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  • Getting percentages.

    - by user287798
    Hi, i have got a standing answer in this thread. http://stackoverflow.com/questions/2396203/get-the-count-of-elements-where-candidate-has-won But i am failing to get the percentage, what am i doing wrong. I have the code below. var s4 = from can in allCandidates let noDists= ((from d in root.Elements("Provinces") select d.Attribute("Province").Value).Distinct()).Count() let count = (from winner in (from p in root.Descendants("Province_Data") let maxVotes = (from c in p.Elements("Candidate") select c) .Max(x => ((int)x.Element("votes"))) select (from c in p.Elements("Candidate") select c).Where(x => ((int)x.Element("votes")) == maxVotes) .First().Element("name").Value ) where winner == can select winner).Count() orderby count descending select new { Candidate = can, NumberOfProvincesWon = count,Percentage= (count/noDists)*100}; foreach (var d in s4) Console.WriteLine(" {0}", d.ToString());

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  • Complex nib is slow to load

    - by Dan Ray
    I'm looking for advice about a nib that's very slow to load. It's big and complex, with lots of subviews and doodads. When I fire my UINavController to push it, it's noticeably laggy (maybe almost a second) on my 3G. It sits there with the table cell selected and nothing else happening for long enough to make you wonder if it's broken. I wonder about pre-loading it in another thread while the user is on the previous view. I could probably fire the selector in the background with a delay in the previous view's viewDidAppear, and then keep it in a property until push time comes. Thoughts?

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  • How to analyse Wikipedia article's data base with R?

    - by Tal Galili
    Hi all, This is a "big" question, that I don't know how to start, so I hope some of you can give me a direction. And if this is not a "good" question, I will close the thread with an apology. I wish to go through the database of Wikipedia (let's say the English one), and do statistics. For example, I am interested in how many active editors (which should be defined) Wikipedia had at each point of time (let's say in the last 2 years). I don't know how to build such a database, how to access it, how to know which types of data it has and so on. So my questions are: What tools do I need for this (besides basic R) ? MySQL on my computer? RODBC database connection? How do you start planning for such a project?

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  • How to calculate Centered Moving Average of a set of data in Hadoop Map-Reduce?

    - by 100gods
    I want to calculate Centered Moving average of a set of Data . Example Input format : quarter | sales Q1'11 | 9 Q2'11 | 8 Q3'11 | 9 Q4'11 | 12 Q1'12 | 9 Q2'12 | 12 Q3'12 | 9 Q4'12 | 10 Mathematical Representation of data and calculation of Moving average and then centered moving average Period Value MA Centered 1 9 1.5 2 8 2.5 9.5 3 9 9.5 3.5 9.5 4 12 10.0 4.5 10.5 5 9 10.750 5.5 11.0 6 12 6.5 7 9 I am stuck with the implementation of RecordReader which will provide mapper sales value of a year i.e. of four quarter. The RecordReader Problem Question Thread Thanks

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  • Apache Axis web service clients vs plain SOAP requests.

    - by Andy Pryor
    I'm looking for the best way to consume a Java web service that returns rather large and complex objects. I am currently using Apache Axis clients generated from the wsdl, (using eclipse "generate web service client" tool). We have concerns about performance of this. The service proxy objects are not thread safe, and they are rather heavy to instantiate, 2-3 MB on the JVM. The other alternative is making HTTP connections and building a String SOAP requests. I would have to interpret the response, and build objects from the XML. Would this be a better alternative to the heavy axis objects? I searched for good reading on this, if any one had any links I would greatly appreciate it.

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  • What's causing "Unable to retrieve native address from ByteBuffer object"?

    - by r0u1i
    As a very novice Java programmer, I probably should not mess with that kind of things. Unfortunately, I'm using a library which have a method that accepts a ByteBuffer object and throws when I try to use it: Exception in thread "main" java.lang.NullPointerException: Unable to retrieve native address from ByteBuffer object Is it because I'm not using a non-direct buffer? edit: There's not a lot of my code there. The library I'm using is jNetPcap, and I'm trying to dump a packet to file. My code takes an existing packet, and extract a ByteBuffer out of it: byte[] bytes = m_packet.getByteArray(0, m_packet.size()); ByteBuffer buffer = ByteBuffer.wrap(bytes); Then it calls on of the dump methods of jNetPcap that takes a ByteBuffer.

