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  • Stand-alone Bytecode Verifier

    - by HH
    In my bytecode instrumentation project, I stumble frequently on VerifyErrors. However, the default java Verifier gives little information on which instruction resulted in the error (it only gives the method and a small message). Is there any stand-alone bytecode verifier which provides with a little more advanced help in locating the error, at least the precise instruction location? Thank you.

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  • slicing up a very big jpg map image , 49000* 34300 pixel

    - by sirvan
    hi i want to write a mapviewer, i must to work small tile of big map image file and there is need to tiling the big image, the problem now is to tiling big image to small tiles (250 * 250 pixel or like this size) so on, i used ImageMagic program to do it but there was problem now is any other programing method or application that do tiling? can i do it with JAI in java? how?

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  • Advice on logic circuits and serial communications

    - by Spencer Ruport
    As far as I understand the serial port so far, transferring data is done over pin 3. As shown here: There are two things that make me uncomfortable about this. The first is that it seems to imply that the two connected devices agree on a signal speed and the second is that even if they are configured to run at the same speed you run into possible synchronization issues... right? Such things can be handled I suppose but it seems like there must be a simpler method. What seems like a better approach to me would be to have one of the serial port pins send a pulse that indicates that the next bit is ready to be stored. So if we're hooking these pins up to a shift register we basically have: (some pulse pin)-clk, tx-d Is this a common practice? Is there some reason not to do this? EDIT Mike shouldn't have deleted his answer. This I2C (2 pin serial) approach seems fairly close to what I did. The serial port doesn't have a clock you're right nobugz but that's basically what I've done. See here: private void SendBytes(byte[] data) { int baudRate = 0; int byteToSend = 0; int bitToSend = 0; byte bitmask = 0; byte[] trigger = new byte[1]; trigger[0] = 0; SerialPort p; try { p = new SerialPort(cmbPorts.Text); } catch { return; } if (!int.TryParse(txtBaudRate.Text, out baudRate)) return; if (baudRate < 100) return; p.BaudRate = baudRate; for (int index = 0; index < data.Length * 8; index++) { byteToSend = (int)(index / 8); bitToSend = index - (byteToSend * 8); bitmask = (byte)System.Math.Pow(2, bitToSend); p.Open(); p.Parity = Parity.Space; p.RtsEnable = (byte)(data[byteToSend] & bitmask) > 0; s = p.BaseStream; s.WriteByte(trigger[0]); p.Close(); } } Before anyone tells me how ugly this is or how I'm destroying my transfer speeds my quick answer is I don't care about that. My point is this seems much much simpler than the method you described in your answer nobugz. And it wouldn't be as ugly if the .Net SerialPort class gave me more control over the pin signals. Are there other serial port APIs that do?

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  • Faster Matrix Multiplication in C#

    - by Kyle Lahnakoski
    I have as small c# project that involves matrices. I am processing large amounts of data by splitting it into n-length chunks, treating the chucks as vectors, and multiplying by a Vandermonde** matrix. The problem is, depending on the conditions, the size of the chucks and corresponding Vandermonde** matrix can vary. I have a general solution which is easy to read, but way too slow: public byte[] addBlockRedundancy(byte[] data) { if (data.Length!=numGood) D.error("Expecting data to be just "+numGood+" bytes long"); aMatrix d=aMatrix.newColumnMatrix(this.mod, data); var r=vandermonde.multiplyBy(d); return r.ToByteArray(); }//method This can process about 1/4 megabytes per second on my i5 U470 @ 1.33GHz. I can make this faster by manually inlining the matrix multiplication: int o=0; int d=0; for (d=0; d<data.Length-numGood; d+=numGood) { for (int r=0; r<numGood+numRedundant; r++) { Byte value=0; for (int c=0; c<numGood; c++) { value=mod.Add(value, mod.Multiply(vandermonde.get(r, c), data[d+c])); }//for output[r][o]=value; }//for o++; }//for This can process about 1 meg a second. (Please note the "mod" is performing operations over GF(2^8) modulo my favorite irreducible polynomial.) I know this can get a lot faster: After all, the Vandermonde** matrix is mostly zeros. I should be able to make a routine, or find a routine, that can take my matrix and return a optimized method which will effectively multiply vectors by the given matrix, but faster. Then, when I give this routine a 5x5 Vandermonde matrix (the identity matrix), there is simply no arithmetic to perform, and the original data is just copied. ** Please note: What I use the term "Vandermonde", I actually mean an Identity matrix with some number of rows from the Vandermonde matrix appended (see comments). This matrix is wonderful because of all the zeros, and because if you remove enough rows (of your choosing) to make it square, it is an invertible matrix. And, of course, I would like to use this same routine to convert any one of those inverted matrices into an optimized series of instructions. How can I make this matrix multiplication faster? Thanks! (edited to correct my mistake with Vandermonde matrix)

