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  • Is there a Java equivalent to libevent?

    - by JoelPM
    I've written a high-throughput server that handles each request in its own thread. For requests coming in it is occasionally necessary to do RPCs to one or more back-ends. These back-end RPCs are handled by a separate queue and thread-pool, which provides some bounding on the number of threads created and the maximum number of connections to the back-end (it does some caching to reuse clients and save the overhead of constantly creating connections). Having done all this, though, I'm beginning to think an event-based architecture would be more efficient. In searching around I haven't found any equivalents to libevent for Java, but maybe I'm not looking in the right place? Mina-statemachine from Apache was the closest thing I found, but it looks more verbose than I need and there's no real release available. Any suggestions?

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  • a loading screen for a c# wpf listbox

    - by evan
    I'm using a list box where there are on average about 500 thumbnails (items) that can be sorted and searched. Since I'm using default databinding and search descriptors (which I've heard are slow due to reflection) the list takes a noticeable pause of a few seconds loading, sorting, and searching (the list dynamically updates based on the contents of the search box so the first one or two letters typed are really slow). I don't think I can fully do away with reflection give the timeframe for the project, and speed isn't super essential, but I'd like some kind of graphical indication of the delay so it doesn't confuse the user. How could I do something like a website video loading screen where the listbox grays out and some kind of loading circle indicates it's processing until the list is ready? Or even just grayed out with the words "Loading..." for a few seconds could work. Any ideas? Thanks in advance for your help and suggestions!!!

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  • Windows Pre-commit hook for comment length Subversion

    - by coffeeaddict
    I seem to be getting nowhere with this. Either searching the web for a script, etc. Anyone got a script that you can just edit the out-of-box pre-commit.tmpl in a Windows environment that requires x chars to be entered in for a comment on commit in Tortoise Subversion globally so that all members on the team are required whereas this requirement is pushed down to the clients from SVN server? I don't know the scripting language and this should be something pretty damn simple without me taking the time to figure out scripting for the next 3 hours.

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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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  • Add columns to SqlWebEventProvider

    - by Julien N
    In an asp.net application, we'd like to use the SqlWebEventProvider to log any Event that occurs during the application lifetime. The problem is that we think that the table aspnet_WebEvent_Event doesn't provide enough columns and should log more information (we need to keep the Logged user). I'm aware that this information could be stored in the "Details" column but it wouldn't then be really simple to filter the results and build reports. So I'm searching for a simple solution to add a column. I wish I could derive SqlWebEventProvider but the methods used to build the stocked procedure parameters are private (PrepareParams() and FillParams()). Any simple solution that doesn't imply to rewrite the entire Provider class ?

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  • SQL 05 full-text query fails "Specified module could not be found."

    - by Dan Bailiff
    I'm running SQL 2005 on Windows XP. I have a database table that has full text searching enabled. I was able to build and even re-build the index. However, when I try to query it like this: Select * from fulltext_english WHERE CONTAINS(page_data, 'causes') I get this error: Msg 7619, Level 16, State 1, Line 1 The execution of a full-text query failed. "The specified module could not be found." Did I miss something on the install? Is this a dll issue? I've googled and binged for days and can't find anything similar to this message. Thanks!

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  • Converting "is null" into a linq to sql statement

    - by Darryl Braaten
    I am having trouble replicating the following sql as a LINQ statement select TableA.* from TableA left outer join TableAinTableB on TableA.Id = TableAId where TableBId is null The following returns no lines from TableA in db.TableA join AinB in db.TableAinTableB on TableA.Id equals TableAId where AinB.TableBId == null select TableA Also tried and a few other things that didn't work. from TableA in db.TableA join AinB in db.TableAinTableB on TableA.Id equals TableAId where AinB == null select TableA TableAinTableB is a many to many table. The query I want will pull all the records from TableA that have no records in the middle table. My sql does what I want but I have no idea how to convert it to LINQ to SQL. I ended up working around it by just doing a db.ExecuteQuery("working sql"); But I would like to know if the query is possible in LINQ and how to write it, or a pointer to a document that covers this scenario. My searching did not uncover anything I found useful.

