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Thank you for the very quick and useful reply. I'm using Visual Studio 2017. What I meant was that when I type "__int128" it turns blue as if it were a native, intrinsic type like int or char. I didn't know it was a struct.
What is a "soft-float"? And can you elaborate a little on why it is slow?
Also, it seemed you wanted to emphasize on the 32bit when you wrote this:
long long in 32bit C++ code, (u)long in C# running as 32bit code
Does that mean the types behave differently or are somehow different, for instance in size, when I either compile a program as 64-bit or run it as 64-bit rather than 32-bit?
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__m128 is supported in VS 2017, you'd need #include <intrin.h>
deXo-fan wrote: What is a "soft-float"? And can you elaborate a little on why it is slow?
It just means that the operations on it are all emulated in software, which is fairly complex. In a circuit that cost can be significantly hidden thanks to the flexibility (eg extracting bits is "free", just a wire, but in software it would cost a shift and mask) and parallel nature of the medium, but in software it's all a major pain, so much that depending on the benchmark decimals may be one to two orders of magnitude slower than doubles. For integer operations, emulating bigger types in software is much less harmful to performance.
deXo-fan wrote: Does that mean the types behave differently or are somehow different, for instance in size, when I either compile a program as 64-bit or run it as 64-bit rather than 32-bit?
Not that, but a 64bit program can use native 64bit instructions (so operations on an (u)long are natively supported), while a 32bit program mostly cannot (at least it cannot operate on 64bit GPRs since those do not exist, it could cheat a bit with 64bit SIMD but that isn't fully featured). For example the normal add instruction has a 64bit version, which is only available in 64bit mode.
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My BigInt[^], shows how you can create a "VeryLargeBigInt" type, and calculate numbers that are larger than a typical "int" type can hold.
Basic idea is that you can use smaller operations to do the complex one, in software.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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I am analyzing the implementation of OPENID connect. I understand that Identity server provides a token to the client application after successful login.
My Question is can I pass this token to another website if redirection is required. Following are some moredetails
1- WebApplication1 authenticates a user using OpenID connect and get a token.
2- WebApplication1 needs to redirect/navigate to WebApplication2
3- Users for WebApplication1 and WebApplication2 are the same.
4- WebApplication1 passes the token to Webapplication2 while redirecting
5- Now, if webapplication2 re-validates the token from the OpenID server, will the server verify it?
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I'm working on a typical n-Tier app. WPF UI, BL, and DAL.
When the user clicks the New Company button, fills out the company, then clicks Save... How would you check for a duplicate company name?
1) Send the data to DAL, then throw if it's duplicate. This means a custom exception class to specifically handle that exception.
2) Make a call to a method on the DAL such as DAL.IsCustomerNameDup("Acme").
If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.
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If you do 2, then the situation may have changed by the time you get your results. So I do 1 
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I do both. It's always best to give the user a chance to correct data as soon as possible so the second option is aimed at letting the user know before they actually try to commit the records. The first option is a safeguard for the cases where multiple users hit the database at roughly the same time.
This space for rent
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So do you throw your own custom exceptions?
If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.
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Yes. The reason I do this is because the code that writes to the database is often several layers away and catching a specific DuplicateCustomerName exception at the point of clicking save is a lot neater than having to pass return codes all the way up the chain.
This space for rent
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I agree. Thanks Pete
If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.
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Pete O'Hanlon wrote: I do both.
I would probably put a constraint on the table though either in addition to or instead of.
But that is probably overkill.
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Depending on the volume and the latency I often put in an auto complete box that kicks in after 3 characters, disables the textbox while getting the data from the DB. This can be annoying if the latency is too slow.
And/Or I add a manual search button.
Never underestimate the power of human stupidity
RAH
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"Save" means "add or update"; unless you're dealing with "modes"; in which case, you add in "new mode" and save / replace / update in "edit mode". (And maybe "delete" in "neither" mode).
And insert is usually atomic whereas an "update" usually involves a transaction (i.e. commit / roll-back).
"(I) am amazed to see myself here rather than there ... now rather than then".
― Blaise Pascal
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Kevin Marois wrote: How would you check for a duplicate company name?
Besides the reply below however I would also verify the requirement (business makes that requirement not developers.)
Because unless the company is only doing business in one region there will be companies with duplicate names and often in the same type of business as well. Not a good idea if the sales people have to tell "Joes pizza" that they cannot have that name because some one in a different region already has it.
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Can anyone suggest how to learn design and architecture in .NET
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At least for me "Architecture" in most cases is not "in" anything. If I consider there to be a significant point that requires a specific solve then I might document a specific technology for that.
Often technology is not even specified explicitly. So I might document an api in general in the Architecture document but implicitly assume that it will be Rest methods.
