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• How to Read a specific element value from XElement in LINQ to XML

  - by Happy

  I have an XElement which has content like this. <Response xmlns="someurl" xmlnsLi="thew3url"> <ErrorCode></ErrorCode> <Status>Success</Status> <Result> <Manufacturer> <ManufacturerID>46</ManufacturerID> <ManufacturerName>APPLE</ManufacturerName> </Manufacturer> //More Manufacturer Elements like above here </Result> </Response> How will i read the Value inside Status element ? I tried XElement stats = myXel.Descendants("Status").SingleOrDefault(); But that is returning null.

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• Read external HTML page and then find data within

  - by inthewayboy

  I'm playing around with an idea, and I'm stuck at this one part. I want to read an external HTML page and then extract the data held within two <dd> tags. I've been using file_get_contents with good results, but I'm at a loss as to how to accomplish that last part. The two tags I want to extract the value from are always enclosed within a particular <div>, was wondering if that might help? In my mind it reads the entire html file into a string, then dumps all the data up until this one particular <div>, and dumps all the data after the closing </div>. Is that possible? I think this needs regex syntax which I've never used yet. So any tips, links, or examples would be great! I can provide more info as necessary.

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• Linq to XML Read and output XML generated from lookup list

  - by Greg S

  I am trying to use XML created from a lookup list in SharePoint as a datasource for a treeview. It is in the form of : <NewDataSet> <test_data> <ID>1</ID> <Title>MenuItem_1</Title> <child_of /> </test_data> <test_data> <ID>2</ID> <Title>Subitem_1</Title> <Action>http://www.google.com</Action> <child_of>MenuItem_1</child_of> </test_data> <test_data> <ID>3</ID> <Title>Subitem_2</Title> <Action>http://www.google.com</Action> <child_of>MenuItem_1</child_of> </test_data> <test_data> <ID>4</ID> <Title>MenuItem_2</Title> <child_of /> </test_data> <test_data> <ID>5</ID> <Title>Subitem_2_1</Title> <Action>http://www.google.com</Action> <child_of>MenuItem_2</child_of> </test_data> <test_data> <ID>6</ID> <Title>Subitem_2_2</Title> <Action>http://www.google.com</Action> <child_of>MenuItem_2</child_of> </test_data> <test_data> <ID>7</ID> <Title>Subitem_2_2_1</Title> <Action>http://www.google.com</Action> <child_of>Subitem_2_2</child_of> </test_data> </NewDataSet> There may be N tiers, but the items relate to the parent via the <child_of> element. I can't seem to figure out how to write the LINQ in C# to nest the menu items properly. A friend recommended I post here. Any help is greatly appreciated.

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• How to write this JavaScript code without eval?

  - by karlthorwald

  How to write this JavaScript code without eval? var typeOfString = eval("typeof " + that.modules[modName].varName); if (typeOfString !== "undefined") { doSomething(); } The point is that the name of the var that I want to check for is in a string. Maybe it is simple but I don't know how. Edit: Thank you for the very interesting answers so far. I will follow your suggestions and integrate this into my code and do some testing and report. Could take a while. Edit2: I had another look at the could and maybe itis better I show you a bigger picture. I am greatful for the experts to explain so beautiful, it is better with more code: MYNAMESPACE.Loader = ( function() { function C() { this.modules = {}; this.required = {}; this.waitCount = 0; this.appendUrl = ''; this.docHead = document.getElementsByTagName('head')[0]; } function insert() { var that = this; //insert all script tags to the head now! //loop over all modules: for (var modName in this.required) { if(this.required.hasOwnProperty(modName)){ if (this.required[modName] === 'required') { this.required[modName] = 'loading'; this.waitCount = this.waitCount + 1; this.insertModule(modName); } } } //now poll until everything is loaded or //until timout this.intervalId = 0; var checkFunction = function() { if (that.waitCount === 0) { clearInterval(that.intervalId); that.onSuccess(); return; } for (var modName in that.required) { if(that.required.hasOwnProperty(modName)){ if (that.required[modName] === 'loading') { var typeOfString = eval("typeof " + that.modules[modName].varName); if (typeOfString !== "undefined") { //module is loaded! that.required[modName] = 'ok'; that.waitCount = that.waitCount - 1; if (that.waitCount === 0) { clearInterval(that.intervalId); that.onSuccess(); return; } } } } } }; //execute the function twice a second to check if all is loaded: this.intervalId = setInterval(checkFunction, 500); //further execution will be in checkFunction, //so nothing left to do here } C.prototype.insert = insert; //there are more functions here... return C; }()); var myLoader = new MYNAMESPACE.Loader(); //some more lines here... myLoader.insert();

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• Can't read excel file after creating it using File.WriteAllText() function