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  • How to Filter more than one field using WPF AutoCompleteBox

    - by Drew
    i am trying to customize the suggestions on the AutoCompleteBox in the WPF Tool kit. Right now i have a last name field which when the user enters characters a query runs that retrieves the top 10 records based on that last name. i would also like to filter by first name, i tried splitting out the comma and searching by the last name and the characters entered in the first name. however, as soon as a space or comma is entered into the autocompletebox, the suggest functionality stops working, which I believe is because the ValueMemberPath property is set to be last name. Is there a work around for this, or a way to modify the ValueMemberPath to handle multiple values? Thanks!

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  • bash script problem, find , mv tilde files created by gedit

    - by Ke
    Hi, im using linux with gedit which has the wonderful habit of creating a temp file with a tilde at the end for every file I edit. im trying to move all of these files at once to a different folder using the following: find . -iname “*.php~” -exec mv {} /mydir \; However, its now giving me syntax errors, as if it were searching through each file and trying to move the piece of text. I just want to move all of the files ending in .php~ to another directory. Any idea how I do that? Cheers Ke

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  • linq to sql datacontext for a web application

    - by rap-uvic
    Hello, I'm trying to use linq to sql for my project (very short deadline), and I'm kind of in a bind. I don't know the best way to have a data context handy per request thread. I want something like a singleton class from which all my repository classes can access the current data context. However, singleton class is static and is not thread-safe and therefore not suitable for web apps. I want something that would create a data context at the beginning of the request and dispose of it along with the request. Can anyone please share their solution to this problem? I've been searching for a solution and I've found a good post from Rick Strahl : http://www.west-wind.com/weblog/posts/246222.aspx but I don't completely understand his thread-safe or business object approach. If somebody has a simplified version of his thread-safe approach, i'd love to take a look.

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  • Best open source alternative for MS Visual Source Safe?

    - by afsharm
    We are leaving VSS for TFS or any other alternatives. I'm the one who persists to go for an open source alternative like SVN. Now I'm searching for a good open source Version Control regarding following aspects: We are in love with open source movement and cross-platform. Could it be possible to use it with Mono, SharpDevelop and Express editions of VS instead of Visual Studio itself? What about backup? Is it integrated with VS without serious problems? Any API or command prompt access? Please notice I've read following previous texts about it but still need more help: http://stackoverflow.com/questions/690766/vss-or-svn-for-a-net-project http://stackoverflow.com/questions/61959/tfs-vs-open-source-alternatives http://stackoverflow.com/questions/44588/how-to-convince-a-company-to-switch-their-source-control

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  • acessing network shared folder with a username and password string in vb.net

    - by Irene
    i am using the following code to read the details from a network folder which is restricted for only one user shell("net use q: \\serveryname\foldername /user:admin pwrd", AppWinStyle.Hide, True, 10000) Process.Start(path) shell("net use q: /delete") when i run this to open any pdf or jpg or any other files except word/excel/powerpoint, everything is working fine. but the problem comes only when i access a word file. in the step one, i am giving permission to access the word file. in the step two, word file is open. in the third, i am deleting the q drive. the problem is the word file is still open. so i am getting a dos window, saying that "some connections of still connected or searching some folders, do you want to force disconnect" please help.... how to access a word file (editable files) providing user name and password from the code and at the same time he shoud not have access to any other folders directly.

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  • Creating Graphs on an iPad/iPhone

    - by phantomdata
    I was wondering if anyone knew of a simple way to implement graphing in an iPhone/iPad application. I've spent quite a bit of time googling and can't seem to find any sort of a solution. Maybe I'm just searching with the wrong terms since a lot of consumers are asking about "graphing" in terms of using their applications, not developing them, the search-space is rather polluted. It seems like a lot of iPad/iPhone applications have embedded graphs... and I can't imagine that every developer has invented their own graphing engine from the ground up. Or, maybe they have... Does anyone have any suggestions?

