Json.net also tricked me

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Recently, I was tricked by Roslyn, today by Json.NET. My bloody luck ;) Let's look at the following two very simple classes. Class A has one readonly property and I had to define a special constructor to allow Json.NET to set this property. B is also simple. It has one property, this time of type A with some default value.

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Roslyn tricked me again

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A while ago 2 of my SpecFlow tests started failing on the build server. At the same time, on a few local machines no problems were observed. I also didn't find any exceptions in the log, so I decided to log into the server and debug a problem there.

Quite soon I figured out that the problem is in the algorithm that uses Roslyn to analyse and understand the code. Here is a simplified code that finds all local variables within a method body and tries to determine their exact types.

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Report from the battlefield #11 - premature optimization is the root of all evil?

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Have you ever heard that "premature optimization is the root of all evil"? Probably yes. It's quite well known Donald Knuth's phrase. However, the whole cite is much less known:

"We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%."

Why Am I writing about that? Because recently I had on occasion to fix an application which was written according to the fist part of this cite. Or even worse it was written according to the rule "any optimization is the root of all evil". Here are some examples what not to do and some tips what to do.

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.NET Developer Days 2017

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In the post .NET Developer Days 2016 - Grand finale I wrote that it hadn't been my last my last .NET Developer Days conference. Recently, I've been asked again to become a media partner of this year's edition so I agreed without much hesitation. Disclaimer: It also means that it is a sponsored text.

The well known aphorism says that perfect is the enemy of good. The organizers of the conference must have heard that because the form of the current edition will be similar to the previous one i.e.:

• What: 3 tracks with session about different topics and of different difficulties.
• Where: EXPO XXI Exhibition Center – Warsaw, Prądzyńskiego 12/14
• When: 18th-20th October 2017. 18th October is reserved for full-day training sessions (so called pre-conf) and the actual conference will start on 19th October.
• Language: 100% English

The agenda has not been published yet and we have to wait until June. However, the last time the range of topics was wide and I didn't have any problem to find something interesting from my perspective. I keep my fingers crossed this year will not be worse. What is very important the earlier you buy tickets the less you will pay. If you are interested do not think too much. The current price for the conference without pre-conf is 275€. In June 325€ it will be and in August 375€.

The best and the worst thing when doing science

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A few months ago, I returned (partially) to the university. I'm working in the project in the field of the computer vision for Google company. The project is related to Google Tango technology and is really interesting. However, within these few months there were also moments when I was really fed up. The same happened when I was doing Ph.D. so I started thinking what I like the most in doing science and what I don't like.

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