  - by Srikanth Mattihalli

  public void ExportDataSetToExcel(DataTable dt) { HttpResponse response = HttpContext.Current.Response; response.Clear(); response.Charset = "utf-8"; response.ContentEncoding = Encoding.GetEncoding("utf-8"); response.ContentType = "application/vnd.ms-excel"; Random Rand = new Random(); int iNum = Rand.Next(10000, 99999); string extension = ".xls"; string filenamepath = AppDomain.CurrentDomain.BaseDirectory + "graphs\\" + iNum + ".xls"; string file_path = "graphs/" + iNum + extension; response.AddHeader("Content-Disposition", "attachment;filename=\"" + iNum + "\""); string query = "insert into graphtable(graphtitle,graphpath,creategraph,year) VALUES('" + iNum.ToString() + "','" + file_path + "','" + true + "','" + DateTime.Now.Year.ToString() + "')"; try { int n = connect.UpdateDb(query); if (n > 0) { resultLabel.Text = "Merge Successfull"; } else { resultLabel.Text = " Merge Failed"; } resultLabel.Visible = true; } catch { } using (StringWriter sw = new StringWriter()) { using (HtmlTextWriter htw = new HtmlTextWriter(sw)) { // instantiate a datagrid DataGrid dg = new DataGrid(); dg.DataSource = dt; //ds.Tables[0]; dg.DataBind(); dg.RenderControl(htw); File.WriteAllText(filenamepath, sw.ToString()); // File.WriteAllText(filenamepath, sw.ToString(), Encoding.UTF8); response.Write(sw.ToString()); response.End(); } } } Hi all, I have created an excel sheet from datatable using above function. I want to read the excel sheet programatically using the below connectionstring. This string works fine for all other excel sheets but not for the one i created using the above function. I guess it is because of excel version problem. OleDbConnection conn= new OleDbConnection("Data Source='" + path +"';provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;";); Can anyone suggest a way by which i can create an excel sheet such that it is readable again using above query. I cannot use Microsoft InterOp library as it is not supported by my host.

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• Ajax to read updated values from XML

  - by punit

  I am creating file upload progress bar. I have a CGI script which copies the data, and here I increment the progress bar value by ONE after certain iterations. I am storing the incremented value in XML file (I also tried using plain text file). On the other side I have ajax reading incremented value from xml and depending on that it increments the DIV element. However, what happens here is, it seems to me that although the ajax reads all the incremented values but it processes it after the CGI has finished execution. That is progress bar starts execution once the file copying and other stuff in CGI is completed. My code is: AJAX:::: function polling_start() { //GETS CALLED WHEN USER HITS FILE UPLOAD BUTTON intervalID = window.setInterval(send_request,100); } window.onload = function (){ request = initXMLHttpClient(); request.overrideMimeType('text/xml'); progress = document.getElementById('progress'); } function initXMLHttpClient() { if (window.XMLHttpRequest){ // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp = new XMLHttpRequest(); } else{ // code for IE6, IE5 xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } return xmlhttp } function send_request() { request.open("GET","progress_bar.xml",true); request.onreadystatechange = request_handler; request.send(); } function request_handler() { if (request.readyState == 4 && request.status == 200) { var level=request.responseXML.getElementsByTagName('PROGRESS')[0].firstChild; progress.style.width = progress.innerHTML = level.nodeValue + '%'; progress.style.backgroundColor = "green"; } } /****ON SERVER SIDE*********/ char xmlDat1[] = "<DOCUMENT><PROGRESS>"; char xmlDat2[] = "</PROGRESS></DOCUMENT>"; fptr = fopen("progress_bar.xml", "w"); .........OTHER STUFF.............................. ................................. if(i == inc && j<=100) { fprintf(fptr, "%s\n", "\n\n\n]"); //fprintf(fptr, "%s\n", ""); fprintf(fptr, "%s", xmlDat1); // fprintf(fptr, "%d" ,j); fprintf(fptr, "%s" ,xmlDat2); fseek(fptr, 0, SEEK_SET); /*fprintf(fptr, "%d" ,j); fseek(fptr, 0, SEEK_SET);*/ i = 0; //sleep(1); j++; } (I also tried to write in .text, but same response) Any quick response would be appreciable.

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• Event sourcing: Write event before or after updating the model

  - by Magnus

  I'm reasoning about event sourcing and often I arrive at a chicken and egg problem. Would be grateful for some hints on how to reason around this. If I execute all I/O-bound processing async (ie writing to the event log) then how do I handle, or sometimes even detect, failures? I'm using Akka Actors so processing is sequential for each event/message. I do not have any database at this time, instead I would persist all the events in an event log and then keep an aggregated state of all the events in a model stored in memory. Queries are all against this model, you can consider it to be a cache. Example Creating a new user: Validate that the user does not exist in model Persist event to journal Update model (in memory) If step 3 breaks I still have persisted my event so I can replay it at a later date. If step 2 breaks I can handle that as well gracefully. This is fine, but since step 2 is I/O-bound I figured that I should do I/O in a separate actor to free up the first actor for queries: Updating a user while allowing queries (A0 = Front end/GUI actor, A1 = Processor Actor, A2 = IO-actor, E = event bus). (A0-E-A1) Event is published to update user 'U1'. Validate that the user 'U1' exists in model (A1-A2) Persist event to journal (separate actor) (A0-E-A1-A0) Query for user 'U1' profile (A2-A1) Event is now persisted continue to update model (A0-E-A1-A0) Query for user 'U1' profile (now returns fresh data) This is appealing since queries can be processed while I/O-is churning along at it's own pace. But now I can cause myself all kinds of problems where I could have two incompatible commands (delete and then update) be persisted to the event log and crash on me when replayed up at a later date, since I do the validation before persisting the event and then update the model. My aim is to have a simple reasoning around my model (since Actor processes messages sequentially single threaded) but not be waiting for I/O-bound updates when Querying. I get the feeling I'm modeling a database which in itself is might be a problem. If things are unclear please write a comment.