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  • CustomRenderer for AutoComplete using google closure library

    - by Paul
    I'm looking to use one of the AutoComplete subclasses(Rich,Remote,RichRemote) and I'd like to use a CustomRenderer, however I don't see instructions for this and reading the documentation/source it appears that the Remote subclass is instantiated with a renderer of "var renderer = new goog.ui.AutoComplete.Renderer();" leaving me no option to change it while instantiating. Is there a setRenderer method on the AutoComplete base class similar to that on the goog.ui.Controls classes? Thanks, Paul

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  • Scroll to selection in an ExtJS Grid

    - by dave
    Hey, i need to be able to scroll my ExtJS grid to the current selection but have no idea how to do this. I came across a reference in a forum to an ensureVisible method but can find no information. Can anyone make any suggestions? Thanks

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  • stack.ToList() in .NET - order of elements?

    - by James M.
    When using the .ToList() extension method on a Stack<T>, is the result the same as popping each element and adding to a new list (reverse of what was pushed)? If so, is this because it really is iterating over each element, or does it store the elements in reverse internally and slip the array into a new List<T>?

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  • Jquery request download/open file to the user

    - by CoffeeCode
    I have a Url that returns a file. How should my jquery request looklike to download this file to the user?? the action method looks like this public FileContentResult GetFile(int Id) { if (Id == 0) return File(new byte[0], ""); Survey survey = Repository.GetItem(Id); return File(survey.File.FileContent.ToArray(), survey.File.ContentType, survey.File.Name); }

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  • Saving webpage content using webbrowser IHTMLDocument interface

    - by Ramanand Bhat
    Hi, We need to save the complete web page including img, javascript, css and html using ATL webbrowser (IHTMLDocument) control, using IHTMLDocument2::get_all() method we have saved .html file but now how do we get external files such as .css, javascript and image files please help us with methods that internet explorer or firefox used to save the web page locally. Thanks, Ramanand.

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  • where to set wait cursor in long operation in MVP pattern?

    - by Benny
    For a long operation that will be executed in presenter, where to set the wait cursor? in View? the view shouldn't know too much about business logic, it is passive. in presenter? seems odd in presenter to call UI code. add method to View interface, like SetWait(bool), and call it in presenter? So what do you think?

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  • Rotate webpage via code?

    - by Adam Davis
    I'm hoping that there's a relatively simple way to rotate a webpage a little bit, 30 degrees or so, while still leaving it fully functional and usable. I completely control the page, and can modify it to make this easier if needed. I'd rather not re-write the whole thing in SVG, though, but perhaps javascript and canvas will work? Is there a way using CSS, Javascript, or some other cross browser method that would allow me to accomplish this?

