SQL Server Bootcamp 2021
Na letošní SQL Server Bootcamp, který se koná online, jsem připravil přednášku na téma Co nás čeká v Entity Framework Core 6.
Azure Community Conference 2021
I’ll be speaking at Azure Community Conference 2021 that is going to happen in about 2 weeks. It’s online, so you can easily attend.
Operators with different color in Visual Studio
When writing some code day or two ago I noticed one operator color in Visual Studio being different color than it usually is. I initially thought it’s a fluke in syntax highlighting that will eventually go away. When it didn’t, I decided to investigate.
.NET DeveloperDays 2021
It’s again that time of the year when my favorite conference is about to happen. Yep, it’s .NET DeveloperDays time (and planned as in-person, yay!). You still have about a month to register and you should. I’ll have both the workshop and two sessions in main conference.
WUG: Co nás čeká v .NET 6 a C# 10 (Zlín)
WUG ve 3D! Zlín se to rozhodl odstartovat a zkusíme se sejít IRL. A jak lépe to odstartovat, než se podívat na to co už za chvíli budeme mít na stole – .NET 6 a C# 10. Rozjedeme to 14.10.2021 od 17:30.
Dotnetos Conference 2021
I’ll be speaking at Dotnetos Conference 2021 October 4th – 6th.
Going deeper into static constructors hole
Yesterday’s exploration led to another eye-opening moment. This goes even deeper. As you maybe know, dependencies are shared between AssemblyLoadContexts. This can lead to subtle changes of behavior depending on what’s loaded where.
C# static constructor called multiple times
Few days ago, I had a behavior I couldn’t believe. Static constructor of my C# class was clearly called two times. For no reason! Even the static variable it was initializing was null during second call. How is that even possible?
Using FbNetExternalEngine with Firebird Embedded (in .NET)
Firebird Embedded is a great edition of Firebird (you can read more about it here) and if you put FbNetExternalEngine into the mix, it becomes crazy powerful tool. But to put it into the mix, one needs to carefully follow few steps to succeed.
ADO.NET provider 8.5.0.0 for Firebird is ready
New version 8.5.0.0 of ADO.NET provider for Firebird is ready for download. This release contains, among other small improvements and fixes, support for Srp256 (and quite a few related changes, like support for SPB version 3) and fix for performance regression for synchronous code paths introduced in 8.0.0.0.
Live: Case insensitive replace in Firebird
I’m planning to do next livestream 18 August from 18:00 CEST. The topic is Case insensitive replace in Firebird.
Surprising cost of synchronous fast-paths in asynchronous methods
I’m doing some performance related work in async space, and I was surprised by the slowness of synchronous code-paths in the asynchronous methods. Let’s look at some code.
Live: How to start with FbNetExternalEngine
After a lot of live and pre-recorded conference talks, I decided to try also livestreaming myself. Being a beginner, I forgot to properly announce it beforehand and hence although still livestream, for most people it will be a recording. I’ll get better next time.
WeAreDevelopers World Congress 2021
I’ll be speaking at WeAreDevelopers World Congress 2021 in two weeks (June 28th – July 1st). The speaker line-up there is amazing and I’ll contribute with one session of mine.
Developer Week ’21
Developer Week ’21, a new conference for me, is happening from 28 June to 2 July and I’m lucky to be speaking there, although only via the power of the Internet. I’ll have two sessions.
Introducing FirebirdMonitorTool – tool for processing Firebird’s trace output
Last few weeks, on and off, I was reviving, finishing and improving a library, or now a tool if you will, that allows processing of trace output from Firebird. The library started its life probably sometime around 2014, and after a minimal working piece was done, it was briefly, yet successfully, used. Then it was left rusting up until last few weeks. What can it do?
Controlling my Sinclair AC using .NET and C# (from Raspberry Pi)
As I speculated in my previous post, I eventually decided to try the Wi-Fi option first, because I can try that right here and right now.
Gopas TechEd 2021 (online)
Už za pár týdnů se bude konat Gopas TechEd, tento rok také online. Já jsem připravil dvě přednášky. Obě plné kódu.
I replaced jQuery on this blog with vanilla JavaScript
Over maybe last two years or so, I’ve been reading with interest primarily @alesroubicek’s tweets, where he disregarded (with good arguments) all the all-encompassing JavaScript frameworks and libraries. And then out of nowhere last week, I decided to try to remove jQuery from this blog. Simply to have a personal experience with doing stuff in vanilla JavaScript.