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• HttpURLConnection does not read the whole respnse

  - by Peter Szanto

  I use HttpURLConnection to do HTTP POST but I dont always get back the full response. I wanted to debug the problem, but when I step through each line it worked. I thought it must be a timing issue so I added Thread.sleep and it really made my code work, but this is only a temporary workaround. I wonder why is this happening and how to solve. Here is my code: URL u = new URL(url); URLConnection c = u.openConnection(); InputStream in = null; String mediaType = null; if (c instanceof HttpURLConnection) { //c.setConnectTimeout(1000000); //c.setReadTimeout(1000000); HttpURLConnection h = (HttpURLConnection)c; h.setRequestMethod("POST"); //h.setChunkedStreamingMode(-1); setAccept(h, expectedMimeType); h.setRequestProperty("Content-Type", inputMimeType); for(String key: httpHeaders.keySet()) { h.setRequestProperty(key, httpHeaders.get(key)); if (logger.isDebugEnabled()) { logger.debug("Request property key : " + key + " / value : " + httpHeaders.get(key)); } } h.setDoOutput(true); h.connect(); OutputStream out = h.getOutputStream(); out.write(input.getBytes()); out.close(); mediaType = h.getContentType(); logger.debug(" ------------------ sleep ------------------ START"); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } logger.debug(" ------------------ sleep ------------------ END"); if (h.getResponseCode() < 400) { in = h.getInputStream(); } else { in = h.getErrorStream(); } It genearates the following HTTP headers POST /emailauthentication/ HTTP/1.1 Accept: application/xml Content-Type: application/xml Authorization: OAuth oauth_consumer_key="b465472b-d872-42b9-030e-4e74b9b60e39",oauth_nonce="YnDb5eepuLm%2Fbs",oauth_signature="dbN%2FWeWs2G00mk%2BX6uIi3thJxlM%3D", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1276524919", oauth_token="", oauth_version="1.0" User-Agent: Java/1.6.0_20 Host: test:6580 Connection: keep-alive Content-Length: 1107 In other posts it was suggested to turn off keep-alive by using the http.keepAlive=false system property, I tried that and the headers changed to POST /emailauthentication/ HTTP/1.1 Accept: application/xml Content-Type: application/xml Authorization: OAuth oauth_consumer_key="b465472b-d872-42b9-030e-4e74b9b60e39", oauth_nonce="Eaiezrj6X4Ttt0", oauth_signature="ND9fAdZMqbYPR2j%2FXUCZmI90rSI%3D", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1276526608", oauth_token="", oauth_version="1.0" User-Agent: Java/1.6.0_20 Host: test:6580 Connection: close Content-Length: 1107 the Connection header is "close" but I still cannot read the whole response. Any idea what do I do wrong?

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• Generate A Simple Read-Only DAL?

  - by David

  I've been looking around for a simple solution to this, trying my best to lean towards something like NHibernate, but so far everything I've found seems to be trying to solve a slightly different problem. Here's what I'm looking at in my current project: We have an IBM iSeries database as a primary repository for a third party software suite used for our core business (a financial institution). Part of what my team does is write applications that report on or key off of a lot of this data in some way. In the past, we've been manually creating ADO .NET connections (we're using .NET 3.5 and Visual Studio 2008, by the way) and manually writing queries, etc. Moving forward, I'd like to simplify the process of getting data from there for the development team. Rather than creating connections and queries and all that each time, I'd much rather a developer be able to simply do something like this: var something = (from t in TableName select t); And, ideally, they'd just get some IQueryable or IEnumerable of generated entities. This would be done inside a new domain core that I'm building where these entities would live and the applications would interface with it through a request/response service layer. A few things to note are: The entities that correspond to the database tables should be generated once and we'd prefer to manually keep them updated over time. That is, if columns/tables are added to the database then we shouldn't have to do anything. (If some are deleted, of course, it will break, but that's fine.) But if we need to use a new column, we should be able to just add it to the necessary class(es) without having to re-gen the whole thing. The whole thing should be SELECT-only. We're not doing a full DAL here because we don't want to be able to break anything in the database (even accidentally). We don't need any kind of mapping between our domain objects and the generated entity types. The domain barely covers a fraction of the data that's in there, most of it we'll never need, and we would rather just create re-usable maps manually over time. I already have a logical separation for the DAL where my "repository" classes return domain objects, I'm just looking for a better alternative to manual ADO to be used inside the repository classes. Any suggestions? It seems like what I'm doing is just enough outside the normal demand for DAL/ORM tools/tutorials online that I haven't been able to find anything. Or maybe I'm just overlooking something obvious?

