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• Graphical Programming Language

  - by prosseek

  In control engineering or instrumentation, I see Simulink or LabVIEW(G) is pretty popular. In ESL design, I see that Agilent SystemVue is gaining some popularity. If you see the well established compiler theroy, almost 100% is about the textual language. But how about the graphical language? Is there any noticable research or discussion about the graphical programming language? In terms of Theory about Graphical Language - syntactic/semantic analysis and whatever relevant expressiveness (Actually, I asked a question about it at SO - http://stackoverflow.com/questions/2427496/what-do-you-mean-by-the-expressiveness-in-programming-lanuguage) Possibility of the Graphical language ... Or what do you think about the Graphical Programming Language?

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• How do people prove the correctness of Computer Vision methods?

  - by solvingPuzzles

  I'd like to pose a few abstract questions about computer vision research. I haven't quite been able to answer these questions by searching the web and reading papers. How does someone know whether a computer vision algorithm is correct? How do we define "correct" in the context of computer vision? Do formal proofs play a role in understanding the correctness of computer vision algorithms? A bit of background: I'm about to start my PhD in Computer Science. I enjoy designing fast parallel algorithms and proving the correctness of these algorithms. I've also used OpenCV from some class projects, though I don't have much formal training in computer vision. I've been approached by a potential thesis advisor who works on designing faster and more scalable algorithms for computer vision (e.g. fast image segmentation). I'm trying to understand the common practices in solving computer vision problems.

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• Double pointer as Objective-C block parameter

  - by George WS

  Is it possible (and if so, safe) to create/use a block which takes a double pointer as an argument? For instance: - (void)methodWithBlock:(void (^)(NSError **error))block; Additional context, research, and questions: I'm using ARC. When I declare the method above and attempt to call it, XCode autocompletes my method invocation as follows: [self methodWithBlock:^(NSError *__autoreleasing *error) {}]; What does __autoreleasing mean here and why is it being added? I presume it has something to do with ARC. If this is possible and safe, can the pointer still be dereferenced in the block as it would be anywhere else? In general, what are the important differences between doing what I'm describing, and simply passing a double pointer as a method parameter (e.g. - (void)methodWithDoublePointer:(NSError **)error;)? What special considerations, if any, should be taken into account (again assuming this is possible at all)?

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• Java Web Service Client from Microsoft Live Search

  - by trendyy

  I generated java web service from here -- http://api.search.live.net/search.wsdl.. I want to make search and listing the return values. In my opinion i generated client and client is makes research but i can't display result, how i can do that.. Can anyone check my wrote code and help me about displaying result? Thanks... import java.rmi.RemoteException; import com.microsoft.schemas.LiveSearch._2008._03.Search.*; public class searchtry { public static void main(String[] args) throws RemoteException { LiveSearchPortTypeProxy client=new LiveSearchPortTypeProxy(); SearchRequest request=new SearchRequest(); SearchRequestType1 type1=new SearchRequestType1(); sorgu.setAppId("*********************************"); //Windows Live gave this id for using that service sorgu.setSources(new SourceType[]{SourceType.Web}); sorgu.setQuery("Java"); aratip.setParameters(request); SearchResponseType0 answer= client.search(type1); System.out.println(answer.toString()); }

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• Can I set a property on an object that is only declared on the instance type, when I don't know the

  - by WilberBeast

  Let me explain. I have a List into which I am adding various ASP.NET controls. I then wish to loop through the list and set a CssClass, however not every Control supports the property CssClass. What I would like to do is test if the underlying instance type supports the CssClass property and set it, but I'm not sure how to do the conversion prior to setting the property since I don't know the type of each Control object. I know that I can use typeof or x.GetType(), but I'm not sure how to use these to convert the controls back to the instance type in order to test for and then set the property. Actually I seem to have solved this, so I thought that I would post the code here for others. foreach (Control c in controlList) { PropertyInfo pi = c.GetType().GetProperty("CssClass"); if (pi != null) pi.SetValue(c, "desired_css_class", null); } I hope that this helps someone else as I has taken me hours to research these 2 lines of code. Cheers Steve

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• GetDC() DllImport for x64 apps

  - by devdept

  If you make a little research on the internet you'll see many DLLImport styles for this user32.dll function: HDC GetDC(HWND hWnd); The question is: what type is more appropriate for .NET x64 apps (either compiled with the Platform target as AnyCPU on a x64 machine or specifically as x64)? IntPtr for example grows to a size of 8 on a x64 process, can this be a problem? Is uint more appropriate than Uint64? What is the size of the pointers this function uses when used in a x64 process? The DLL is called user32.dll does it work as 32bit or 64bit on a x64 operating system? [DllImport("user32.dll",EntryPoint="GetDC")] public static extern IntPtr GetDC(IntPtr hWnd); public static extern uint GetDC(uint hWnd); public static extern int GetDC(int hWnd); Thanks!

