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• Encoding non-English characters

  - by Martin

  Hey there! I'm having a bit of trouble here and I was hoping someone throws me a hint :) I'm getting some GET VARS with JS but I have trouble with non-latin charsets: cyrillic for example. The cyrillic var appears correct in the url but when I retrieve it with JS I get some dummy string. I was wondering of a function similar to "unescape" for such a case. Alternatively, if someone knows a way I could convert a cyrillic string to the same dummy string I get from the URL, it will still do me the trick, since all I need is compare. :) Thanks! Martin

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• .NET Data Providers - How do I determine what they can do?

  - by rbellamy

  I have code which could be executed using a Provider that doesn't support transactions, or doesn't support nested transactions. How would I programmatically determine such support? E.g. The code below throws a System.InvalidOperationException on the final commit when using the MySQL .NET Connector, but works fine for MSSQL. I'd like to be able to alter the code to accommodate various providers, without having to hardcode tests based on the type of provider (E.g. I don't want to have to do if(typeof(connection) == "some provider name")) using (IDbConnection connection = Use.Connection(ConnectionStringName)) using (IDbTransaction transaction = connection.BeginTransaction()) { using (currentCommand = connection.CreateCommand()) { using (IDbCommand cmd = connection.CreateCommand()) { currentCommand = cmd; currentCommand.Transaction = transaction; currentCommand.ExecuteNonQuery(); } if (PipelineExecuter.HasErrors) { transaction.Rollback(); } else { transaction.Commit(); } } transaction.Commit(); }

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• Isn't fb_sig_friends supposed to be there?

  - by Seeker

  According to the docs, Facebook is supposed to send both fb_sig_canvas_user and fb_sig_friends for a canvas application. Sadly, I only get fb_sig_canvas_user and NOT fb_sig_friends. Is there anything I have to do to get this parameter? Or is there any other way to retrieve the friends of the visiting (not-yet-authorized) user, without the need of a session key (API throws exception with message "Requires user session")? And yes, _fb_fromhash is present in the request (coming to the canvas app. from a user's application tab).

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• How does Read-Only affect a Directory?

  - by ispiro

  I've found that I can write (say, copy a file into) a Read-Only directory. That is, a Directory with ...Attributes = FileAttributes.ReadOnly.I can even change its name. The only thing I've found that can't be done is to delete it. Is that really the only thing that ReadOnly prevents? EDIT: Here's the code: (The Directory is empty.) (new DirectoryInfo(path)).Attributes = FileAttributes.ReadOnly; Directory.Delete(path); It throws an Access to the path 'c:\... is denied. exception. But after changing ReadOnly to Normal it works fine. So what does a ReadOnly prevent, and what doesn't it prevent?

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• Subsonic 3.0 - .Net - Error : Can not ceate an instance of an interface

  - by George

  Hi, I am new to Subsonic, I have configured Subsonic3.0 T4 Template and created classes for my project. I have taken GridView and Object Datasource. Object datasource will connect to the one of the classes which is created from subsonic. I have set object datasource for g\fetch, Insert, Update and delete methods. Then i set the datasource of grid witht he object datasource. Grid view successfully showing me all the records. But at the time of Update, Insert or delete it throws an exception that "Can not ceate an instance of an interface". And also i am not able to dwbug in the code of the subsonic. May be because of partial classes. Can anyone please let me know what is happening at the backgrund? Or may be one can give me sample example which contains subsonic 3.0 and grid add, edit and delete so it will be really helpful for me.... Please... :) Thanks, George

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• Iterables.find and Iterators.find - instead of throwing exception, get null

  - by mjlee

  I'm using google-collections and trying to find the first element that satisfies Predicate if not, return me 'null'. Unfortunately, Iterables.find and Iterators.find throws NoSuchElementException when no element is found. Now, I am forced to do Object found = null; if ( Iterators.any( newIterator(...) , my_predicate ) { found = Iterators.find( newIterator(...), my_predicate ) } I can surround by 'try/catch' and do the same thing but for my use-cases, I am going to encounter many cases where no-element is found. Is there a simpler way of doing this?

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• Handling PHP exceptions with JQuery

  - by Itamar Bar-Lev

  Hello, I'm using JQuery to call a PHP function that returns a JSON string upon success or throws some exceptions. Currently I'm calling jQuery.parseJSON() on the response and if it fails I assume the response contains an exception string. $.ajax({ type: "POST", url: "something.php", success: function(response){ try { var json = jQuery.parseJSON(response); } catch (e) { alert(response); return -1; } // ... do stuff with json } Can anyone suggest a more elegant way to catch the exception? Many thanks, Itamar

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• Java and gstreamer-java initialisation error

  - by Mark

  I am building a small app which will play streaming audio from the internet in java (mainly internet radio stations). I have decided to use the gstreamer-java library for the sound, which uses JNA. I would like to include a check in the code, to see whether the gstreamer library has been initialised. When I have left the "Gst.init()" code out (to mimic when the library has not been initialised correctly), the application throws out the following messages: (process:21888): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.22.3/gobject/gtype.c:2458: initialization assertion failed, use IA__g_type_init() prior to this function (process:21888): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed The app calls the gstreamer-java library. The error messages appear but the thread continues to run, hogging the CPU. Is there any way to catch the error or to add a check to prevent it from happening? An alternative would be to put the "Gst.init()" in the main class, but I am not sure if this would always guarantee the gstreamer library is initialised.

