ...
I'm a big proponent of using delegates instead of interfaces as described here. Recently I've found out that it works wonderfully with the partial application! Partial application is a concept widely used in functional programming. It's a function th...
using SAFE Dojo
Regularly I want to await a few tasks and get their result. Surprisingly, there is no obvious way to do that. Task.WhenAll can be helpful, as we see later, but it doesn't solve the problem.My common scenario looks like this: var dbTasks = getDataFrom...
GitLab has built-in support for feature flags. Since I've become a big supporter of this approach, I was happy to see this. GitLab uses Unleash as a feature toggle service. It has a free, open-sourced client for many platforms and can be found on Nu...
I test my code with API calls all the time. Because of this, Rider HTTP Client is a lifesaver.Usually, I call some endpoint for a token and then try to get some data from the service. So let's try to use Rider for this case. First, we have to run the...