The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘C#’ Category

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BEHIND THE CODE: The one who created languages – YouTube

Posted by jpluimers on 2021/10/13

Anders Hejlsberg: software legend.

–jeroen

Posted in .NET, C#, Development, Pascal, Software Development, Turbo Pascal, TypeScript | Leave a Comment »

Constructing Suffix Trees: Ukkonen’s algorithm – Wikipedia

Posted by jpluimers on 2021/10/12

For my link archive:

I also need to check out [WayBack] Martin Farach-Colton – Wikipedia, as his algorithm is likely more optimised and more versatile.

–jeroen

Read the rest of this entry »

Posted in .NET, Algorithms, C#, Development, JavaScript/ECMAScript, Ruby, Scripting, Software Development | Leave a Comment »

GitHub – proxykit/ProxyKit: A toolkit to create code-first HTTP reverse proxies on ASP.NET Core

Posted by jpluimers on 2021/09/28

Interesting: [Archive.is] GitHub – proxykit/ProxyKit: A toolkit to create code-first HTTP reverse proxies on ASP.NET Core:

Having built proxies many times before, I felt it is time to make a package. Forked from ASP.NET labs, it has been heavily modified with a different API, to facilitate a wider variety of proxying scenarios (i.e. routing based on a JWT claim) and interception of the proxy requests / responses for customization of headers and (optionally) request / response bodies. It also uses HttpClientFactory internally that will mitigate against DNS caching issues making it suitable for microservice / container environments.

Related:

–jeroen

Posted in .NET, .NET Core, .NET Standard, ASP.NET, C#, Communications Development, Development, HTTP, Internet protocol suite, Software Development, TCP | Leave a Comment »

Twitter thread by thread by @0xdade; More unicode shit: zero width space and a zero width nonjoiner in filenames

Posted by jpluimers on 2021/09/22

[WayBack] Thread by @0xdade: Today I learned that you can put zero width spaces in file names on Linux. Have fun. I’m playing with this because punycode/IDN is fascinati…

Today I learned that you can put zero width spaces in file names on Linux. Have fun.

I’m playing with this because punycode/IDN is fascinating, and I wanted to know what happened when I started shoving unicode in the path portion of the url, which isn’t part of how browsers try to protect URLs, as far as I can tell

wiki.mozilla.org/IDN_Display_Al…

I think it’s more entertaining to have a file that is named *only* a zero width space, but I think using them throughout a filename is better to break tab completion and not stand out too much. A filename that is just blank looks strange in ls output.
Thank goodness adduser is looking out for our best interests.
Oooh this one is pretty subtle.
Just about pissed myself with this one.

Not related to the terminal fun, but related to zero width characters:

You can:
– Break url previews https://0xda​​​​​​.​de
– @​0xdade without tagging
– Make a word like system​d not searchable twitter.com/search?q=from%…

Okay but back to command line crap. I really like this one. Create a directory named .[ZWS]

One thing that is cool about using zero width spaces is that “ls” has a flag, “-b”, that is meant to escape non-graphic characters. Inserting a newline, for instance, would be escaped to \n. But the zero width space is technically a graphic character, so nothing happens.

Fun.

Have no fear, though. It’s not unbeatable. It’s only fun if the language and LC settings are set to support utf-8. If you set LC_ALL=C or whatever that isn’t utf-8, then it looks like this.

Putting a link to this tweet here so that I don’t lose it again in the future.

dade@0xdade
Replying to @0xdade @munin

My god, it is beautiful. I mean except all the whitespace I can’t get rid of before the command lmao.

View image on Twitter

19

Twitter Ads info and privacy
But on the other hand if you just have a search for the zws, then whatever you find is probably worth investigating. 
I guess I’ll start the hashtag before @QW5kcmV3 does for #irresponsibleutf8 🤭😏😂 

And these tweets:

[WayBack] Thread by @Plazmaz: @0xdade Was doing some real fucking around with urls recently: gist.github.com/Plazmaz/565a5c… (was gonna flesh it out more but didn’t find…:

mentions Was doing some real fucking around with urls recently:

(was gonna flesh it out more but didn’t find the time) 

mentions This one is my fave:
‘⁄’ (\u2044)
or
‘∕’ (\u2215)
Allow for this:
google.com⁄search⁄query⁄.example.com
google.com⁄search⁄query⁄@example.com 

[WayBack] url-screwiness.md · GitHub:

This is a list of methods for messing with urls. These are often useful for bypassing filters, SSRF, or creating convincing links that are difficult to differentiate from legitimate urls.