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• Read/Write protected memory?

  - by PenguinBoy

  I'm trying to learn C++ currently, but I'm having issues with the code below. class Vector2 { public: double X; double Y; Vector2(double X, double Y) { this->X = X; this->Y = Y; }; SDL_Rect * getSdlOffset() { SDL_Rect * offset = new SDL_Rect(); offset->x = this->X; offset->y = this->Y; return offset; }; }; Visual studio throws throw the following error when calling getSdlOffset() An unhandled exception of type 'System.AccessViolationException' occurred in crossEchoTest.exe Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. I've got a C#/java background, and I'm lost... Any help would be much appreciated.

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• ora-00939 error in reporting services, SSRS

  - by san

  Hi, I have an SSRS report , Oracle is my backend and am using this following query for dataset of my second parameter. select distinct X from v_stf_sec_user_staffing_center usc where usc.center_group_id in ( select distinct center_group_id from V_T_STAFFING_CENTER_GROUP scg where INSTR(','||REPLACE(:PI_REGION_LIST,' ')||',', ','||scg.group_abbreviation||',') 0) and usc.nt_user_name=:PI_NT_USER_NAME Here PI_REGION_LIST is a multivalued parameter of string type. and PI_NT_USER_NAME is a default string valued parameter this query works fine when i try to execute in manulally in the Data tab , also in the Oracle tool. But when i run the report in SSRS and select more than 3 values for the parameter PI_REGION_LIST the report throws an error on this dataset, ora-00939 error,too many arguments for function. I am not able to figure out the error here. Please help me with an idea. Thanks in advance, Suni.

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• How to clear the memory allocated for Customized Exception

  - by ilan

  Hi All I have a customized exception class. say class CustomExcep{}; My Application is a middleware made of C++. It is a webservice which is used for the communication between Java based web Front-end and the DCE Backend. whenever the DCE Backend is not running or down due to some core dumps, the application throws the CustomExcep. It's like this. CustomExcep * exc = new CustomExcep(); throw exc; I am unable to use the stack memory for this as it leads to some run-time exceptions. I need a solution to clear the memory used by this CustomException. Can we use Templates for this purpose? Any help would be appreciated. Thanks in Advance.

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• Converting String^ and Collection of String^ to const char*

  - by Jim Jones

  Using VS2008 Managed C++ to wrap a dll. The native method takes a series of single const char* values and a collection of char* values. Going to make an example function: Function1(char * value1, TF_StringList& catList); TF_StringList is a dll class with 3 insert methods, the one I want to use is: TF_StringList::insert(const char* str); So I set up a wrapper method of: WrapperClass::callFunction(String^ mvalue1, ArrayList mcatList); mvalue1 is converted to const char* using: const char* value1 = (char*)(Marshal::StringToHGlobalAnsi(mvalue1)).ToPointer(); However, when a get to the collection of strings, I iterate over it getting each string using the index: String^ mstr = mcatList[i]; Have tried every way of converting String^ to const char* and in every case the TF_StringList::insert(const char* str) method throws a C2663 error which has to do with the const-ness of the value. What is the problem?

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• In Applescript, why do local variables in handlers capture "with" labeled parameters?

  - by outis

  In Applescript, if you declare a handler using "with" labeled parameters, local variables get the values of the arguments and the parameters themselves are undefined. For example: on bam of thing with frst and scnd local eat_frst return {thing: thing, frst:frst, scnd:scnd} -- this line throws an error end bam bam of "bug-AWWK!" with frst without scnd results in an error message that "scnd" isn't defined in the second line of bam. thing and frst are both defined, getting the arguments passed in the call to bam. Why is this happening? Why is scnd undefined? Note: I know that declaring variables as "local" within a handler is unnecessary. It's done in the examples for illustrative purposes.

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• Which .NET class does represent the main CONTROLLER class for WebForms ?