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• How to write my own global lock / unlock functions for PostgreSQL

  - by rafalmag

  I have postgresql (in perlu) function getTravelTime(integer, timestamp), which tries to select data for specified ID and timestamp. If there are no data or if data is old, it downloads them from external server (downloading time ~300ms). Multiple process use this database and this function. There is an error when two process do not find data and download them and try to do an insert to travel_time table (id and timestamp pair have to be unique). I thought about locks. Locking whole table would block all processes and allow only one to proceed. I need to lock only on id and timestamp. pg_advisory_lock seems to lock only in "current session". But my processes uses their own sessions. I tried to write my own lock/unlock functions. Am I doing it right? I use active waiting, how can I omit this? Maybe there is a way to use pg_advisory_lock() as global lock? My code: CREATE TABLE travel_time_locks ( id_key integer NOT NULL, time_key timestamp without time zone NOT NULL, UNIQUE (id_key, time_key) ); ------------ -- Function: mylock(integer, timestamp) DROP FUNCTION IF EXISTS mylock(integer, timestamp) CASCADE; -- Usage: SELECT mylock(1, '2010-03-28T19:45'); -- function tries to do a global lock similar to pg_advisory_lock(key, key) CREATE OR REPLACE FUNCTION mylock(id_input integer, time_input timestamp) RETURNS void AS $BODY$ DECLARE rows int; BEGIN LOOP BEGIN -- active waiting here !!!! :( INSERT INTO travel_time_locks (id_key, time_key) VALUES (id_input, time_input); EXCEPTION WHEN unique_violation THEN CONTINUE; END; EXIT; END LOOP; END; $BODY$ LANGUAGE 'plpgsql' VOLATILE COST 1; ------------ -- Function: myunlock(integer, timestamp) DROP FUNCTION IF EXISTS myunlock(integer, timestamp) CASCADE; -- Usage: SELECT myunlock(1, '2010-03-28T19:45'); -- function tries to do a global unlock similar to pg_advisory_unlock(key, key) CREATE OR REPLACE FUNCTION myunlock(id_input integer, time_input timestamp) RETURNS integer AS $BODY$ DECLARE BEGIN DELETE FROM ONLY travel_time_locks WHERE id_key=id_input AND time_key=time_input; RETURN 1; END; $BODY$ LANGUAGE 'plpgsql' VOLATILE COST 1;

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• Write to text file using ArrayList

  - by Ugochukwutubelum Chiemenam

  The program is basically about reading from a text file, storing the current data into an ArrayList, then writing data (from user input) into the same text file. Kindly let me know where I am going wrong in this sub-part? The data inside the text file is as follows: abc t1 1900 xyz t2 1700 The compiler is showing an error at the line output.format("%s%s%s%n", public class justTesting { private Scanner input; private Formatter output; private ArrayList<Student> tk = new ArrayList<Student>(); public static void main(String[] args) { justTesting app = new justTesting(); app.create(); app.writeToFile(); } public void create() { Text entry = new Text(); Scanner input = new Scanner(System.in); System.out.printf("%s\n", "Please enter your name, ID, and year: "); while (input.hasNext()) { try { entry.setName(input.next()); entry.setTelNumber(input.next()); entry.setDOB(input.next()); for (int i = 0; i < tk.size(); i++) { output.format("%s%s%s%n", tk.get(i).getName(), tk.get(i) .getTelNumber(), tk.get(i).getDOB()); } } catch (FormatterClosedException fce) { System.err.println("Error writing to file."); return; } catch (NoSuchElementException nsee) { System.err.println("Invalid input. Try again: "); input.nextLine(); } System.out.printf("%s\n", "Please enter your name, ID, and year: "); } } public void writeToFile() { try { output = new Formatter("testing.txt"); } catch (SecurityException se) { System.err .println("You do not have write access permission to this file."); System.exit(1); } catch (FileNotFoundException fnfe) { System.err.println("Error opening or creating file."); System.exit(1); } } }