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  • How do I actually use Authorization Services?

    - by abrahamvegh
    I've been searching and experimenting for nearly four hours now, so I'm gonna just ask straight up: How can I correctly use the Authorization Services API to show the user a system-level authorization window, the same one you see when you click a lock icon in System Preferences? From what I can tell, there is no way to do it using Cocoa if you want to do it programmatically, and if your goal is to call an executable that normally needs to be called via sudo (in my case, /usr/bin/pmset) you're up a creek without a paddle. I challenge you, I implore you: Please, enlighten me. Thank you. :)

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  • How can I retain the editing in the tableView of the search result with UISearchDisplayController?

    - by wal
    I want to search a table in editing mode, but when I type a letter the variable tableView.editing is changed to NO. And when I cancel the search, the tableView.editing return to YES. I'd like to retain the editing YES in the result of the search. I put breakpoint in several methods. Until the filterContentForSearchText method, the variable is YES, but in the cellForRowAtIndexPath, it is NO. Image of the table in editing mode just before type a letter in the search bar. Image of the search Image of the table after the searching (editing mode again)

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  • WPF data grid - Column Header not aligned with data rows

    - by Pawan
    Hi, I am using Datagrid in WPF. This is a very simple and basic implementation. I not using any styles. I created a simple datagrid : <dg:DataGrid x:Name="dg" > </dg:DataGrid> and populated it with data as: dg.ItemsSource = " H E L L O W O R L D!".Split(); Grid gets properly populated but the columnheader of the grid is drawn with some offset. Due to this my data and header are mis aligned. I tried searching for this over net but I haven't found anything. This seems to be a straightforward implementation which is working for everyone except me :(. Can anyone please tell me what might be going wrong? I have tried using different data sets and appyling some style to test this. Thanks in advance.

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  • XML/XHTML replace content?

    - by Daveo
    I have a XHTML string I want to replace tags in for example <span tag="x">FOO</span> <span tag="y"> <b>bar</b> some random text <span>another span</span> </span> I want to be able to find tag="x" and replace FOO with my own content and find tag=y and replace all the inner content with by own content. What is the best way to do this? I am thinking regex is definitely out of the question. Can XPATH do this or is that just for searching can it do manipulation?

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  • Corporate Wiki Organization - Technical Documentation

    - by Dave Jarvis
    Corporations have documents describing various aspects of their technical systems, including: Custom Applications Custom Development Frameworks Third Party Applications Accounting Bug Tracking Network Management How To Guides User Manuals Software Tools Web Browsers Development IDEs Graphics GIMP xv Text Editing File Transfer ncFTP WinSCP Hardware Servers Web Database Exchange File Network Devices Printers What other items are missing from the list, and how would you organize it? (For example, would Software Tools make more sense under Third Party Applications?) Try to think about where you, a software developer, would expect to find the information by browsing (not searching). A few constraints: The structure should not go beyond three levels deep. Avoid the word "and" in favour of two different categories. Keep the structure general: it should appy as broadly as possible. Target audience is primarily technical.

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  • Setting a Silverlight textbox control's width relatively

    - by John K.
    Hello, I tried searching on stackoverflow for an answer to my question but couldn't seem to find anything relevant. Since I'm relatively new to Silverlight, I'm not even sure if this is possible, but I am trying to figure out if it is possible to set a Silverlight textbox control's width value proportionally to it's immediate parent container? It would be nice to avoid hard coding a width value. Say you want to place a textbox control inside a horizontally aligned StackPanel control and have it's width always dynamically adjusted to be 80% of the total width of the StackPanel. Is this possible to do declaratively in your xaml markup, or will I need to resort to some codebehind attached to some event handler to accomplish this? fyi, I am currently using Visual Web Developer Express 2008 to write my silverlight code. thanks in advance, John

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  • Image Viewer application, Image processing with Display Data.