Conversely a design, might specify a technology but again it might be implicit. So for example if I want to document the significant parts of a message being passed to a Rest method then I might do it as a JSON object without stating that the Rest methods will be using JSON. Again this might change if there is a specific problem that seems to require a specific technology then I would use that.
Conversely if you want to work in the .NET eco-system then understanding the technologies available in it would enable to you implicitly start relying on them.
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Are there any recommended articles on codeproject to get started with this topic ?
(PS: I know google may be my friend but..)
Caveat Emptor.
"Progress doesn't come from early risers – progress is made by lazy men looking for easier ways to do things." Lazarus Long
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The only way to find out is to go and search the articles section.
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heee
Caveat Emptor.
"Progress doesn't come from early risers – progress is made by lazy men looking for easier ways to do things." Lazarus Long
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I have an app that FTP's files to clients PC's. I only want to get files that have changed since the last get.
Problem is, the file dates are all set to the Date/Time the file was FTP'd to the server.
I tried using FtpWebRequest
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("<a href="ftp:
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
request.Credentials = new NetworkCredential("user", "pwd");
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
string names = reader.ReadToEnd();
reader.Close();
response.Close();
But this only shows the last modified date, which is the date it was uploaded to the server.
How can I tell weather or not a file has changed since the last download?
If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.
modified 30-Jan-18 12:37pm.
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You're using a WebRequest; not sure if it would work, but for a normal webserver I'd set the LastModified[^] and see if it returns a HTTP304.
That's how I keep my host-file up to date 
Kevin Marois wrote: How can I tell weather or not a file has changed since the last download?
If files are only modified over FTP, then the upload is the last change, isn't it?
For the host-file, I "remember" locally when I fetched my version, and send that datetime when requesting the new version. Only http-headers are sent back, so not much traffic
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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Problem definition is fuzzy.
If you are sending files to a client PC then you can manage the files on your server completely.
For example
1. You have a landing directory, on your server, where files arrive
2. You MOVE files from that directory to your processing directory and update a processing log file.
3. You keep track of the files that were successfully sent to each client and correlate it with the file in 2 to insure what new files need to be sent. You send files from the processing directory, not the landing directory.
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Dear Community. I'm not professional developer, but I have constant need for some small specific applications. Usually I can't find free and adequate solutions for these purposes and finally decided to learn how to write my own. But I can't find suitable development solution.
1. I know C# (more or less) since I'm learning Unity coding and was studying this language at University. I don't want to learn something else at this point.
2. I need to create applications that run on Windows and Linux (since I use both OS) without re-writing front-end (or the whole application) from scratch for each platform.
3. I need rich GUI like in JavaFX or desktop-web applications (like Electron-based) which will be looking the same way on each platform. I DO NOT need native look/feel. Two purposes for that: 1) I need to implement some graphical data visualization (bars, diagrams, etc.) and 2) I'm a designer and I love nice looking applications.
4. I need free solution. I'm not planning some kind of distribution or selling my apps, they're just for me for now, but if one day I decide to do this, I don't want something that will stop me or force me to open my code somehow (through GPL, for example).
5. Ideally I need solution with WYSIWYG-editor (like with WPF or JavaFX).
Is there something that fits these conditions?
* I think GTK is not suitable for me because of its orientation to native looking. And GTK apps look just odd on Windows. And as far as I can say there's not much visual capabilities here.
* I think Qt is also not suitable because of its license. Most of Qt libraries are GPL, while some of them LGPL. And the whole license theme here is unclear for me (and not only for me, there's a lot of topics on forums about it).
* I don't want to use Electron because, well – wrapping relatively small application with the whole Chromium engine? Really? I've used some of Electron application and they're slow, big (in term of disk space) and eating lot of memory.
* JavaFX is looking really great, but it is the new programming language for me. I get the point that C# and Java are relatively similar, but I really don't want to dive deeper into some new language. And besides I'm still not sure about performance and dependency from JRE.
* Xamarin doesn't have compiling ability to Linux.
* There's also JUCE Framework, but as far as I can say it needs C++ and hasn't truly free license.
* I heard about AvaloniaUI, but as far as I get it – it's not mature enough for production needs.
For now I ended up learning Sciter (didn't hear anything about it before and I'm sure that many people didn't). It's like Electron but without Chromium and with lightweighted engine instead. And it can use C# for back-end. But there's very few tutorials on the web, absolutely nothing on YouTube, small community. And I found creating UI just with bare HTML/CSS/JS without some kind of WYSIWYG-editor is pain in my ass. And, well, I almost don't know JS, so it takes time to make something.
I understand that I probably want too much. But maybe I missed something? Thanks in advance!
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