And a bit of documentation links:

–jeroen

 

Posted in *nix, .NET, C#, Development, NTFS, Power User, Python, Scripting, Software Development, Windows | Leave a Comment »

How to prepare your IdentityServer for Chrome’s SameSite cookie changes – and how to deal with Safari, nevertheless – Thinktecture

Posted by jpluimers on 2021/09/15

For my link archive:

Via:

–jeroen

Posted in .NET, .NET Core, ASP.NET, C#, Chrome, Chrome, Development, Firefox, Google, Power User, Safari, Software Development, Web Browsers | Leave a Comment »

Some links on Flux outside React.js

Posted by jpluimers on 2021/08/24

The Flux architecture is often used in ReactJS, but there are also implementations outside that realm.

So here are some links for my archive:

–jeroen

Posted in .NET, C#, Delphi, Development, JavaScript/ECMAScript, ReactJS, Scripting, Software Development | Leave a Comment »

Attacking Technical Debt – ardalis

Posted by jpluimers on 2021/08/12

Interesting approach in [WayBack] Attacking Technical Debt – ardalis.

The tech stuff is C# and .NET based, but the general approach can be applied in a universal way.

via: [WayBack] Jim Holmes on Twitter “Great post by @ardalis on attacking Technical Debt. … You should also read my series on creating a Technical Debt Payment Plan, starting here: …”

So also read

–jeroen

Posted in .NET, C#, Development, Software Development, Technical Debt | Leave a Comment »

Naming of naming styles should reflect their casing · Issue #35243 · dotnet/roslyn · GitHub

Posted by jpluimers on 2021/08/04

If this is still open, please vote for it: [WayBack] Naming of naming styles should reflect their casing · Issue #35243 · dotnet/roslyn · GitHub

Having the drop down of naming styles reflect the actual output in one way or the other will make it way easier to select the correct one.

Besides that, a few new naming styles are suggested in this issue, like snake_case which is great for translating APIs that are already in that form.

Via:

–jeroen

Posted in .NET, C#, C# 6 (Roslyn), C# 7, C# 8, Development, Software Development | Leave a Comment »

Methods on enums by using extension methods: Unity sample MonoBehaviour explaining how to associate simple strings with enums.

Posted by jpluimers on 2021/07/29

Reminder to self (as I keep forgetting how versatile extension methods can be):

[WayBack] Mark Pintar sur Twitter : “The nice thing about extension methods is one can add it to most types. Even works of int, float and other primitive types… “

An interesting way of allowing methods on enumerated types is by using extension methods: [WayBack] Unity sample MonoBehaviour explaining how to associate simple strings with enums. · GitHub.

A more elaborate example from [WayBack] NoraGrace-Chess/Position.cs at master · ericoldre/NoraGrace-Chess · GitHub is below the fold.

Via:

 

using System;
using System.ComponentModel;
using UnityEngine;

public class EnumDescription : MonoBehaviour
{
    public enum PlayerState
    {
        Unknown,
        [Description("Alive and kicking")]
        Alive,
        [Description("Dead as a duck")]
        Dead
    }

    // Start is called before the first frame update
    void Start()
    {
        var state = PlayerState.Dead;
        Debug.Log("Player is " + state.GetDescription());
    }
}

public static class EnumExtensions
{
    public static string GetDescription(this Enum value)
    {
        var type = value.GetType();
        var name = Enum.GetName(type, value);
        if (name != null)
        {
            var field = type.GetField(name);
            if (field != null)
            {
                if (Attribute.GetCustomAttribute(field,
                  typeof(DescriptionAttribute)) is DescriptionAttribute attr)
                    return attr.Description;
            }
        }
        return name;
    }
}

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Posted in .NET, C#, Development, Software Development | Leave a Comment »

c# – Algorithm to check whether a certain hour falls into a given time period – Stack Overflow

Posted by jpluimers on 2021/07/15

For my link archive: [WayBack] c# – Algorithm to check whether a certain hour falls into a given time period – Stack Overflow answered by [WayBack] kennytm:

Assume you only have the time and not the date.

if end_time >= start_time:
    return start_time <= current_time <= end_time
else:
    return start_time <= current_time or current_time <= end_time

I totally agree with this comment:

This is brilliant! Thanks a lot. – Martin Dimitrov [WayBack]

I love it when algorithms are simple and elegant.

It reminded me of another scheduling related algorithm: [WayBack] Activity Selection Problem | Greedy Algo-1 – GeeksforGeeks

–jeroen

 

Posted in .NET, Algorithms, C#, Development, Software Development | Leave a Comment »

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