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  • Search in big text log files

    - by 0xFF
    Hi, let's say you have an game server which creating text log files of gamers actions, and from time to time you need to lookup something in those logs files (like investigating an scam or loosing an item). Just for example you have 100 files and each file have size between 20MB and 50MB - How you would search them quickly? What I have already tried to do is create several threads and each invidual thread will map his own file to memory (let say memory should not be problem if it not exceed 500MB of ram) perform search here, result was something around 1 second per file : File:a26.log - read in: 0.891, lines: 625282, matches: 78848 Is there better way how to do that ? - because it seems to me kinda slow. thanks. (java was used for this case)

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  • Avoid stuck calling callback

    - by andlomba
    Hello all, This is a question about generic c++ event driven applications design. Lets assume that we have two threads, a "Dispatcher" (or "Engine"...) and a "Listener" (or "Client"...). Let's assume that I write the Dispatcher code, and release it as a library. I also write the Listener interface, of course. When the Dispatcher executes (after Listener registration) listenerInstance.onSomeEvent(); the event handling code will actually be executed by the Dispatcher thread, so if the person that implements the Listener writes something like void Listener::onSomeEvent() { while(true) ; } The Dispatcher will stuck forever. Is there a "plain old c++" (I mean no boost or libsigc++) way to "decouple" the two classes, so I can be sure that my Dispatcher will work fine whatever the Listeners does in the callbacks? bye and thanks in advance, Andrea

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  • HTML, Javascript, PHP and Actionscript all in one Eclipse install (2010)

    - by ThunderChunky_SF
    I just wanted to poll the community and see which plugins people are currently using to get all of these different technologies running in Eclipse. I saw this thread which mentioned Spket & WPT: http://stackoverflow.com/questions/1575617/eclipse-which-plugins-for-html-javascript But I noticed that Spket doesn't seem to have been updated since October of 2009 so I'm wondering if it's still a good tool to use. I'm not sure what would be best for PHP since it seems like some of the tools are disjointed at the moment. For Actionscript I know I can just install the latest Flash Builder plugin and be done. Any suggestions are greatly appreciated.

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  • jQuery dialog box not opening 2nd time

    - by Steven
    I found this thread which basically has the same issue I have. But their solution is not working for me. The dialog appears the first time I click the submit button, but not the 2nd time. I'm opening the dialog box after a form submission. UPDATE I finally got it working. Here is the correct code: if (jQuery('#registrationforms').length > 0) { //instantiate the dialog jQuery("#dialog").dialog({ modal:true, autoOpen:false }); //Some more code here to call processRegistration function. } function processRegistration(instanceID, formData) { jQuery.post("mypath/jquery_bll.php", { instance: 'processRegistration', formData : formData, instanceID : instanceID }, function(feedback) { jQuery('#dialog').text(feedback.message); jQuery('#dialog').parent().addClass(feedback.type); jQuery('#dialog').dialog('open'); },"json"); } Since I'm dynamically applying css class, I have to make sure to add it to the outer DIV which $.dialog creates to wrap my 'dialog' DIV.

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  • jQuery JSON help

    - by kim
    okay I'm new to jQuery and JSON but I have now done so I got some information from the database in JSON format and now I want to show the results in a nice way but I don't know how ;) what I want is to show 5 newest threads on my page so will this script try to load all the time or do I need to do something else? I want it to show the 5 newest threads and when there somes a new thread i should slide down and the 6 threads at the bottom should disappear Here is my code <script type="text/javascript"> $.getJSON('ajax/forumThreads', function(data) { //$('<p>' + data[0].overskrift + '</p>').appendTo('#updateMe > .overskrift'); $('<div class="overskrift">' + data[0].overskrift + '</div>') { $(this).hide().appendTo('updateMe').slideDown(1000); } //alert(data[0].overskrift); }); </script>

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  • Zend Database Adapter - Complex MySQL Query