  - by Renato Gama

  Hey guys, lately I was studying a bit of Java, when I was taught about a way to implement a controller class, whose resposibility is to redirect the request to an Action, which perfoms a specified work. That was the way I learnt; @Override protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { String clazz = req.getRequestURI().replaceAll(req.getContextPath() + "/", "").replaceAll(".java", ""); ((Action)Class.forName("com.myProject.actions." + clazz).newInstance()).execute(req, res); } catch (Exception e) { e.printStackTrace(); } } I know that WebForms also works with HANDLERS, which are kind of actions. For example, each .aspx page inherits from a Page object which is a handler for that specified page. What I couldn't figure out is, which class does get request first and translate it to the specified action (page handler)? Is it a WebForms feature(implementation) or its a IIS resposibility? So, which class represent the main controller for WebForms? Thank you very much.

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• Group by/count in LINQ against SQL Compact 3.5 SP2

  - by bash74

  Hello, I am using LINQ-To-Entities in C# and run queries against a SQL Compact Server 3.5 SP2. What I try to achieve is a simple group by with an additional where clause which includes a Count(). var baseIdent="expression"; var found=from o in ObservedElements where o.ObservedRoots.BaseIdent==baseIdent group o by o.ID into grouped where grouped.Count()==1 select new {key=grouped.Key, val=grouped}; foreach(var res in found){ //do something here } This query throws the famous exception "A parameter is not allowed in this location. Ensure that the '@' sign and all other parameters are in a valid location in the SQL statement." When I either omit the where clause OR directly enter the expression "expression" in the query (where o.ObservedRoots.BaseIdent=="expression") everything just works fine. Does anybody know how to solve this? Workaround would also be fine? Thanks in advance, Sebastian

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• Eclipse RCP Application Fails to launch second time

  - by ibuck

  I have an Eclipse RCP application that will launch properly after a clean install (right after build). The issue is that if I try to launch the application a second time the application throws an exception. I have narrowed the issue down to this file being created after the first run: ~install_dir/configuration/org.eclipse.osgi/.state Has anyone run into a similar issue where the .state file prevents the application from being launched anytime after that first run? I'm hesitant to look at the exception as this does not happen the first time, so I suspect org.eclipse.osgi is more to blame. The details of the exception are: "Error creating bean with name 'luceneRawQueryComposer' defined in class path resource [spring/dataaccess/daoCMClient.xml]: Cannot resolve reference to bean 'indexUtility' while setting bean property 'indexUtility'; NoSuchBeanDefinitionException

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• web2py error while using distinct in the queries

  - by Steve

  Hi, I am using web2py with GAE. While using some of the queries which has a distinct clause, GAE throws out an error.I have pasted the Traceback. Can someone please help me out with this. In FILE: /base/data/home/apps/panneersoda/1.341206242889687944/applications/init/controllers/default.py Traceback (most recent call last): File "/base/data/home/apps/panneersoda/1.341206242889687944/gluon/restricted.py", line 173, in restricted exec ccode in environment File "/base/data/home/apps/panneersoda/1.341206242889687944/applications/init/controllers/default.py:profileview", line 263, in <module> File "/base/data/home/apps/panneersoda/1.341206242889687944/gluon/globals.py", line 96, in <lambda> self._caller = lambda f: f() File "/base/data/home/apps/panneersoda/1.341206242889687944/applications/init/controllers/default.py:profileview", line 97, in profileview File "/base/data/home/apps/panneersoda/1.341206242889687944/gluon/contrib/gql.py", line 675, in select (items, tablename, fields) = self._select(*fields, **attributes) File "/base/data/home/apps/panneersoda/1.341206242889687944/gluon/contrib/gql.py", line 624, in _select raise SyntaxError, 'invalid select attribute: %s' % key SyntaxError: invalid select attribute: distinct Thanks

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• Why connection in Python's DB-API does not have "begin" operation?

  - by newtover

  Working with cursors in mysql-python I used to call "BEGIN;", "COMMIT;", and "ROLLBACK;" explicitly as follows: try: cursor.execute("BEGIN;") # some statements cursor.execute("COMMIT;") except: cursor.execute("ROLLBACK;") then, I found out that the underlying connection object has the corresponding methods: try: cursor.connection.begin() # some statements cursor.connection.commit() except: cursor.connection.rollback() Inspecting the DB-API PEP I found out that it does not mention the begin() method for the connection object, even for the extensions. Mysql-python, by the way, throws the Deprecation Warning, when you use the method. sqlite3.connection, for example, does not have the methd at all. And the question is why there is no such method in the PEP? Is the statement somehow optional, is it enough to invoke commit() instead?

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• ajax parameter to send correctly a variable to a specified url

  - by kawtousse

  I am trying to send data to a servlet from a js file but the servlet never received the parameter. so this is what I have: function showProject(prj) { xmlhttp=GetXmlHttpObject(); if (xmlhttp==null) { alert ("Browser does not support HTTP Request"); return; } var url="ServletxmlGenerator"; idprj = prj.options[prj.selectedIndex].value; //alert(idprj); url=url+"?idprj="+idprj; xmlhttp.onreadystatechange=stateChanged; xmlhttp.open("GET",url,true); xmlhttp.send(null); } and to capture th request it is with: public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String projectcode=request.getParameter("idprj"); System.out.println("++++projectCode:=" +projectcode); the output is like: ++++projectCode:=null Can any one explain it to me it seems to be correct but i didnot find the error.Thinks

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• Zero division does not throw exception in nunit

  - by Boris

  Running the following C# code through NUnit yields Test.ControllerTest.TestSanity: Expected: <System.DivideByZeroException> But was: null So either no DivideByZeroException is thrown, or NUnit does not catch it. Similar to this question, but the answers he got, do not seem to work for me. This is using NUnit 2.5.5.10112, and .NET 4.0.30319. [Test] public void TestSanity() { Assert.Throws<DivideByZeroException>(new TestDelegate(() => DivideByZero())); } private void DivideByZero() { // Parse "0" to make sure to get an error at run time, not compile time. var a = (1 / Double.Parse("0")); } Any ideas?

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• Perl Hash Slice, Replication x Operator, and sub params

  - by user210757

  Ok, I understand perl hash slices, and the "x" operator in Perl, but can someone explain the following code example from here (slightly simplified)? sub test{ my %hash; @hash{@_} = (undef) x @_; } Example Call to sub: test('one', 'two', 'three'); This line is what throws me: @hash{@_} = (undef) x @_; It is creating a hash where the keys are the parameters to the sub and initializing to undef, so: %hash: 'one' = undef, 'two' = undef, 'three' = undef The rvalue of the x operator should be a number; how is it that @_ is interpreted as the length of the sub's parameter array? I would expect you'd at least have to do this: @hash{@_} = (undef) x length(@_);

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• Using a Filter to serve a specific page?

  - by user246114

  Hi, I am using a class which implements Filter for my jsp stuff. It looks like this: public class MyFilter implements Filter { public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.getRequestDispatcher("mypage.jsp").forward(request, response); } } So the target, "mypage.jsp", is just sitting in my top-level directory. The filter works fine if I'm entering urls like: http://www.mysite.com/foo http://www.mysite.com/boo but if I enter a trailing slash, I'll get a 404: http://www.mysite.com/foo/ http://www.mysite.com/boo/ HTTP ERROR: 404 /foo/mypage.jsp RequestURI=/foo/mypage.jsp it seems if I enter the trailing slash, then the filter thinks I want it to look for mypage.jsp in subfolder foo or boo, but I really always want it to just find it at: http://www.mysite.com/mypage.jsp how can I do that? Thank you

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• Get a list of documents from Mongo DB

  - by Andrei Neagu

  Hello, I want to do something like this: List<int> fff = new List<int>(); fff.Add(1); fff.Add(2); fff.Add(5); Mongo m = new Mongo(); m.Connect(); var dataBase = m.GetDatabase("database"); var collection = dataBase.GetCollection("coll"); IMongoQuery queryable = collection.AsQueryable(); MongoQueryProvider prov = new MongoQueryProvider(collection); var query = new MongoQuery(prov); var ffppp = from p221 in query where fff.Contains((int)p221["oid"]) select p221; This throws this error : The method 'Contains' could not be converted into a constant. I saw that mongo has an operator $in. Does any one know how can I use it from c#? (http://www.mongodb.org/display/DOCS/Advanced+Queries) Thanks

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• Android file-creation fails.

  - by Alxandr

  I use the following code to create a folder "mymir" and a file ".nomedia" (in the mymir-folder) on the sdcard of an android unit. However, somehow it fails with the exception that the folder the ".nomedia"-file is to be placed in dosn't exist. Here's the code: private String EnsureRootDir() throws IOException { File sdcard = Environment.getExternalStorageDirectory(); File mymirFolder = new File(sdcard.getAbsolutePath() + "/mymir/"); if(!mymirFolder.exists()) { File noMedia = new File(mymirFolder.getAbsolutePath() + "/.nomedia"); noMedia.mkdirs(); noMedia.createNewFile(); } return mymirFolder.getAbsolutePath(); }

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• java checked exception in a catch clause compilation error

  - by srandpersonia

  Hi, I was expecting an compilation error in the following program because of the throw statement in the catch block as IOException is a checked exception and it is not caught by another try block within the catch block. But I am getting "Hurray!" printed. Any explanation would be much appreciated. According to JLS 11.2.3, http://java.sun.com/docs/books/jls/third_edition/html/exceptions.html It is a compile-time error if a method or constructor body can throw some exception type E when both of the following hold: * E is a checked exception type * E is not a subtype of some type declared in the throws clause of the method or constructor. import java.io.*; public class Test{ public static void main(String args[]) { System.out.println(method()); } public static int method() { try{ throw new Exception(); } catch(Exception e){ throw new IOException(); //No compile time error } finally{ System.out.println("Hurray!"); } } } Thanks in advance.

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