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• What causes exception in string.concat

  - by Budda

  Here are few classes: public class MyItem : ParamOut { public string Code { get { return _quoteCode; } } public InnerItem[] Skus { get { return _skus; } } public PriceSummary Price { get { return _price; } } public override string ToString() { return string.Concat("Code=", Code, "; SKUs=[", Skus != null ? "{" + string.Join("},{", Array.ConvertAll(Skus, item => item.ToString())) + "}" : "", "]" , "; Price={", Price.ToString(), "}", base.ToString() ); } ... } public abstract class ParamOut { public override string ToString() { return null; } public string ErrorMessage { get; set; } } Here is calling functionality: { MyItem item = new MyItem{ ErrorMessage = "Bla-bla-bla" }; string text = item.ToString(); } I am getting NullReference exception inside of 'ToString()' method (each property of item variable is null). Question: Q1. what overload of string.Concat will be called in this case? I have 9 parameters, so I guess one of the following: public static string Concat(params Object[] args) or public static string Concat(params string[] values) But which of them? Q2. Why exception is generated? Shouldn't 'null' be converted into something like 'null' or "" (empty string)? Thanks a lot!

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• Is there a better way of launching same app from GUI or Command line

  - by markhunte

  Hi All, I worked out a way of running my Cocoa (GUI) app. From either the normal double clicking it, Or from the CLI. I realised that when an app launches from a double click (GUI), it returns an argument count (argc) of 0. But when launched from the CLI it will have an argc of 1. So long as I do not put any arguments myself. Which means I can use if.. else.. to determine how the app was launched. This works fine for my app as I do not need to put arguments. But I wondered if there was a better way of doing it. Here is an example of the code in the main.m int main (int argc, const char * argv[]) { //This determins if the app is launched from the command line or app itself is opened. if (argc == 1) { //app was run from CLI // Create a object MyClass *mMyClass; mMyClass = [[MyClass alloc] init]; // Read the Buffer [mMyClass readBuffer]; // Write out file on disk [mMyClass createFile]; [mMyClass doMoreStuff]; [mMyClass release]; mMyClass = nil; return 0; } else { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; //app was doubled click, (Opened) return NSApplicationMain(argc, (const char **) argv); [pool drain]; // */ // return NSApplicationMain(argc, (const char **) argv); }} Many Thanks. M

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• Trouble getting NSString from NSDictionary key into UILabel

  - by Brian

  I'm attempting to put the value associated with the key called "duration" into a UILabel but I'm getting a blank or "(null)" result showing up in the UILabel. My NSDictionary object with its keys seems to be logging as being full of the data and keys I think I want, as such: the content of thisRecordingsStats is { "12:48:25 AM, April 25" = { FILEPATH = "/Users/brian/Library/Application Support/iPhone Simulator/3.1.3/Applications/97256A91-FC47-4353-AD01-15CD494060DD/Documents/12:48:25 AM, April 25.aif"; duration = "00:04"; applesCountString = 0; ...and so on. Here's the code where I'm trying to put the NSString into the UILabel: cell.durationLabel.text = [NSString stringWithFormat:@"%@",[thisRecordingsStats objectForKey:@"duration"]]; I've also tried these other permutations: cell.durationLabel.text = [thisRecordingsStats objectForKey:@"duration"]; and I've also tried this tag-based approach: label = (UILabel *)[cell viewWithTag:8]; label.text = [[thisRecordingsStats objectForKey:@"duration"] objectAtIndex:1]; and: UILabel *label; label = (UILabel *)[cell viewWithTag:8]; label.text = [NSString stringWithFormat:@"%@",[[thisRecordingsStats objectForKey:@"duration"] objectAtIndex:1]]; I've also tried creating a string from the key's paired value and see a "(null)" value or blankness using that too. What am I missing? I assume it's something with the formatting of the string. Thanks for looking!!

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• Why is the ASP Repeater.Items collection empty, when controls are on the screen?