    - by Sonny
    I have defined a function in my Navigation model that executes a query, and I was wondering if there's a more "Zendy" way of generating/executing the query. The query I'm using was proposed by Bill Karwin on another thread here for setting arbitrary record order. I tried using a prepared statement, but the values in the SIGN() function got quoted. I'm using the PDO adapter for MySQL. /** * */ public function setPosition($parentId, $oldPosition, $newPosition) { $parentId = intval($parentId); $oldPosition = intval($oldPosition); $newPosition = intval($newPosition); $this->getAdapter()->query(" UPDATE `navigation` SET `position` = CASE `position` WHEN $oldPosition THEN $newPosition ELSE `position` + SIGN($oldPosition - $newPosition) END WHERE `parent_id` = $parentId AND `position` BETWEEN LEAST($oldPosition, $newPosition) AND GREATEST($oldPosition, $newPosition) "); return $this; }

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  • Android: Touch seriously slowing my application

    - by Jason Rogers
    Hi all, I've been raking my brains on this one for a while. when I'm running my application (opengl game) eveyrthing goes fine but when I touch the screen my application slows down quite seriously (not noticeable on powerful phones like the nexus one, but on the htc magic it gets quite annoying). I did a trace and found out that the touch events seem to be handled in a different thread and even if it doesn't take so much processing time I think androids ability to switch between threads is not so good... What is the best way to handle touch when speed is an issue ? Currently I'm using : in the GLSurfaceView @Override public boolean onTouchEvent(MotionEvent event) { GameHandler.onTouchEvent(event); return true; } Any ideas are welcome

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  • How do I best write my own background-working and communicatible (sending progress updates and getti

    - by Ivan
    I have to develop a class which can run it's own hard-coded task in a background thread and communicate with container class sending him progress updates and taking messages from it. I believe I am going to extend BackgroundWorker class but it looks a bit weird to extend and I haven't managed to find a good example wit Google. Can you share a link to a good example of solving such a task? Please don't offer placing a BackgroundWorker visually on a form and reading the standard tutorial, it's not for my case. Maybe I'd better not extend but encapsulate a BackgroundWorker, but I hardly understand how to use it outide WinForms designer either :-(

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  • How to program a connection pool?

    - by the_drow
    Is there a known algorithm for implementing a connection pool? If not what are the known algorithms and what are their trade-offs? What design patterns are common when designing and programming a connection pool? Are there any code examples implement a connection pool using boost.asio? Is it a good idea to use a connection pool for presisting connections (not http)? How is threading related to connection pooling? When do you need a new thread?

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  • Dowloading a bunch of files asynchronous wait till last finished

    - by Casper Broeren
    I'm trying to download a lot of files after downloading a sql statement must insert a record. I'm using System.Net.Client to download each file synchronously, still it could be done asynchronous. There's no relation or dependency between each download. At first I just tried to use WebClient.DownloadFileAsync but that shutted the program down and killed all the download processes/threads. Second I tried to create a wait routine something like this; while (processedFiles < totalFiles) Thread.Sleep(1000) This freezed everything. So could someone tell me which aproach to take to implement this Async?

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  • Application freezes when performing help file search

    - by ralphos
    I have a large C# application and a help file in *.chm format. When I press F1 to display this help file and select "Search" tab, type something and click "List Topics" button, both the help window and the entire application freeze. What's interesting when I simply open the *.chm file in the Windows Explorer, the search functionality works brilliantly. In order to display the help file from my application, I am executing: Help.ShowHelp(this, helpFileName); This method is executed from within the main form of the application on the UI thread.

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  • Removing duplicates (within a given tolerance) from a Numpy array of vectors

    - by Brendan
    I have an Nx5 array containing N vectors of form 'id', 'x', 'y', 'z' and 'energy'. I need to remove duplicate points (i.e. where x, y, z all match) within a tolerance of say 0.1. Ideally I could create a function where I pass in the array, columns that need to match and a tolerance on the match. Following this thread on Scipy-user, I can remove duplicates based on a full array using record arrays, but I need to just match part of an array. Moreover this will not match within a certain tolerance. I could laboriously iterate through with a for loop in Python but is there a better Numponic way?

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  • How does the default Camera iPhone app manages to save a photo so fast?