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• C# Read Byte [] to Image

  - by LucasGuitar

  I have an application which I'm adding pictures and these are automatically converted to binary and stored in a single file. how can I save several images, I keep in an XML file start and size of each set of refente to an image byte. But it has several images in bytes, whenever I try to select a different set of bytes just opening the same image. I would like your help to be able to fix this and open different images. Code //Add Image private void btAddImage_Click(object sender, RoutedEventArgs e) { OpenFileDialog op = new OpenFileDialog(); op.Title = "Selecione a Imagem"; op.Filter = "All supported graphics|*.jpg;*.jpeg;*.png|" + "JPEG (*.jpg;*.jpeg)|*.jpg;*.jpeg|" + "Portable Network Graphic (*.png)|*.png"; if (op.ShowDialog() == true) { imgPatch.Source = new BitmapImage(new Uri(op.FileName)); txtName.Focus(); } } //Convert Image private void btConvertImage_Click(object sender, RoutedEventArgs e) { if (String.IsNullOrEmpty(txtName.Text)) { txtName.Focus(); MessageBox.Show("Preencha o Nome", "Error"); } else { save(ConvertFileToByteArray(op.FileName), txtName.Text); } } //Image to Byte Array private static byte[] ConvertFileToByteArray(String FilePath) { return File.ReadAllBytes(FilePath); } //Save Binary File and XML File public void save(byte[] img, string nome) { FileStream f; long ini, fin = img.Length; if (!File.Exists("Escudos.bcf")) { f = new FileStream("Escudos.bcf", FileMode.Create); ini = 0; } else { f = new FileStream("Escudos.bcf", FileMode.Append); ini = f.Length + 1; bin = new TestBinarySegment(); } bin.LoadAddSave("Escudos.xml", "Brasileiro", nome, ini, fin); BinaryWriter b = new BinaryWriter(f); b.Write(img); b.Close(); f.Dispose(); } //Load Image from Byte private void btLoad_Click(object sender, RoutedEventArgs e) { getImageFromByte(); } //Byte to Image public void getImageFromByte(int start, int length) { using (FileStream fs = new FileStream("Escudos.bcf", FileMode.Open)) { byte[] iba = new byte[fs.Length+1]; fs.Read(iba, start, length); Image image = new Image(); image.Source = BitmapFrame.Create(fs, BitmapCreateOptions.None, BitmapCacheOption.OnLoad); imgPatch2.Source = image.Source; } }

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• can't read from stream until child exits?

  - by BobTurbo

  OK I have a program that creates two pipes - forks - the child's stdin and stdout are redirected to one end of each pipe - the parent is connected to the other ends of the pipes and tries to read the stream associated with the child's output and print it to the screen (and I will also make it write to the input of the child eventually). The problem is, when the parent tries to fgets the child's output stream, it just stalls and waits until the child dies to fgets and then print the output. If the child doesn't exit, it just waits forever. What is going on? I thought that maybe fgets would block until SOMETHING was in the stream, but not block all the way until the child gives up its file descriptors. Here is the code: #include <stdlib.h> #include <stdio.h> #include <string.h> #include <sys/types.h> #include <unistd.h> int main(int argc, char *argv[]) { FILE* fpin; FILE* fpout; int input_fd[2]; int output_fd[2]; pid_t pid; int status; char input[100]; char output[100]; char *args[] = {"/somepath/someprogram", NULL}; fgets(input, 100, stdin); // the user inputs the program name to exec pipe(input_fd); pipe(output_fd); pid = fork(); if (pid == 0) { close(input_fd[1]); close(output_fd[0]); dup2(input_fd[0], 0); dup2(output_fd[1], 1); input[strlen(input)-1] = '\0'; execvp(input, args); } else { close(input_fd[0]); close(output_fd[1]); fpin = fdopen(input_fd[1], "w"); fpout = fdopen(output_fd[0], "r"); while(!feof(fpout)) { fgets(output, 100, fpout); printf("output: %s\n", output); } } return 0; }

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• How to write php code to input jsonstring and insert to sql server

  - by Romi

  i am trying to OUTPUT a Json String from the phone and to get it uploaded to the sql server i have. I Do not know how to get the output Json and write the php code... i tried many methods but couldnt find a solution. public void post(String string) { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost( "http://www.hopscriber.com/xoxoxox/testphp.php"); try { List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); nameValuePairs.add(new BasicNameValuePair("myJson", string)); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); String str = inputStreamToString(response.getEntity().getContent()) .toString(); Log.w("SENCIDE", str); } catch (Exception e) { Toast.makeText(getBaseContext(), "notwork", Toast.LENGTH_LONG) .show(); } } private Object inputStreamToString(InputStream is) { // TODO Auto-generated method stub String line = ""; StringBuilder total = new StringBuilder(); // Wrap a BufferedReader around the InputStream BufferedReader rd = new BufferedReader(new InputStreamReader(is)); // Read response until the end try { while ((line = rd.readLine()) != null) { total.append(line); } } catch (IOException e) { e.printStackTrace(); } // Return full string return total; } it outputs a json string as [myJson=[{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"org.siislab.tutorial.permission.READ_FRIENDS","level":"Normal"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"org.siislab.tutorial.permission.WRITE_FRIENDS","level":"Normal"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"org.siislab.tutorial.permission.FRIEND_SERVICE","level":"Normal"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"org.siislab.tutorial.permission.FRIEND_NEAR","level":"Dangerous"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"org.siislab.tutorial.permission.BROADCAST_FRIEND_NEAR","level":"Normal"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"android.permission.RECEIVE_BOOT_COMPLETED","level":"Normal"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"android.permission.READ_CONTACTS","level":"Dangerous"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"android.permission.ACCESS_FINE_LOCATION","level":"Dangerous"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"android.permission.WRITE_EXTERNAL_STORAGE","level":"Dangerous"},{"name":"FriendTracker","user":"amjgp000000000000000","pack":"org.siislab.tutorial.friendtracker","perm":"android.permission.READ_PHONE_STATE","level":"Dangerous"},{"name":"Tesing","user":"amjgp000000000000000","pack":"com.example.tesing","perm":"null","level":"null"},{"name":"Action Bar","user":"amjgp000000000000000","pack":"name.brucephillips.actionbarexample","perm":"null","level":"null"},.......