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• Integration of Photoshop and MySQL

  - by NewToProgrammingWorld

  I’m working to integrate Photoshop (CS4, local) with MySQL (Linux, remote), such that: a) image file information, data and meta data can be exported from PS into MySQL where same can be manipulated both manually and calculated, and then b) the MySQL fields can be referenced in Photoshop scripting for further automated image file manipulation, and c) the MySQL fields can be referenced for other purposes such as dynamic propagation of files and associated file data to a website, for example. I’ve spent many hours running searches for these concepts on StackOverflow, Google, and Adobe Support. I’m coming up empty, which leads me to believe that it’s not natively possible, and that I’ll need some middle language like PHP. Does anyone know if it’s possible for Photoshop and MySQL to bi-directionally share data? If so, how? If that’s not possible, what solution(s) might you recommend, in terms of specific tools/technologies that I can research further. Thank you.

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• Embedding a YouTube Video Based on a PHP Variable

  - by jeffpm

  I have a website that I am creating for a class project. The website shows information about bands (which is stored in a mysql database). I am trying to spruce up the site a bit, and I would like to embed a YouTube video based on the band's name. Say, for instance, I have "Led Zeppelin" stored in my database. How can I take a PHP variable containing "Led Zeppelin", search YouTube using that variable, find a random video, and then embed that in the website? From the research I've done, it seems you can only embed YouTube videos if you know the exact address of the video. Thanks!

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• RedDot with Lotus Notes support

  - by fredde

  Hi, First post here in SO. I have a question within the area of CMS (RedDot) and possible integration of some Lotus Notes functionality. I'm very fresh in both areas. From my short research (did not find very much material regarding RedDot) I got the following: Contents in RedDot CMS can be accessed (and modified?) via the RQL API. (basicly xml messages) There exists a API developed for Java (jRQL). Lotus Notes has a developer kit called Lotus Expeditor Toolkit. My vague question is something like this: Is it possible to integrate a some kind of "content approver/manager" or any other useful CMS functionality from Lotus Notes into the RedDot CMS system? In that case I was thinking of using the jRQL and Lotus Expediton Toolkit so that the back end is fully using Java. Or is there any better solution? Regards Fredrik

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• Cross Domain Post - Losing POST Data

  - by Tomas Beblar

  I have 2 servers, both running R2 / IIS7 / ASP Classic sites (can't get around any of that) Server A is making the follow calls: Dim objXMLHTTP, xml Set xml = Server.CreateObject("Msxml2.ServerXmlHTTP.6.0") xml.Open "POST", templateName, false xml.setRequestHeader "Content-Type", "application/xml" xml.Send variables Where the templateName is the URL of Server B (It's an email template) ... and variables are a name value pair string like a query string password=myPassword&customerEmail=Dear+Bob,.... Server B receives the POST but all the POST data (password=myPassword&customerEmail=Dear+Bob,....) is missing from the POST password = Request.Form("templatePassword") customerEmail = Request.Form("RackAttackCustomerEmail") The above values are all empty. Here's the kicker. This all worked on our old servers (Windows Server 2003, IIS 6) But when we migrated over, this stopped working correctly. My question is: What would cause the POST data to be dropped in IIS 7 when it all worked in IIS 6? I've done about 3 days of research into this trying many different things and nothing has worked. The POST data is just gone.

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• SQL Server Full Text Search Leading Wildcard

  - by aherrick

  After taking a look at this SO question and doing my own research, it appears that you cannot have a leading wildcard while using full text search. So in the most simple example, if I have a Table with 1 column like below: TABLE1 coin coinage undercoin select COLUMN1 from TABLE1 where COLUMN1 LIKE '%coin%' Would get me the results I want. How can I get the exact same results with FULL TEXT SEARCH enabled on the column? The following two queries return the exact same data, which is not exactly what I want. SELECT COLUMN1 FROM TABLE1 WHERE CONTAINS(COLUMN1, '"coin*"') SELECT COLUMN1 FROM TABLE1 WHERE CONTAINS(COLUMN1, '"*coin*"')

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• Does CodeIgniter have to load view in the final step?