  - by Ryan

  I have an ASP page with the following repeater: <asp:Repeater runat="server" ID="RegionRepeater" DataSourceID="SqlDataSourceRegions" EnableViewState="true"> <ItemTemplate> <tr> <td valign="top"> <b><%#Eval("description")%></b> <asp:HiddenField runat="server" ID="RegionID" Value='<%#Eval("region_id")%>'/> </td> <td> <asp:FileUpload ID="FileUpload" runat="server" Width="368px" /> </td> </tr> </ItemTemplate> </asp:Repeater> (The repeater is inside a Wizard, inside a content pane). The code behind is connected to the protected void Wizard1_NextButtonClick(object sender, WizardNavigationEventArgs e) event. There are two items on the screen (two rows inside the table). However, when the code tries to read those items, the Items collection is empty! foreach(RepeaterItem region in RegionRepeater.Items) { // Never runs - the RegionRepeater.Items.Count = 0 FileUpload fileUpload = (FileUpload) region.FindControl("FileUpload"); String regionID = ((HiddenField)region.FindControl("RegionID")).Value; ... Why is the collection empty, when there are controls drawn on the screen? Thanks a lot for any help; this is starting to drive me nuts. (BTW: I tried adding/removing the EnableViewState="true" tag)

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• Core Data Migration - "Can't add source store" error

  - by Tofrizer

  Hi, In my iPhone app I'm using Core Data and I've made changes to my data model that cannot be automatically migrated over (i.e. added new relationships). I added the data model version (Design - Data Model - Add Model Version) and applied my new data model changes to the new version 2. I then created a mapping object model and set the Source and Destination models to their correct data models (old and new respectively). When I run the app and call the persistentStoreCoordinator, my app barfs with the following: 2010-02-27 02:40:30.922 XXXX[73578:20b] Unresolved error Error Domain=NSCocoaErrorDomain Code=134110 UserInfo=0xfc2240 "Operation could not be completed. (Cocoa error 134110.)", { NSUnderlyingError = Error Domain=NSCocoaErrorDomain Code=134130 UserInfo=0xfbb3a0 "Operation could not be completed. (Cocoa error 134130.)"; reason = "Can't add source store"; } FWIW (not much i think) I've also made the usual code changes in persistentStoreCoordinator to use the NSMigratePersistentStoresAutomaticallyOption and NSInferMappingModelAutomaticallyOption (for future data model changes that can be automatically migrated). More relevantly, my managedObjectModel is created by calling initWithContentsOfURL where the file/resource type is "momd". I've tried updating both the source and destination model in the mapping model (Design - Mapping Model - Update XXX Model) as well as deleted the mapping model and recreated it. I've cleaned and re-built but all to no avail. I still get the above error message. Any pointers/thoughts on how I can further debug or resolve this problem please? I haven't posted any code snippets because this feels much more like a build environment issue (and my code is very standard - just the usual core data code to handle migrations using a mapping model but I'm happy to show the code if it helps). Appreciate any help. Thanks

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• XML to Type - Quick way?

  - by MRFerocius

  Team; How are you doing? Im breaking my head trying to do this that seems simple but I can't figure it out... Suppose I have this XML as a string: <calles> <calle> <nombre>CALLAO AV.</nombre> <altura>1500</altura> <longitud>-58.3918617027</longitud> <latitud>-34.5916734896</latitud> <barrio>Recoleta</barrio> </calle> </calles> And and have this Type I created to map that XML: public class Ubicacion { public string Latitud { get; set; } public string Longitud { get; set; } public string Nombre { get; set; } public string Altura { get; set; } public string Barrio { get; set; } public Ubicacion() { } } I need to take that XML file and create an object with those values... Does somebody know a quick way to do it? with C#? I have been trying this but is not working at all... XElement dir = XElement.Parse(text); Ubicacion informacion = from d in dir.Elements("calle"). select new Ubicacion { Longitud = d.Element("longitud").Value, Latitud = d.Element("latitud").Value, Altura = d.Element("altura").Value, Nombre = d.Element("nombre").Value, Barrio = d.Element("barrio").Value, }; return informacion.Cast<Ubicacion>(); } Any ideas? Thanks!!!