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• Improving performance for WRITE operation on Oracle DB in Java

  - by Lucky

  I've a typical scenario & need to understand best possible way to handle this, so here it goes - I'm developing a solution that will retrieve data from a remote SOAP based web service & will then push this data to an Oracle database on network. Also, this will be a scheduled task that will execute every 15 minutes. I've event queues on remote service that contains the INSERT/UPDATE/DELETE operations that have been done since last retrieval, & once I retrieve the events for last 15 minutes, it again add events for next retrieval. Now, its just pushing data to Oracle so all my interactions are INSERT & UPDATE statements. There are around 60 tables on Oracle with some of them having 100+ columns. Moreover, for every 15 minutes cycle there would be around 60-70 Inserts, 100+ Updates & 10-20 Deletes. This will be an executable jar file that will terminate after operation & will again start on next 15 minutes cycle. So, I need to understand how should I handle WRITE operations (best practices) to improve performance for this application as whole ? Current Test Code (on every cycle) - Connects to remote service to get events. Creates a connection with DB (single connection object). Identifies the type of operation (INSERT/UPDATE/DELETE) & table on which it is done. After above, calls the respective method based on type of operation & table. Uses Preparedstatement with positional parameters, & retrieves each column value from remote service & assigns that to statement parameters. Commits the statement & returns to get event class to process next event. Above is repeated till all the retrieved events are processed after which program closes & then starts on next cycle & everything repeats again. Thanks for help !

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• Regular Expressions. Remember it, write it, test it.

  - by outcoldman

  I should say that I’m fan of regular expressions. Whenever I see the problem, which I can solve with Regex, I felt a burning desire to do it and going to write new test for new regex. Previously I had installed SharpDevelop Studio just for good regular expression tool in it (Why VS doesn’t have one?). But now I’m a little wiser, and for each Regex I write a separate test. I find it difficult to remember the syntax of regular expressions (I don’t write them very often); I always forget which character is responsible for the beginning of the line, etc. So I use external small and easy articles like this “Regular expressions - An introduction”. Now I want to show you little samples of regular expressions and want to show you how to test these samples. Read more... (redirect to http://outcoldman.ru)

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• Do I have to write a lot of boilerplate code if I keep working using Java?

  - by edem

  I'm working for a company writing ERP applications. My problem is that I have to write tons of boilerplate code. I came up with ideas to automatize/prevent the drudgery but only some of them were accepted. I have been told by the lead developer that my ideas tend to be go far afield and I should write code everyone can understand. I had a discussion about this lately and it seems to me that this kind of code ramp is within java's philosophy. I have to write lots of code to achiveve simple things not because it is necessary but because this is the way most of the people at the company think. Is this universally applicable to most of the companies out there using java or this is just my company's view? Do I have to get used to the drudgery if I keep working for java-based firms?

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• Why not write all tests at once when doing TDD?

  - by RichK

  The Red - Green - Refactor cycle for TDD is well established and accepted. We write one failing unit test and make it pass as simply as possible. What are the benefits to this approach over writing many failing unit tests for a class and make them all pass in one go. The test suite still protects you against writing incorrect code or making mistakes in the refactoring stage, so what's the harm? Sometimes it's easier to write all the tests first as a form of 'brain dump' to quickly write down all the expected behavior in one go.

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• Running MSBuild fails to read SDKToolsPath

  - by Scott Mayfield

  Howdy, I'm having a bit of an issue runnning a NAnt script that used to properly build my .Net 2.0 based website, when compiling with VS2008 and it's associated tools. I've recently upgraded all the project/solution files to VS2010, and now my build fails with the following error: [exec] C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Common.targets(2249,9): error MSB3086: Task could not find "sgen.exe" using the S dkToolsPath "" or the registry key "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v7.0A". Make sure the SdkToolsPath is set and the tool exists in the correct processor specific location under the SdkToolsPath and that the Microsoft Windows SDK is installed Now, I DO have prior versions (.Net 3.5) of the Windows SDK installed on the build server, and the full .Net 4.0 framework is installed, but I've not run across a .Net 4.0 specific version of the Windows SDK. After a bit of experimentation and research, I finally just setup a new environmental variable "SDKToolsPath" and pointed it to the copy of sgen.exe in my windows 6.0 sdk folder. This generated the same error, but it got me to notice that even though the SDKToolsPath environmental variable IS set (confirmed that I can "echo" it at the command line and it has the expected value), the error message seems to indicated that it's not being read (note the empty quotes). Most of the information I've found is .Net 3.5 (or earlier) specific. Not much 4.0 related out there yet. Searching for error code MSB3086 generated nothing useful either. Any idea what this might be? Scott

