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David Fowler 🇧🇧🇺🇸

@davidfowl

Jun 15

New feature that came out with minimal APIs in .NET 7 preview 5 (devblogs.microsoft.com/dotnet/asp-net…), the ability to declare parameter list surrogates: #dotnet #aspnetcore

You can refactor long argument lists into structs as a "zero cost abstraction". The struct's members will be bound as if they were parameters declared on the method.

It's not all or nothing, you can also do this with a subset of the parameters:

Read 5 tweets

David Fowler 🇧🇧🇺🇸

@davidfowl

Jun 15

@msftorleans

Let me take you on my @msftorleans journey. Let's say you wanted to define a class that let callers subscribe to an event C#. It could look like this: #dotnet

This implementation uses C# events, but let's be a little more verbose and define the contract for subscribing and unsubscribing callbacks:

Now we store a list of Action for subscribers, and we mutate this list when there's a new subscriber or if one is being removed. Calling DoThing will call each subscriber sequentially.

Now lets make this a little more object oriented and Java like (no shade my java people):

Read 7 tweets

David Fowler 🇧🇧🇺🇸

@davidfowl

Jun 14

https://twitter.com/davidfowl/status/1536513530400153600

I thought this was common knowledge by now, but software engineers at “big tech” and in some of the major tech hubs in the US makes lots of money. I’d encourage you to look at levels.fyi to see the potential earnings at these companies. #techtwitter #BlackTechTwitter

https://twitter.com/davidfowl/status/1536513530400153600

That said this is about potential. This site doesn’t show how many people exists at these levels, let alone how many underrepresented people exist at some of these levels.

At Microsoft about 5.6% (query.prod.cms.rt.microsoft.com/cms/api/am/bin…) of the population is black and I know, just by looking around that there are a lot fewer in the upper echelons of levels. The percentages are more abysmal the further up the chain you go.

Read 4 tweets

David Fowler 🇧🇧🇺🇸

@davidfowl

Jun 4

Today we had a meeting about experimenting with a green threads implementation in .NET. More info to come soon, exciting times! #dotnet

For clarity, these are threads managed by the runtime instead of the operating system. The net effect is that you can write synchronous looking code that scales as well as async/await does today.

@munificentbob

For those trying to better understand the problem we're trying to solve here, read this well written article by @munificentbob journal.stuffwithstuff.com/2015/02/01/wha…

Read 14 tweets

David Fowler 🇧🇧🇺🇸

@davidfowl

Feb 12

I'm not sure about using redis as a queue, seems like blocking operations block the connection? Also, when using BROP to monitor multiple queues, you end up shuffling the queue names so the queue at the front of this list doesn't take priority (round robin?)

Or do you spin up multiple connections and balance the queues across them? It's a multiplexing problem (reminds me of HTTP/2).

I'm using System.Threading.Channels and Redis to expose a really nuget IAsyncEnumerable<T> implementation. Then using static interfaces to provide the RedisValue -> T.

Read 5 tweets

David Fowler 🇧🇧🇺🇸

@davidfowl

Feb 6

Lets talk about events. We want to write some code that reacts when something happens. This pattern exists in many domains from UI programming to IoT to serverless. What do the programming patterns for this look like today in #dotnet and #csharp?

We create a button (imagine this was referenced by a form or some UI component), then hook up an event handler and write to the console when a button click event happens. This is the one of the most popular and idiomatic event handling paradigms in .NET today.

It's existed for years and years in many different programming languages and domains. There may or may not be data associated with these events.

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