  - by Peter

  I have a function function do_something() { // process $this->load->view('some_view', $data); exec('mv /path/to/folder1/*.mp3 /path/to/folder2/'); } My intention is to move files after outputting the view. But apparently it is done before rendering the view. My question is, does $this->load->view(); have to be the final step in a function? I did a little research, and seems like my question is similar to this topic. Correct?

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• WAMP phpundercontrol installation guide / tutorial

  - by Shiro

  Our team just thinking to start using php unit test for our problem. I not able to find a complete tutorial or installation which is install phpundercontrol in WAMP environment, I have no any experience about php unit test, but we know we need it. Our goal is everyday we would like to build the project, so we know where is the bug happen. We also would like to learn more collaboration between the team. I would like to ask / someone to teach, how to start install phpundercontrol in WAMP environment, or some link might be help. I did some research, most of the page I found kind of outdated, the command they provided doesn't work for me. Thank you so much.

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• What does SQL Server trace flag 253 do?

  - by kamens

  In another question I was trying to research how to control SQL Server's query plan caches: http://stackoverflow.com/questions/2593749/is-there-an-equivalent-of-optionrecompile-or-with-recompile-for-an-entire-c ...and I found trace flag 253 via this article: http://www.sqlservercentral.com/Forums/Topic837613-146-1.aspx The article is correct, if I run DBCC TRACEON(253) and then a number of queries, I can manually check the query plan cache and see that plans have not been inserted. If I run DBCC TRACEOFF(253), query plans are cached as normal. So my question is...what else does this flag do? Does anybody know the official story?

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• Possible Encoding Issue Reading HTM File using .Net Streamreader

  - by Brian Boatright

  I have an HTML file with a ® (copyright) and ™ (trademark) symbol in the text. These are just two among many other symbols. When I read the html file into a literal control it converts the symbols to something else. The copyright symbol converts to ? (open box in ff) The trademark symbol converts to ™ (as expected) If (System.IO.File.Exists(FullName)) Then Dim StreamReader1 As New System.IO.StreamReader(FullName) Contents.Text = StreamReader1.ReadToEnd() StreamReader1.Close() End If Contents is a <asp:Literal runat="server" ID="Contents"></asp:Literal> and it's the only control in the aspx page. From some research I think this is related to the encoding but I don't know why it would change how to fix it. The html file does not contain any Content-Type settings in the head section.

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• Interpreting Search Results

  - by Simon

  Hi all, I am tasked with writing a program that, given a search term and the HTML source of a page representing search results of some unknown search engine (it can really be anything, a blog, a shop, Google, eBay, ...), needs to build a data structure of the results containing "what's in the results": a title for earch result, the "details" link, the position within the results etc. It is not known whether the results page contains any of the data at all, and whether there are any search results. The goal is to feed the data structure into another program that extracts meaning. What I am looking for is not BeautifulSoup or a RegExp but rather some clever ideas or algorithms on how to interpret the HTML source. What do I do to find out what part of the page constitutes a single result item? How do I filter the markup noise to extract the important bits? What would you do? Pointers to fields of research covering what I try to to are aly greatly appreciated. Thanks, Simon

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• Ruby: writing a network redirector

  - by Shyam

  Hi, I would like to research protocols such as HTTP. As I am learning Ruby, I would like to write a program that works as a "gateway". I would be connecting to it's port on for example 8080 and the program should forward my request to the real host and send back the answers. The idea of my design is something like this: class EchoProxy def run # run a listening socket on port 8080 myinfiniteloop end def myinfiniteloop # continually run this loop unless the app is terminated puts traffic end end Some pointers in the right direction would be great! Thank you for your comments, answers and feedback!

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• Cocoa Touch - Display an Activity Indicator while loading a UITabBar View

  - by Aurum Aquila

  I have a UITabBar Application with two views that load large amounts of data from the web in their "viewWillAppear" methods. I want to show a progress bar or an activity indicator while this data is being retrieved, to make sure the user knows the app isn't frozen. I am aware that this has been asked before. I simply need some clarification on what seems to be a rather good solution. I have implimented the code in the example. The question's original asker later solved their problem, by putting the retrieval of data into another "thread". I understand the concept of threads, but I do not know how I would impliment this. With research, I have found that I need to move all of my heavy data retrieval into a background thread, as all of the UI updating occurs in the main thread. If one would be so kind as to provide an example for me, I would be very appreciative. I can provide parts of my existing code as necessary.

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• What is your longest-held programming assumption that turned out to be incorrect?

  - by Demi

  I am doing some research into common errors and poor assumptions made by junior (and perhaps senior) software engineers. What was your longest-held poor assumption that was eventually corrected? For example: I at one point failed to understand that the size of an integer was not a standard (depends on the language and target). A bit embarrassing to state, but there it is. Be frank: what hard-held belief did you have, and roughly how long did you maintain the assumption? It can be about an algorithm, a language, a programming concept, testing, anything under the computer science domain.