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• Wix - Upgrade always runs older installer msi and fails in trying to read old msi

  - by rkhj

  I'm having a problem though with the Windows caching of the installer. I'm trying to do an upgrade and each time the Windows installer is launching the installer of the older version. And when I do the upgrade it is complaining about problems with reading the older version's msi file (because its not in the same directory anymore). I did change the UpgradeCode and the ProductCode but kept the PackageCode the same. I also have different ProductVersion codes (2.2.3 vs 2.3.0). Here's a sample of my code: <Upgrade Id="$(var.UpgradeCode)"> <UpgradeVersion Property="OLDAPPFOUND" IncludeMinimum="yes" Minimum="$(var.RTMProductVersion)" IncludeMaximum="no" Maximum="$(var.ProductVersion)"/> <UpgradeVersion Property="NEWAPPFOUND" IncludeMinimum="no" Minimum="$(var.ProductVersion)" OnlyDetect="yes"/> </Upgrade> This is the Install Sequence: <InstallExecuteSequence> <Custom Action='SetUpgradeParams' After='InstallFiles'>Installed AND NEWAPPFOUND</Custom> <Custom Action='Upgrade' After='SetUpgradeParams'>Installed AND NEWAPPFOUND</Custom> </InstallExecuteSequence> The error I am getting is: A network error occurred while attempting to read from the file: Thanks,

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• Manditory read-only fields in django

  - by jamida

  I'm writing a test "grade book" application. The models.py file is shown below. class Student(models.Model): name = models.CharField(max_length=50) parent = models.CharField(max_length=50) def __unicode__(self): return self.name class Grade(models.Model): studentId = models.ForeignKey(Student) finalGrade = models.CharField(max_length=3) I'd like to be able to change the final grade for several students in a modelformset but for now I'm just trying one student at a time. I'm also trying to create a form for it that shows the student name as a field that can not be changed, the only thing that can be changed here is the finalGrade. So I used this trick to make the studentId read-only. class GradeROForm(ModelForm): studentId = forms.ModelChoiceField(queryset=Student.objects.all()) def __init__(self, *args, **kwargs): super(GradeROForm,self).__init__(*args, **kwargs) instance = getattr(self, 'instance', None) if instance and instance.id: self.fields['studentId'].widget.attrs['disabled']='disabled' def clean_studentId(self): instance = getattr(self,'instance',None) if instance: return instance.studentId else: return self.cleaned_data.get('studentId',None) class Meta: model=Grade And here is my view: def modifyGrade(request,student): student = Student.objects.get(name=student) mygrade = Grade.objects.get(studentId=student) if request.method == "POST": myform = GradeROForm(data=request.POST, instance=mygrade) if myform.is_valid(): grade = myform.save() info = "successfully updated %s" % grade.studentId else: myform=GradeROForm(instance=mygrade) return render_to_response('grades/modifyGrade.html',locals()) This displays the form like I expect, but when I hit "submit" I get a form validation error for the student field telling me this field is required. I'm guessing that, since the field is "disabled", the value is not being reported in the POST and for reasons unknown to me the instance isn't being used in its place. I'm a new Django/Python programmer, but quite experienced in other languages. I can't believe I've stumbled upon such a difficult to solve problem in my first significant django app. I figure I must be missing something. Any ideas?

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• How can I write reusable Javascript?

  - by RenderIn

  I've started to wrap my functions inside of Objects, e.g.: var Search = { carSearch: function(color) { }, peopleSearch: function(name) { }, ... } This helps a lot with readability, but I continue to have issues with reusabilty. To be more specific, the difficulty is in two areas: Receiving parameters. A lot of times I will have a search screen with multiple input fields and a button that calls the javascript search function. I have to either put a bunch of code in the onclick of the button to retrieve and then martial the values from the input fields into the function call, or I have to hardcode the HTML input field names/IDs so that I can subsequently retrieve them with Javascript. The solution I've settled on for this is to pass the field names/IDs into the function, which it then uses to retrieve the values from the input fields. This is simple but really seems improper. Returning values. The effect of most Javascript calls tends to be one in which some visual on the screen changes directly, or as a result of another action performed in the call. Reusability is toast when I put these screen-altering effects at the end of a function. For example, after a search is completed I need to display the results on the screen. How do others handle these issues? Putting my thinking cap on leads me to believe that I need to have an page-specific layer of Javascript between each use in my application and the generic methods I create which are to be used application-wide. Using the previous example, I would have a search button whose onclick calls a myPageSpecificSearchFunction, in which the search field IDs/names are hardcoded, which marshals the parameters and calls the generic search function. The generic function would return data/objects/variables only, and would not directly read from or make any changes to the DOM. The page-specific search function would then receive this data back and alter the DOM appropriately. Am I on the right path or is there a better pattern to handle the reuse of Javascript objects/methods?

