Taking something that can't be done, and then doing it.

by Jiří {x2} Činčura

Latest Entries

The magic of "async" keyword

In last couple of weeks I was again confronted number of times with something “asynchronous”. In this post I don’t really don’t want to argue about CPU-bound and IO-bound operations with respect to “asynchronous” word. What I’ll talk about is the async keyword. Because it looks like there’s still confusion.

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Set-reset easily

I have to say I’m bit obsessed by writing as less code as possible and having compiler of language do the work. I don’t like cryptic code, though. It needs to read easily. My problem today was simple. I needed simplify the code that sets new value into property, does something and sets back the original value.

Maybe you remember this from good old Delphi or WinForms days. Set the title of button to “Working…”, do the work, put back whatever was on that button before.

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Timing out task

Last week I was working with pretty bad library that from time to time got stuck. No progress. Given the library was fairly young and supported asynchronous methods I suspect there was a deadlock/livelock somewhere. Although the code was open source I had no time (or intention) to debug it. I just needed quick fix.

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WUG: Asynchronní a paralelní programování v .NETu (Olomouc)

Po Brně a Praze si “Asynchronní a paralelní programování v .NETu” střihneme v Olomouci. Jsem rád, že lidi toto zajímá. Je to téma co mě baví a rád o něm povídám. Klidně bych povídal a programoval a přemýšlel nad problémy co lidé přinesou hodiny. A když mě někdo poslouchá… :)

Asynchronní proramování nabralo za posledních pár let na obrátkách a dostalo se do povědomí mnoha vývojářů. Ačkoli ve své podstatě se nejedná o nic nového, alespoň v systému Windows. Nicméně příchod C# 5 a, jistě nyní známých, klíčových slov async a await umožnil použití asynchronní programování bez dřiny.

Pokud vás zajímají detaily od křemíku až po kód, přijďte 13.10.2014 od 17:30 na WUG do Olomouce.

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Kreuzspitze FKT

Two years ago I first hiked the Kreuzspitze. The Kreuzspitze in Ötztal Alps – kreu means cross in German and spitze could be translated as peak and as there’s a lot of peaks in (not only) Alps with cross on top, it’s also bunch of peaks with same name in Austria, Italy, Germany and maybe somewhere else. The trail from closest village Vent is not extra difficult (you don’t need to climb) although it’s steep in some sections and the final part being a bit exposed ridge. Later I discovered the concept of FKTs or Fastest Known Times and after a while it clicked me. This could be a great peak to try to summit (and get back down) in record time.

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On sprints

Everybody’s agile. Everybody’s having backlog and doing scrum (whatever that means). Everybody’s talking about one week sprints and two week sprints. And it’s so fun and modern and minimum viable product and burn down charts and … and I’m not so sure about sprints.

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Checking for ConfigureAwait(false) automatically

Task Parallel Library (TPL) and async/await functionality completely changes the game we - developers - were playing last years. Because it changes the game so much there’s quite some implementation details that, when you want to play A game, need to be considered. It’s not that the implementation is wrong or attacking the problem from wrong direction. It’s just a trade-off. Basically to make a A- game ready without any additional learning.

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TcpListener and TcpClient (an easy-to-use example) - part 2

Back in 2005 I wrote a blogpost TcpListener and TcpClient (an easy-to-use example). It was really just a piece of code I wrote to quickly finish what I was doing and I put it on my blog. The code was throwaway code, but even after the years it’s still visited a lot on my blog.

Given the code was written 9 years ago, when my skills were 9 years younger and when the world around us was slightly different, different tools etc. I decided to give it a little facelift. Kind of 2014 edition.

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Updating manually firmware in Garmin fēnix 2

Last week I noticed new firmware for Garmin fēnix 2 being available. I was eager to load it into watch because I was having problems lately with satellite reception. I was not happy to open Garmin Express to update the firmware. The watch works as a standard USB Mass Storage so why the vendor forces me to use this program is a mystery.

Anyway as I started the Garmin Express it started updating itself and kept popping up the UAC prompts. After like twenty confirmations it finally started, but said there’s no Garmin device connected. Heck it was, I just copied the fit files from it, it was charging and I saw the “Garmin drive”. Couple of attempts later I gave up. Time to look how the update it done - I had strong feeling that it’s just copying the file somewhere and that’s it.

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Deleting entity in Entity Framework only by key without fetching it

I was showing today on my Entity Framework course some tips and one of them was how to delete entity when you only have a key without fetching it first. Kind of small optimization. And then my brain started to think whether I can do it completely dynamically – just having the type of entity and values of key properties.

I “knew” I can do it. It was just a question of how deep I’ll have to dig. Surprisingly it’s not that bad.

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WUG: Asynchronní a paralelní programování v .NETu (Praha)

Pro velký úspěch v Brně si zopakujeme Asynchronní a paralelní programování v .NETu pro Prahu. :)

Asynchronní proramování nabralo za posledních pár let na obrátkách a dostalo se do povědomí mnoha vývojářů. Ačkoli ve své podstatě se nejedná o nic nového, alespoň v systému Windows. Nicméně příchod C# 5 a, jistě nyní známých, klíčových slov async a await umožnil použití asynchronní programování bez dřiny.

Pokud vás zajímají detaily od křemíku až po kód, přijďte 3.7.2014 od 17:30 na WUG do Prahy.

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Targeting more frameworks with on csproj

I don’t like doing things twice or more times. And creating builds with csproj for multiple frameworks (like .NET 2.0, .NET 3.5, .NET 4.0, .NET 4.5) isn’t easy. Bunch of projects I’m following has like Project_40.csproj, Project_45.csproj and so on. That means you have to maintain two project files when you add, move or remove files.

Because I don’t like managing multiple project files, when I first started building FirebirdClient for multiple frameworks I simply switched target framework in Visual Studio, switched configuration and did the build. Not exactly a best scenario and actually few times I forgot to do the switch and produced wrong build. I had to double check what I was publishing.

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