ADO.NET provider 8.0.1.0 for Firebird is ready
New version 8.0.1.0 of ADO.NET provider for Firebird is ready for download. This a small fix for a – sadly critical – bug that slipped through the 8.0.0 release. I recommend updating immediately.
My new AC has built-in Wi-Fi and that brings dilemma into my home automation hacking
Last week I had AC installed into my house and the unit has Wi-Fi module as a standard option. That brings dilemma to my inner geekiness. As you might expect from me, I want to control the unit remotely my own way. Would the unit have only infrared remote control I would take some ESP8266 board (Wemos D1 Mini Pro is my favorite) and hack together my own infrared remote with simple API over the Wi-Fi. Because that would be the only way. But now I have two options. Oh my.
ADO.NET provider 8.0.0.0 for Firebird is ready (with Entity Framework Core 5.0 support)
New version 8.0.0.0 of ADO.NET provider for Firebird is ready for download. This release is a big one. Huge.
Fusing await using and await foreach and await
As I’m thinking about the await using and various usage patterns, my mind sometimes starts to wander into pieces like Task<IAsyncDisposable>, Task<IAsyncEnumerable<T>> and Task<IAsyncEnumerable<IAsyncDisposable>>. And how to wrap that into await using and await foreach making some confusing combinations. This is what I was playing with, don’t expect anything specific.
ConfigureAwaitChecker with support for “await using” and “await foreach”
It’s probably bit overdue, but I finally implemented checking for ConfigureAwait(false) in my ConfigureAwaitChecker for await using and await foreach. Why now? I simply (finally) needed it. So, what’s new?
Migrated from Disqus to utteranc.es
In last 24 hours I migrated from Disqus to utteranc.es because I’m done with Disqus. I didn’t mind it initially, but last few years I was more and more unhappy about it. Here’s why and how I migrated.
Unexpected finding about “await using var”
I’m now updating my ConfigureAwaitChecker to handle await using and await foreach (release soon, if you’d like to ask) and when trying to handle await using var I was surprised how the compiler interprets that.
WUG: (Ne)Známé vlastnosti Azure Storage (online)
Azure Storage je tak nějak moje oblíbená služba. A za ty roky co existuje jsem nasbíral a taky náhodou objevil hromadu zajimavých vlastností, o kterých možná nevíte nebo nevíte jak je použít. No a tak se na ně podíváme na WUGu 18.3.2021 od 17:00.
WUG: Monitoring (výkonu) aplikace pomocí Event Counterů v .NET (Core) (online)
Máme tu rok 2021 a vypadá to, že se bez in-person akcí budeme muset ještě chvíli obejít. Aby se nám to lépe přečkalo pojďme se společně podívat na funkcionalitu “event counterů” v .NET/.NET Core na WUGu 21.1.2021 od 17:30.
Home automation is heavily stateful and that sucks
In programming we like stateless pieces of code, immutable data structures, functional composition, etc. and we value languages, libraries and environments designed with this in mind. Home automation is complete opposite.
My new PC (and why I chose the components I chose)
During December I finished building my new PC. My previous PC was not terribly dated or slow (and continues to be used by my wife), but I felt it’s favorable time for update. It’s not balls to wall build, rather something I think is good for my workflow – mostly development and related tasks. I don’t edit movies, stream (or play for that matter) games, etc. I describe each component (in no particular order) and my reasoning why I chose it, your mileage may obviously vary.
ADO.NET provider 7.10.1.0 for Firebird is ready
New version 7.10.1.0 of ADO.NET provider for Firebird is ready for download. This a small fix for a bug that slipped through the 7.10.0 release.
ADO.NET provider 7.10.0.0 for Firebird is ready
New version 7.10.0.0 of ADO.NET provider for Firebird is ready for download. This release brings support for new datatypes in Firebird 4 and various improvements across the codebase.
.NET Developer Conference: Tasks and async/await from the ground up
Next week the .NET Developer Conference is happening. As an online event obviously. And I’ll deliver half-day workshop there. The topic is Tasks and async/await from the ground up.