    - by worriorbg
    Hello everyone. So far I've managed to create an app for iPhone that takes multiple images with about a 3 second interval between each. I`m processing each image in a separate thread asynchronously and everything is great till it gets to the moment for saving the image on the iPhone disk. Then it takes about 12 seconds to save the image to the disk using JPEG representation. How does Apple do it, how do they manage to save a single image so fast to the disk is there a trick they are using? I saw that the animations distract the user for a while, but still the time needed is below 12 seconds! Thanks in advance.

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  • what are your biggest complaints about TFS as source-control?

    - by jcollum
    I've used TFS for about 18 months now and I'm really not excited about it. It seems like the worst of the current versions of SCMs on the market. I think this thread will help people decide if TFS is for them vs. other source control systems. While TFS does a lot more than that, I think that source control is so critical to software development that any system (or combination thereof) that you pick needs to consider source control first. So, feel free to sound off. Maybe it'll make us feel better and be informative at the same time.

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  • iPodMusicPlayer doesn't send notifications, if it is created in background

    - by Aleksejs
    If iPodMusicPlayer is created in background, then I doesn't send notifications about playback state changes. Here is code: - (void)initMusicPlayer { musicPlayer = [MPMusicPlayerController iPodMusicPlayer]; NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter]; [notificationCenter addObserver:self selector:@selector(musicPlayerStateChanged:) name:MPMusicPlayerControllerNowPlayingItemDidChangeNotification object:musicPlayer]; [notificationCenter addObserver:self selector:@selector(musicPlayerStateChanged:) name:MPMusicPlayerControllerPlaybackStateDidChangeNotification object:musicPlayer]; [musicPlayer beginGeneratingPlaybackNotifications]; } - (void)viewDidLoad { [self performSelectorInBackground:@selector(initMusicPlayer) withObject:nil]; } Is there some way how to create iPodMusicPlayer in background? Otherwise if it is created on the main thread, it blocks executions for a while.

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  • Is select() Ok to implemnet single socket read/write timeout ?

    - by chmike
    I have an application processing network communication with blocking calls. Each thread manages a single connection. I've added a timeout on the read and write operation by using select prior to read or write on the socket. Select is known to be inefficient when dealing with large number of sockets. But is it ok, in term of performance to use it with a single socket or are there more efficient methods to add timeout support on single sockets calls ? The benefit of select is to be portable.

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  • How do I get the response time from a jQuery ajax call?

    - by Dumpen
    So I am working on tool that can show long a request to a page is taking. I am doing this by using jQuery Ajax (http://api.jquery.com/jQuery.ajax/) and I want to figure out the best way to get the response time. I found a thread (http://forum.jquery.com/topic/jquery-get-time-of-ajax-post) which describes using the "Date" in JavaScript, but is this method really reliable? An example of my code could be this below $.ajax({ type: "POST", url: "some.php", }).done(function () { // Here I want to get the how long it took to load some.php and use it further });

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  • how to open alert dialog box for second time without running program 2nd time?

    - by Shahjada Mohsinkhan mohsinkhan
    In my program I have used an alert dialog box on onclick event. But after running my program on event onclick the alert dialog box opens and allows filling information in it. and then on click of ok button alert dialog if condition is matched than data will be submitted and intent will pass otherwise in toast msg it will show something like enter correct password or loginid etc. but when on second click of button on which I have set alertdialogbox the thread msg will appear and it will close the program so what is the solution for this. Hope for your concern. Thanking you

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  • Sending while recieving in C

    - by Spidfire
    Ive made a piece of code in whats on my server, the problem is that it doesnt send while im recieving? so if i send something to client 1 to client 2, client2 only recieves if he sends something himself.. how can i solve this ? /* Thread*/ while (! stop_received) { nr_bytes_recv = recv(s, buffer, BUFFSIZE, 0); if(strncmp(buffer, "SEND", 4) == 0) { char *message = "Text asads \n"; rv = send(users[0].s, message, strlen(message), 0); rv = send(users[1].s, message, strlen(message), 0); if (rv < 0) { perror("Error sending"); exit(EXIT_FAILURE); } }else{ char *message = "Unknown command \n"; rv = send(s, message, strlen(message), 0); if (rv < 0) { perror("Error sending"); exit(EXIT_FAILURE); } } }

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