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  • how can I prevent my SESSION to be overwritten on pageLoad of my MasterPage

    - by Darkyo
    I'm new to asp world, and I have to keep my new job :) Switching form php to asp.net 3.5 (never used before). What would be the best practice for storing a SESSION variable in my project ? How can I prevent my SESSION to be overwritten if my initialisation code is in the onPageLoad method of my MasterPage ? My variables keeps beeing overwritten, please someone help me and tell me if there is any other solution than dealing with this pageLoad problem. Thank you all

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  • Silverlight changes the io.Stream to byte[]

    - by Sai
    I have created a WCF service for uploading images , which accepts System.IO.Stream as input parameter and am using streaming. When I added the service reference in Silverlight project then it automatically changed the parameter of my WCF method from System.IO.Stream to byte[]. Can anyone suggest if there is a way around this so that I can get System.IO.Stream type rather than byte[]. Thanks in advance

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  • Help regarding C# thread pool

    - by Matt
    I have a method that gets called quite often, with text coming in as a parameter.. I'm looking at creating a thread pool that checks the line of text, and performs actions based on that.. Can someone help me out with the basics behind creating the thread pool and firing off new threads please? This is so damn confusing..

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  • How to parse xml string in iphone 2.0

    - by MaheshBabu
    Hi folks, I am getting information (id,name,address) in the form of xml string form the .net web server. i am using NSXMlparsing to parse this xml string in iphone os 4.0. Now i need to do the same application in iphone os 2.0. i found Nsxmlparsing delegate should work on 4.0 and later. Can any one please suggest which method is suitable to parse xml string and sample tutorial. Thank u in advance.

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  • creating an executable file without a compiler

    - by Alterlife
    I came across an article a long while ago on how to write out a .com file directly without using any external tools. the method was to basically copy con myfile.com and then hit ctrl+alt+number for each instruction. I've lost the url for the guide... Google isn't helping much either. If you have the link, please could you post it.

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  • Displaying a message in a dialog box using AJAX, jQuery, and CakePHP

    - by LainIwakura
    I have a form, and when users submit this form, it should pass the data along to a function using AJAX. Then, the result of that is displayed to the user in a dialog box. I'm using CakePHP (1.3) and jQuery to try and accomplish this but I feel like I'm running into the ground. The form will eventually be used for uploading images with tags, but for now I just want to see a message pop up in the box.. The form: <?php echo $this->Form->create('Image', array('type' => 'file', 'controller' => 'images', 'action' => 'upload', 'method' => 'post')); echo $this->Form->input('Wallpaper', array('type' => 'file')); echo $this->Form->input('Tags'); echo $this->Form->end('Upload!'); ?> The AJAX: $(document).ready(function() { $("#ImageUploadForm").submit(function() { $.ajax({ type: "POST", url: "/images/upload/", data: $(this).serialize(), async: false, success: function(html){ $("#dialog-modal").dialog({ $("#dialog-modal").append("<p>"+html+"</p>"); height: 140, modal: true, buttons: { Ok: function() { $(this).dialog('close'); } } }) } }); return false; }); }); NOTE: if I put $("#dialog-modal").dialog({ height: 140, modal: true }); OUTSIDE of the $.ajax but inside the $("#ImageUploadForm").submit(function() { and comment out the $.ajax stuff, I WILL see a dialog box pop up and then I have to click it for it to go away. After this, it will not forward to the location /images/upload/ The method that AJAX calls: public function upload() { $this->autoRender = false; if ($this->RequestHandler->isAjax()) { echo 'Hi!'; exit(); } } $this-RequestHandler-isAjax() seems to do either absolutely nothing, or it is always returning false. I have never entered an if statement with that as the condition. Thanks for all the help, if you need more information let me know.

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  • Create certificate for a client app in .NET

    - by galets
    I'm looking for a server app to be routinely generating certificates for client applications using self-signed root. Is there any streamlined process in .NET to programmatically generate those certificates? I can, of course, keep spawning makecert or openssl, but I was looking for more programmatic, in-memory method, when you just get X509Certificate on output. If someone got a code snippet, can you please share?

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  • A question about Scala Objects

    - by Randin
    In the example for coding with Json using Databinder Dispatch Nathan uses an Object (Http) without a method, shown here: import dispatch._ import Http._ Http("http://www.fox.com/dollhouse/" >>> System.out ) How is he doing this?

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