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• Formatting and pretty printing dates with jquery

  - by Tauren

  I need to display dates in a couple different ways in an app built with jquery. In some situations, I need the typical "yyyy-mm-dd hh:mma" type of formatting, with all of it's different permutations. In other cases, I need to show dates "pretty printed" similar to how StackOverflow does them: 5 seconds ago 12 minutes ago 3 hours ago yesterday 2 days ago My application already uses JQuery UI DatePicker which includes a formatDate() function, but as far as I can tell, there is no way to use it outside of the datepicker. I want to format dates that aren't associated with a datepicker. Is it possible to do this using DatePicker? The DateJS library can parse dates like "12 minutes ago", but as far as I can tell, it cannot take a Date object and format strings like this. It can format the typical "yyyy-mm-dd" types of formats. This library seems pretty heavy as well. John Resig's Pretty Dates looks like it can provide the pretty printing ("2 hours ago"), but it doesn't do the standard formatting. Is there not a single plugin that can do all of this? Is there a way to leverage the DatePicker code so I don't have to load multiple codebases that do the same things?

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• C# sendkeys problem

  - by user203123

  THe code below I copied from MSDN with a bit of modification: [DllImport("user32.dll", CharSet = CharSet.Unicode)] public static extern IntPtr FindWindow(string lpClassName,string lpWindowName); DllImport("User32")] public static extern bool SetForegroundWindow(IntPtr hWnd); int cnt = 0; private void button1_Click(object sender, EventArgs e) { IntPtr calculatorHandle = FindWindow("Notepad", "Untitled - Notepad"); if (calculatorHandle == IntPtr.Zero) { MessageBox.Show("Calculator is not running."); return; } SetForegroundWindow(calculatorHandle); SendKeys.SendWait(cnt.ToString()); SendKeys.SendWait("{ENTER}"); cnt++; SendKeys.Flush(); System.Threading.Thread.Sleep(1000); } The problem is the number sequence in Notepad is not continuously. The first click always results 0 (as expected). but from the second click, the result is unpredictable (but the sequence is still in order, e.g. 3, 4, 5, 10, 14, 15, ....) If I click the button fast enough, I was able to get the result in continuous order (0,1,2,3,4,....) but sometimes it produces more than 2 same numbers (e.g. 0,1,2,3,3,3,4,5,6,6,6,7,8,9,...) Couldn't understand. Plz enlighten me :) Thanks.

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• ASP.Net RadioButton loses ViewState

  - by Carl

  I'm having trouble with a simple radio set of two radio buttons (I don't want to use a RadioButtonList [RBL] because RBL doesn't allow child controls, and in my case, if you select one option, I want to enable a textbox next to the button; yes you could hack this with jQuery to move the textbox, but that's dirty!). I would check one, submit the form (either explicitly or through AutoPostBack), and the CheckedChanged event would never fire. When the page was reloaded, both buttons would be unchecked, regardless of their initial state on non-postback load or the state before form submission. I took out the checkbox and stripped this down to the simplest example I could come up with. I tossed EnableViewState=true all over the place just in case it was being disabled somewhere I couldn't find. <form id="form1" runat="server" enableviewstate="true"> <div> <asp:RadioButton ID="foo" Text="foo" runat="server" AutoPostBack="true" OnCheckedChanged="rbChanged" Checked="true" GroupName="foobar" EnableViewState="true" /> <asp:RadioButton ID="bar" Text="bar" runat="server" AutoPostBack="true" GroupName="foobar" OnCheckedChanged="rbChanged" Checked="false" EnableViewState="true" /> <asp:Label runat="server" ID="resultLbl" /> </div> </form> protected void rbChanged(object sender, EventArgs e) { if (foo.Checked) resultLbl.Text = "foo is checked"; else if (bar.Checked) resultLbl.Text = "bar is checked"; else resultLbl.Text = "neither is checked"; }

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• Migration for creating and deleting model in South