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• On-line business card creator with PDF proof

  - by Adam

  I'm doing some research, and looking to create a simple on-line business card creator. I need to give users the ability to pick a business card template and then update the text with their own information. Then I need to create a PDF proof for the user to sign off on, as well as create a hi-rez pdf for print. Can anyone point me in the right direction? I'm trying to find some resources on how to create the PDF Heres a quick example I found of what I'm trying to do. https://www.staplescopyandprint.ca/PrintOnline/InputFields.aspx?type=PersonalCard Any input at this point would be a big help thanks!

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• Python Threading

  - by anteater7171

  I'm trying to make a simple program that continually displays and updates a label that displays the CPU usage, while having other unrelated things going on. I've done enough research to know that threading is likely going to be involved. However, I'm having trouble applying what I've seen in simple examples of threading to what I'm trying to do. What I currently have going: import Tkinter import psutil,time from PIL import Image, ImageTk class simpleapp_tk(Tkinter.Tk): def __init__(self,parent): Tkinter.Tk.__init__(self,parent) self.parent = parent self.initialize() def initialize(self): self.labelVariable = Tkinter.StringVar() self.label = Tkinter.Label(self,textvariable=self.labelVariable) self.label.pack() self.button = Tkinter.Button(self,text='button',command=self.A) self.button.pack() def A (self): G = str(round(psutil.cpu_percent(), 1)) + '%' print G self.labelVariable.set(G) def B (self): print "hello" if __name__ == "__main__": app = simpleapp_tk(None) app.mainloop() In the above code I'm basically trying to get command A continually running, while allowing command B to be done when the users presses the button.

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• Self host WCF (Windows Communication Foundation) Ajax services

  - by Wayne Lo

  I am having trouble to understand how to expose the WCF services through Javascript. Here are what I found after days of research: Exposing WCF services through Javascript but not self host: http://msdn.microsoft.com/en-us/library/bb472488.aspx In this example, it requires the creation of a .svc file <%@ServiceHost language="c#" Debug="true" Service="Microsoft.Samples.XmlAjaxService.CalculatorService" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %> Self host WCF Ajax services but not exposing the services through Javascript. http://msdn.microsoft.com/en-us/library/bb943471%28v=VS.100%29.aspx Please help. Thanks.

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• iPhone Live Video Stream Media Player

  - by happyhammer83

  I'm hoping to make an app that streams live video that has a view placed on top with labels and a button on it. From my research and testing of the http video streaming feature (available since iPhone 3.0 OS), it seems that you create a webview that points to the index html that contains the converted video stream, and this displays as a quicktime video in the app. This means that I don't have control over the Media Player that is opened. Does anyone know how you can control this? I know that the Apple's MoviePlayer sample code shows you how to place views on top of a MediaPlayer video, but how can this be done with a http live stream? Thanks in advance.

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• What language/API to use for a standalone live-input audio visualizer app?

  - by knuckfubuck

  I develop with Actionscript and was glad to see that AIR 2.0 was going to give access to mic input data. I planned to use this to create a visualizer set to the tempo of the incoming live audio. After doing a few days of google research it seems unlikely that it will be possible to analyze the data of the mic input in Flash/AIR. If anyone has ideas on how I can achieve this in AIR please let me know. (I'm open to workarounds.) That being said, I don't want to give up on the idea so I'm interested in suggestions for other language/API to use. My requirements for the app are: Run on OSX Two windows - one that can go fullscreen while the other(controller GUI) stays put Able to access live mic input data I've done reading on FFT and understand what needs to be done on the sound side so no need to help with that.

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• Is there an existing solution to the multithreaded data structure problem?

  - by thr

  I've had the need for a multi-threaded data structure that supports these claims: Allows multiple concurrent readers and writers Is sorted Is easy to reason about Fulfilling multiple readers and one writer is a lot easier, but I really would wan't to allow multiple writers. I've been doing research into this area, and I'm aware of ConcurrentSkipList (by Lea based on work by Fraser and Harris) as it's implemented in Java SE 6. I've also implemented my own version of a concurrent Skip List based on A Provably Correct Scalable Concurrent Skip List by Herlihy, Lev, Luchangco and Shavit. These two implementations are developed by people that are light years smarter then me, but I still (somewhat ashamed, because it is amazing work) have to ask the question if these are the two only viable implementations of a concurrent multi reader/writer data structures available today?

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