    - by Harsha
    Hello All, I am working on Image Viewer application and planning to build in WPF. My Image size are usually larger than 3000x3500. After searching for week, I got sample code from MSDN. But it is written in ATL COM. So I am planning to work and build the Image viewer as follows: After reading the Image I will scale down to my viewer size, viwer is around 1000x1000. Lets call this Image Data as Display Data. Once displaying this data, I will work only this Display data. For all Image processing operation, I will use this display data and when user choose to save the image, I will apply all the operation to original Image data. My question is, Is is ok to use Display data for showing and initial image processing operations.

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  • display of umlauts in firefox

    - by Mike D
    I was doing some web searching and found some strange things involving umlauts. For example if you do a google or yahoo search for the word "nther" you are likely to find things like G&#xfc;nther which I take to be Gunther with an umlaut over the u. Now my question is what if anything can I do to cause these characters to be properly displayed by Firefox under windows XP? An amazing thing is that I had to introduce spaces in the G & # etc string otherwise it was properly displayed here as u with umlaut!

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  • How do I setup a Master Page with ASP.net?

    - by Michael
    Hi there, I'm normally a ColdFusion developer, but I'm having to work on a new site using some ASP.net hosting only, so forgive me if my questions seem very trivial. For numerous reasons, the website will be relatively static in the sense that it will mainly be using includes etc...that's about as complex as it will get with this. Now, I heard about the ability to set a master in ASP.net. Would anyone please be able to explain to me in a step process on how to do this? I have of course been searching for some time now on this topic but most results yield little help or no help at all since the search terms are slightly ambiguous. It would be nice to have this functionality for the long run. Any help or advice would be great. Many thanks. Michael.

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  • Acquiring AD OU list.

    - by Stephen Murby
    Hi, I am looking to be able to pull a list of current OU's from Active Directory I have been looking at some example code online for sometime, but O don't seem to be able to get this to work. string defaultNamingContext; DirectoryEntry rootDSE = new DirectoryEntry("LDAP://RootDSE"); defaultNamingContext = rootDSE.Properties["defaultNamingContext"].Value.ToString(); DirectorySearcher ouSearch = new DirectorySearcher(rootDSE, "(objectClass=organizationalUnit)", null, SearchScope.Subtree); MessageBox.Show(rootDSE.ToString()); try { SearchResultCollection collectedResult = ouSearch.FindAll(); foreach (SearchResult temp in collectedResult) { comboBox1.Items.Add(temp.Properties["name"][0]); DirectoryEntry ou = temp.GetDirectoryEntry(); } The error I get is There provider does not support searching and cannot search LDAP://RootDSE Any Ideas? for each of those returned search results I want to add them to a combo box. (shouldn't be too hard)

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  • MySQL configuration that allows for locking many tables?

    - by Floyd Bonne
    I need to do a MySQLDump on a DB with ~700 tables and when I try with my current configuration, I get an error: mysqldump: Got error: 1016: Can't open file: './my_db/content_node_field_instance.frm' (errno: 24) when using LOCK TABLES Searching around I've found that this happens because it tries to lock all tables and fails because they are "too many". I know I can try lock-tables=no and get a dump, but this way my DB might be in an inconsistent state. So, does anyone know what is the MySQL configuration setting I need to change in order to be able to do the locking I need? I'm running 5.1.37-1ubuntu5.1 with MyISAM. Thanks!

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  • iTunes Apple Events API

    - by jldupont
    I'd like to control iTunes through Objective-C ( I just can't get Python appscript installed correctly on my OS/X 10.6.3 system ... that would have been my first choice ). From what I gather, the IPC on Cocoa is based on Apple Events : is there either: Online documentation on iTunes / Apple Events API ? Instrospection mechanism to get to iTunes API? I know about Applescript Editor / Open Dictionary functionality but I can't figure out how to translate the information I see into IPC calls. Note: I have already tried working out a solution through PyObjC but the main function I am after is track searching which I can't figure out. Disclaimer: OS/X super-newbie here.

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