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• CURL & web.py: transfer closed with outstanding read data remaining

  - by Richard J

  Hi Folks, I have written a web.py POST handler, thus: import web urls = ('/my', 'Test') class Test: def POST(self): return "Here is your content" app = web.application(urls, globals()) if __name__ == "__main__": app.run() When I interact with it using Curl from the command line I get different responses depending on whether I post it any data or not: curl -i -X POST http://localhost:8080/my HTTP/1.1 200 OK Transfer-Encoding: chunked Date: Thu, 06 Jan 2011 16:42:41 GMT Server: CherryPy/3.1.2 WSGI Server Here is your content (Posting of no data to the server gives me back the "Here is your content" string) curl -i -X POST --data-binary "@example.zip" http://localhost:8080/my HTTP/1.1 100 Content-Length: 0 Content-Type: text/plain HTTP/1.1 200 OK Transfer-Encoding: chunked Date: Thu, 06 Jan 2011 16:43:47 GMT Server: CherryPy/3.1.2 WSGI Server curl: (18) transfer closed with outstanding read data remaining (Posting example.zip to the server results in this error) I've scoured the web.py documentation (what there is of it), and can't find any hints as to what might be going on here. Possibly something to do with 100 continue? I tried writing a python client which might help clarify: h1 = httplib.HTTPConnection('localhost:8080') h1.request("POST", "http://localhost:8080/my", body, headers) print h1.getresponse() body = the contents of the example.zip, and headers = empty dictionary. This request eventually timed out without printing anything, which I think exonerates curl from being the issue, so I believe something is going on in web.py which isn't quite right (or at least not sufficiently clear) Any web.py experts got some tips? Cheers, Richard

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• Download file in coldfusion and read its content

  - by Deepak

  cfhttp with a get to download the files. Does anyone have an example of cfhttp working? Are there special settings that need to be set up on the server side to get this tag to work. When I try the following code: <CFHTTP METHOD = "get" URL="http://data.bls.gov/PDQ/servlet/SurveyOutputServlet?series_id=LNU04032231&years_option=specific_years&to_year=2010&from_year=2009&delimiter=comma&output_view&output_format=excelTable" path="/Users/Deepak" file="testfile.xls"> Nothing comes back to my computer? How do you get it to pop up the "where do you want to save the file box" dialogue box? I am submitting a form in coldfusion by hitting this link http://data.bls.gov/PDQ/servlet/SurveyOutputServlet?series_id=LNU04032231&years_option=specific_years&to_year=2010&from_year=2009&delimiter=comma&output_view&output_format=excelTable I am getting a excel file as a result. How can I save this file on my local box. Or, is it possible to directly read the content of file without saving it in my local box through coldfusion using cfftp or cfhttp? cfhttp.mimeType is application/vnd.ms-excel in this case. Thanks!!

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• Cannot read values from [NSUserDefaults standardUserDefaults] after synchronize

  - by Nonlinearsound

  In the Application Delegate didFinishLaunching method, I am using the following code to build up a new NSDictionary to be used as the new settings bundle for the user: NSNumber *testValue = (NSNumber*)[[NSUserDefaults standardUserDefaults] objectForKey:@"settingsversion"]; if (testValue == nil) { NSNumber *numNewDB = [NSNumber numberWithBool:NO]; NSNumber *numFirstUse = [NSNumber numberWithBool:YES]; NSDate *dateLastStatic = [NSDate date]; NSDate *dateLastMobile = [NSDate date]; NSNumber *numSettingsversion = [NSNumber numberWithFloat:1.0]; NSDictionary *appDefaults = [NSDictionary dictionaryWithObjectsAndKeys: numNewDB, @"newdb", numFirstUse, @"firstuse", numSettingsversion, @"settingsversion", dateLastStatic, @"laststaticupdate", dateLastMobile, @"lastmobileupdate", nil]; [[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults]; [[NSUserDefaults standardUserDefaults] synchronize]; } Later in another ViewController I am trying to read back a value from that same Dictionary, saved as the NSUserDefaults - well at least I thought it would, but I don't get any valid object pointer for the desired member lastUpdate back there: in .h file: NSDate *lastUpdate; in the .m file in a member function: lastUpdate = (NSDate *)[[NSUserDefaults standardUserDefaults] objectForKey:@"laststaticupdate"]; Even, if I print out the content of [NSUserDefaults standardUserDefaults] I only get this: 2010-04-29 15:13:22.322 myApp[4136:207] Content of UserDefaults: <NSUserDefaults: 0x11d340> This leads me to the conclusion that there is no standardUserDefaults dictionary somewhere in memory or it cannot be determined as such a structure. Edit: Every time, I restart the app ión the device, the check for testValue is Nil and I am building up the dictionary again but after one run it should be persistent on the Phone, right? Am I doing something wrong somewhere in between? I have the feeling that I yet didn't really understand how to load and save settings persistent for a certain application on the iPhone. Is there anything I have to do additionally to this? Integrating a settings.bundle in XCode or saving the dictionary manually to the Documents folder? Can someone help me out here? Thanks a lot!

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