Back to C# basics: Difference between "=>" and "{ get; } =" for properties
I recently realized, the difference between => and { get; } = for properties might not be as known as everybody thinks, based on code I saw multiple times.
DevDay 2020: Using Roslyn to improve your codebase
I have to say, Belgium has a special place in my heart, so when my session for DevDay.be was accepted, I was happy. I would be happier if the conference would be in-person, but 2020 is what it is. Anyway. I’ll be talking about Using Roslyn to improve your codebase. Basically taking advantage of Roslyn’s open design where you can use various pieces of the whole compiler platform and create your own tools with the full power of “compiler” i.e. sematic analysis.
New Environment.ProcessId in .NET 5
While reading some code in .NET runtime, I found Environment.ProcessId property, which surprised me a bit, because I had no idea it existed. Quick look into the documentation and no wonder I had no idea. It’s new in .NET 5.
How Entity Framework Core’s query cache works
Last week, when speaking at .NET Developer Days, I got a question about the query cache in Entity Framework Core – is it shared across DbContexts or is it per instance? With this question I realized I know how the cache work(ed) in Entity Framework 6, but I’m not entirely sure how it’s done in Entity Framework Core. Time to explore! And you can go with me.
WUG Days 2020
Už zanedlouho tu bude další ročník WUG Days (21.-23.10.). Tentokrát jak jinak než online a stále zdarma. Pro mě trochu brutálnější, protože bylo vybráno celkem 5 mých přednášek.
DotFest 2020: Using Roslyn to improve your codebase
The DotFest conference, part of HardFest conferences, is going to happen 16-17 October online (which is little bit sad, because I’d like to visit Novosibirsk, from where the conference will be streamed) and I’ll be talking about Using Roslyn to improve your codebase. Basically taking advantage of Roslyn’s open design where you can use various pieces of the whole compiler platform and create your own tools with the full power of “compiler” i.e. sematic analysis.
Svitla Smart Talk: Most Common Mistakes in Using Tasks and in Asynchronous Code
I’ll be talking about Most Common Mistakes in Using Tasks and in Asynchronous Code as part of Svitla Smart Talk event. It will be streamed 22 September, 19:00 (Kyiv time/UTC+3) and it’s free. There’s a generous 30 minute window for Q&A at the end and I’ll try to asnwer as much questions as possible. You can register here. Hope to see you there.
.NET DeveloperDays 2020
I’m so looking forward to this year’s .NET Developer Days. I think it’s my favorite conference of the year. The current state of the world is not best for conferences, but I hope the #netdd is going to happen at least as planned now. And although the conference is now also online, if the situation permits, I’ll try to be there in-person.
Running ASP.NET Core app on Azure B1ls VM (penny pinching)
Although I usually try to avoid IaaS services as much as possible, for this side project I needed to expose Kestrel webserver directly and hence the obvious choice for hosting web app – the App Service – wasn’t an option. So I went for a VM. And given it’s a side project, I also wanted to run it cheaply. And why not to try to go all out with B1ls VM using Linux.
Projekt “Průvodce vývojářů”
Zhruba poslední rok v mé hlavě krystalizoval nápad. Nápad vznikl na dvou pilířích. První je opakující se potřeba firem, kterou jsem potkával na různých konzultacích a školeních, na něco v podobě out-of-company (nebo možná out-of-box) review, konzultace, nápady nebo prostě jen nějaká forma možnost si s někým promluvit a ujasnit si problém nebo řešení. Druhý pilíř je kontinuální, po částech dávkované, vzdělávání a udržování teamu up-to-date.
Výsledkem je projekt Průvodce vývojářů. A abych tady neopisoval to, co už jsem jednou sepsal, můžete si všechny detaily přečíst na PruvodceVyvojaru.cz.
SQL Server Bootcamp 2020
Na letošním SQL Server Bootcampu, který se koná online, se budete moci dozvědět něco o databázových enginech Firebird a Microsoft SQL Serveru v přednášce “Porovnání Firebird a Microsoft SQL Serveru”, kterou jsem připravil společně Vladimírem Mužným.
Best way to create an empty collection (array and list) in C# (.NET)
I one of APIs I was working a while back I needed to return an empty collection. It was not a performance critical code, yet I decided what would be the best way to do it. Exploring and learning.