  - by Almad

  I've created a model and created initial migration for it: db.create_table('tvguide_tvguide', ( ('id', models.AutoField(primary_key=True)), ('date', models.DateField(_('Date'), auto_now=True, db_index=True)), )) db.send_create_signal('tvguide', ['TVGuide']) models = { 'tvguide.tvguide': { 'channels': ('models.ManyToManyField', ["orm['tvguide.Channel']"], {'through': "'ChannelInTVGuide'"}), 'date': ('models.DateField', ["_('Date')"], {'auto_now': 'True', 'db_index': 'True'}), 'id': ('models.AutoField', [], {'primary_key': 'True'}) } } complete_apps = ['tvguide'] Now, I'd like to drop it: db.drop_table('tvguide_tvguide') However, I have also deleted corresponding model. South (at least 0.6.2) is however trying to access it: (venv)[almad@eva-03 project]$ ./manage.py migrate tvguide Running migrations for tvguide: - Migrating forwards to 0002_removemodels. > tvguide: 0001_initial Traceback (most recent call last): File "./manage.py", line 27, in <module> execute_from_command_line() File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line utility.execute() File "/usr/lib/python2.6/site-packages/django/core/management/__init__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/usr/lib/python2.6/site-packages/django/core/management/base.py", line 222, in execute output = self.handle(*args, **options) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/management/commands/migrate.py", line 91, in handle skip = skip, File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/migration.py", line 581, in migrate_app result = run_forwards(mapp, [mname], fake=fake, db_dry_run=db_dry_run, verbosity=verbosity) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/migration.py", line 388, in run_forwards verbosity = verbosity, File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/migration.py", line 287, in run_migrations orm = klass.orm File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/orm.py", line 62, in __get__ self.orm = FakeORM(*self._args) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/orm.py", line 45, in FakeORM _orm_cache[args] = _FakeORM(*args) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/orm.py", line 106, in __init__ self.models[name] = self.make_model(app_name, model_name, data) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/orm.py", line 307, in make_model tuple(map(ask_for_it_by_name, bases)), File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/utils.py", line 23, in ask_for_it_by_name ask_for_it_by_name.cache[name] = _ask_for_it_by_name(name) File "/home/almad/projects/mypage-all/lib/python2.6/site-packages/south/utils.py", line 17, in _ask_for_it_by_name return getattr(module, bits[-1]) AttributeError: 'module' object has no attribute 'TVGuide' Is there a way around?

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• Parallel WCF calls to multiple servers

  - by gregmac

  I have a WCF service (the same one) running on multiple servers, and I'd like to call all instances in parallel from a single client. I'm using ChannelFactory and the interface (contract) to call the service. Each service has a local <endpoint> client defined in the .config file. What I'm trying to do is build some kind of generic framework to avoid code duplication. For example a synchronous call in a single thread looks something like this: Dim remoteName As String = "endpointName1" Dim svcProxy As ChannelFactory(Of IMyService) = New ChannelFactory(Of IMyService)(remoteName) Try svcProxy.Open() Dim svc As IMyService = svcProxy.CreateChannel() nodeResult = svc.TestRemote("foo") Finally svcProxy.Close() End Try The part I'm having difficulty with is how to specify and actually invoke the actual remote method (eg "TestRemote") without having to duplicate the above code, and all the thread-related stuff that invokes that, for each method. In the end, I'd like to be able to write code along the lines of (consider this psuedo code): Dim results as Dictionary(Of Node, ExpectedReturnType) results = ParallelInvoke(IMyService.SomeMethod, parameter1, parameter2) where ParallelInvoke() will take the method as an argument, as well as the parameters (paramArray or object() .. whatever) and then go run the request on each remote node, block until they all return an answer or timeout, and then return the results into a Dictionary with the key as the node, and the value as whatever value it returned. I can then (depending on the method) pick out the single value I need, or aggregate all the values from each server together, etc. I'm pretty sure I can do this using reflection and InvokeMember(), but that requires passing the method as a string (which can lead to errors like calling a non-existing method that can't be caught at compile time), so I'd like to see if there is a cleaner way to do this. Thanks

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• Using ASP .NET Membership and Profile with MVC, how can I create a user and set it to HttpContext.Cu

  - by Jeremy Gruenwald

  I've read the other questions on the topic of MVC membership and profiles, but I'm missing something. I implemented a custom Profile object in code as described by Joel here: http://stackoverflow.com/questions/426609/asp-net-membership-how-to-assign-profile-values I can't get it to work when I'm creating a new user, however. When I do this: Membership.CreateUser(userName, password); