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Articles indexed in March 2010

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  • Java Heap Overflow, Forcing Garbage Collection

    - by Nicholas
    I've create a trie tree with an array of children. When deleting a word, I set the children null, which I would assume deletes the node(delete is a relative term). I know that null doesn't delete the child, just sets it to null, which when using a large amount of words it causes to overflow the heap. Running a top on linux, I can see my memory usage spike to 1gb pretty quickly, but if I force garbage collection after the delete (Runtime.gc()) the memory usage goes to 50mb and never above that. From what I'm told, java by default runs garbage collection before a heap overflow happens, but I can't see to make that happen.

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  • what's a good way to implement something that looks like Dictionary<string, string, Dictionary<strin

    - by jcollum
    I've got a data structure that is Key, Value, OtherValues(key, Value). So the OtherValues are attached to the first Key and aren't always there. I can do this as Dictionary<Key, ValueAndListOfOptionalValues> where ValueAndListOfOptionalValues is a class with a string and a Dictionary<string, string>. I'm wondering if that's really the best way to do it? Sometimes I think that I'm missing some important classes in the Generics namespace, maybe there are better classes out there that I'm not aware of.

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  • RegEx - How To Insert String Before File Extension

    - by st4ck0v3rfl0w
    Hi All, How would I insert "_thumb" into files that are being dyanmically generated. For example, I have a site that allows users to upload an image. The script takes the image, optimizes it and saves to file. How would I make it insert the string "_thumb" for the optimized image? I'm currently saving 1 version of the otpimized file. ch-1268312613-photo.jpg I want to save the original as the above string, but want to append, "_thumb" like the following string ch-1268312613-photo_thumb.jpg

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  • Is there a better way to throttle a high throughput job?

    - by ChaosPandion
    I created a simple class that shows what I am trying to do without any noise. Feel free to bash away at my code. That's why I posted it here. public class Throttled : IDisposable { private readonly Action work; private readonly Func<bool> stop; private readonly ManualResetEvent continueProcessing; private readonly Timer throttleTimer; private readonly int throttlePeriod; private readonly int throttleLimit; private int totalProcessed; public Throttled(Action work, Func<bool> stop, int throttlePeriod, int throttleLimit) { this.work = work; this.stop = stop; this.throttlePeriod = throttlePeriod; this.throttleLimit = throttleLimit; continueProcessing = new ManualResetEvent(true); throttleTimer = new Timer(ThrottleUpdate, null, throttlePeriod, throttlePeriod); } public void Dispose() { throttleTimer.Dispose(); ((IDisposable)continueProcessing).Dispose(); } public void Execute() { while (!stop()) { if (Interlocked.Increment(ref totalProcessed) > throttleLimit) { lock (continueProcessing) { continueProcessing.Reset(); } if (!continueProcessing.WaitOne(throttlePeriod)) { throw new TimeoutException(); } } work(); } } private void ThrottleUpdate(object state) { Interlocked.Exchange(ref totalProcessed, 0); lock (continueProcessing) { continueProcessing.Set(); } } }

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  • how to drag a 'div' element to the google maps ,that be changed to a 'marker'..use jquery

    - by zjm1126
    this is my code : <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no"> </head> <body onload="initialize()" onunload="GUnload()"> <style type="text/css"> </style> <div id="map_canvas" style="width: 500px; height: 300px;float:left;"></div> <div id=b style="width: 50px; height: 50px;background:red;float:left;margin-left:300px;"></div> <script src="jquery-1.4.2.js" type="text/javascript"></script> <script src="jquery-ui-1.8rc3.custom.min.js" type="text/javascript"></script> <script src="http://ditu.google.cn/maps?file=api&amp;v=2&amp;key=ABQIAAAA-7cuV3vqp7w6zUNiN_F4uBRi_j0U6kJrkFvY4-OX2XYmEAa76BSNz0ifabgugotzJgrxyodPDmheRA&sensor=false"type="text/javascript"></script> <script type="text/javascript"> //********** function initialize() { if (GBrowserIsCompatible()) { // function createMarker(point, number) { var marker = new GMarker(point); var message = ["?","?","?","??","??"]; marker.value = number; GEvent.addListener(marker, "click", function() { var myHtml = "<b>#" + number + "</b><br/>" + message[number -1]; map.openInfoWindowHtml(point, myHtml); }); return marker; } // var map = new GMap2(document.getElementById("map_canvas")); map.setCenter(new GLatLng(39.9493, 116.3975), 13); // Add 5 markers to the map at random locations var bounds = map.getBounds(); var southWest = bounds.getSouthWest(); var northEast = bounds.getNorthEast(); var lngSpan = northEast.lng() - southWest.lng(); var latSpan = northEast.lat() - southWest.lat(); for (var i = 0; i < 5; i++) { var point = new GLatLng(southWest.lat() + latSpan * Math.random(), southWest.lng() + lngSpan * Math.random()); map.addOverlay(createMarker(point, i + 1)); } } } //************* $("#b").draggable(); </script> </body> </html>

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  • NLP - Word Alignment

    - by mgj
    Hi..:) I am looking for word alignment tools and algorithms, I am dealing with bilingual English - Hindi text, Currently I am working on DTW(Dynamic Time Warping) algorithm, CLA(Competitive Linking Algorithm) , NATool, Giza++. Could you please suggest me any other alogrithm/tool which is language independent which could achieve Statistical word alignment for parallel English Hindi Corpora and its Evaluation, some tools languages are best for certain languages.. Could one please tell me how true is that and if so could you please give me an example what would suite better for Asian languages like Hindi and what shouldn't I use for such languages. I have heard a bit about uplug word aligner.. could one tell me if I could use it as a tool for my purpose. Thank you.. :)

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  • TFS 2010 build template failing to open in designer - how to fix?

    - by Duncan Bayne
    I can open the DefaultTemplate.xaml that was installed as part of our TFS 2010 RC setup. I created a copy of this template called ApplicationTemplate.xaml and modified it slightly, using the workflow designer in Visual Studio. Now, I can no longer open ApplicationTemplate.xaml. When I try, I receive many errors like the following: Error 2 Assembly 'Microsoft.TeamFoundation.Build.Client' was not found. Verify that you are not missing an assembly reference. Also, verify that your project and all referenced assemblies have been built. C:\Projects\tfs\Hydraulics\BuildProcessTemplates\ApplicationTemplate.xaml 1 1828 Miscellaneous Files However, I can still open and edit the DefaultTemplate.xaml file without any issues. Has anyone else come across this problem, & if so, did you manage to resolve it or did you have to recreate the template?

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  • Can anybody explain the code

    - by girinie
    class giri{ public static void main(String args[]) { int x = 17; int y = 013; System.out.println("x+y = " + x+y); } } When I run the program I get the output 1711. Can anybody tell me How do I get 1711

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  • how to run existing ant script from groovy

    - by Omnipresent
    my build is a 3 step process. run ant to build. transfer war to server. touch reload file. I have transfered last two steps in groovy, using antbuilder. However, I am not able to run my existing ant script using groovy. Usually I run it using the following command in dos prompt: ant -Dsystem=mysystem -DsomeotherOption=true from groovy when I try to do "ant -Dsystem=mysystem -DsomeotherOption=true".execute() it gives an error saying ant is not a recognized command. How can I utilize my existing ant script in groovy?

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  • Notebook Review: Lenovo ThinkPad T410

    A notebook computer with desktop performance isn't unprecedented, but it's rare to see one in such a trim (14.1 inches, five pounds) package. We explore the elegant engineering of Lenovo's mainstream enterprise laptop.

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  • Survey of MySQL Storage Engines

    <b>Database Journal:</b> "MySQL has an interesting architecture that sets it apart from some other enterprise database systems. It allows you to plug in different modules to handle storage. What that means to end users is that it is quite flexible, offering an interesting array of different storage engines with different features, strengths, and tradeoffs."

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  • SCALE 8x: Color management for everyone

    <b>LWN.net:</b> "Color management is sometimes unfairly characterized as a topic of interest only to print shops and video editors, but as Cruz explained at the top of his talk, anyone who shares digital content wants it to look correct, and everyone who uses more than one device knows how tricky that can be."

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