True and False functions as “oneliners”
I was reading Stephen Cleary’s A New Pattern for Exception Logging blogpost and the True and False methods caught my eye and I wanted to write them as “oneliners”.
Exploring top-level statements in C# 9
I wanted to know how is the top-level statements feature in C# 9 handled and what’s actually produced. Although I originally planned to do just a quick test and the look at the IL, I kept testing the feature more and more.
🔥 “tabs over spaces” buff
Almost exactly a year ago I was sitting in a restaurant after Update Days: Corestart 3.0 conference with my ↹ over ␣ ␣ ␣ shirt facing Olia Gavrysh, Program Manager at .NET team in Microsoft. And she mentioned how she liked the shirt (and that Immo Landwerth, another Program Manager in .NET team would like it too (maybe that was a sarcasm)) and that I should make the shirt available for buying.
Removing explicit default access modifiers in Visual Studio using EditorConfig
Almost five years ago I wrote post Removing explicit default access modifiers (Roslyn analyzer and codefix) and it was a great exercise and I still prefer to have code without all the private, etc. noise. But also nowadays Visual Studio supports all sorts of code style rules via EditorConfig file. Can I teach Visual Studio to actually suggest removing explicit default access modifiers?
Raňajky s GOPASom: Optimalizácia v .NET (jednoducho a isto)
Tentokrát tu mám jednu pozvánku na akci, kterou si můžete trochu netradičně naladit na svých přijímačích ráno a udělat si společně s mou maličkostí informacemi nabitý start dne ve vašem homeofficu. Jedná je o akci “Raňajky s GOPASom: Optimalizácia v .NET (jednoducho a isto)” tento čtvrtek od 9:00.
Delete button in resource group in Azure portal
I don’t know whether this has been in the portal “forever” and I never noticed or if it’s a new thing. Anyway, it’s a nice feature and I’m enjoying it, so I might as well share that with you.
WUG: Azure Front Door – Co může nabídnout vašim aplikacím (online)
Online akce teď na WUGu jedou a vypadá to, že se nebude polevovat. Takže, aby data tekla a linky se žhavily, připravte routery 2.6.2020 od 17:30 na WUG. Povíme si něco o tom co je Azure Front Door a tak okolo.
Glorious day as a trainer and conference speaker
Today was a crazy – rollercoaster like – day. Let me tell you all about it even though it’s about 7 o’clock in the evening now and I’m very tired. I feel like this clown on my daughter’s desk.
Cloud DeveloperDays 2020 (online)
Starting tomorrow, for two days, the Cloud Developer Days is going to be held online. And it’s free. I was lucky to have two sessions selected and I hope to meet you on chat.
I miss using email
I miss good old email. You know the tool that anybody can reach you at, you can use any tool you want and basically can do anything with it yourself.
Let me give you bit of “messaging” history from my own world and I’ll circle back to email at the end.
Zlepšite si svoj zdrojový kód pomocou Roslyn-u (KROS Dev Meetup #3)
Vypadá to, že místní svět si na remote spolupráci zvyká a přizpůsobují se i konference a jiné akce. Nezahálí ani KROS Dev Meetup a v jeho třetí edici tam povím něco o možnostech zlepšování kódu pomocí Roslynu. Takže si nezapomeňte přidat do kalendáře 19.5 v 18:00. Kromě mě, bude jestě druhá přednáška na téma “Automatické End-to-End testy”.
Firebird database with more than 2^32 transactions
Firebird 3 added support for transaction ID to go over, originally, 231 and later 232, all the way up to the 248. Although a great improvement it might become a problem if the client library can’t properly handle that in a few places where these numbers are surfaced.
Gopas TechEd 2020 (online)
Situace zrovna konferencím nepřeje, ale každoroční TechEd bude a bude online, a víceméně už za týden. Připravil jsem dvě přednášky (jednu společně s Vladimírem Mužným).
FbNetExternalEngine 4.5 released
FbNetExternalEngine version 4.5 is released. This version contains improvements around Management procedures.
WUG: Co je ten Span<T> zač a proč by mě to mělo zajímat (online)
Když už teď IT, webkamerky a mikrofony drží pro většinu lidí soustruhy v chodu, tak proč nezkusit něco online i v rámci WUGu… V úterý 21.4.2020 od 18:00 si zkusíme povědět něco o relativně novém datovém typu Span<T>.