Podczas przygotowywania prezentacji na var Sovia = new Tech(); natrafiliśmy na problem który dawał nam miejsce do pastwienia się nad dotnetem i z którego ja bardzo chciałem skorzystać ;) Dobrze, że tego nie zrobiliśmy. Po raz kolejny wyszła na jaw pewna prawda i jeden z podstawowych sposobów analizowania i debugowania aplikacji. Zapraszam do lektury

Engineers love the new tools – that’s a fact. New IDE release is kind of Christmast Eve for all developers of a platform. Releasing Visual Studio 2017 is not an exception! It has tens of cool features which are widely described all over the Internet. The problem is, that those tutorials and reviews are all in English and my Visual Studio installed in… a default language of my system – Polish. I can’t get so deep into a idea of translating IDE...

Reading time ~6 minutes In most cases .NET manages to solve the DLL hell problem pretty well, but sometimes it all falls apart, and when it does in best case scenario we see something like this:Could not load file or assembly 'XXXX, Version=X.Y.Z.W, Culture=neutral, PublicKeyToken=eb42632606e9261f' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) The much worst case is this:The method 'XXXX' was not fou...

Hi there! I’ve just had to sort some list alphabetically with specific values on top. Here is one of the possible solution. Worth to know:OrderBy sorts items in ascending order [a, b, c, d] [1,2,3,4]Can be use with boolean functionFalse = 0True = 1 So if we use: list.OrderBy(item => item == "Cat"); Item that equals „Cat” will be placed as last element, because as the only element returns true(1) as a result + as it was mention before OrderBy s...

I often work on applications whose sole task is to execute a script at certain time or day. You may approach it in several ways, eg.: Task Scheduler (Windows), SQL Job (if it is a SQL task) or CRON in Linux. You may also write application, which would run in background and execute a script at certain time. The only question is – do you really want do it? In this post, I would like to introduce other solution to tasks like this. ...

Reading time ~5 minutes In my ongoing series on calculating similarities one angle always seemed worth trying, and was pointed out many times on Reddit - use C++ and matrix manipulations. Similarity calculation fits very nicely into matrix representation, and there are algorithms targeting sparse matrix manipulation. So why did I delay it for so long? Because I had other angles I wanted to try and, from the looks of it required significant changes in the existing code base. But since last op...

Reading time ~2 minutes This post was inspired by a discussion on Reddit that followed my previous post In this post, I will cover a suggestion by BelowAverageITGuy that cut down the total execution time by almost one hour. Saga Before I go further here are some link to the previous posts on the problem of calculating similarities and then optimizing it grew to few post. Here are all of them:How I calculate similarities in cookit?How to calculate 17 billion similaritiesIndependent code in ...

Reading time ~6 minutes Last time I’ve shown how I’ve gone from 34 hours to 11. This time we go faster. To go faster I have to do less. The current implementation of Similarity iterates over one vector and checks if that ingredient exists in the second one. Since those vectors are sparse the chance of a miss is big. This means that I am losing computational power on iterating and calling TryGetValue. How to iterate only over the mutually owned ones and do it fast? Saga Before I go furth...

Reading time ~5 minutes Warning this post contains some math. Even more, it shows how to use it for solving real life problems. This post describes how I calculate similarity between recipes in my pet project cookit.pl. For those of you that don’t know, cookit is a search engine for recipes. It crawls websites extracting recipe texts, then it parses it and tries to create a precise ingredient list with amounts and units. 182 184 recipes2936 ingredients This scale may not seem huge, but tr...

Nowa seria: Tajemnice CLR. Dziś na tapetę biorę to jak działa metoda GetType() czyli skąd obiekt wie jakiego jest typu.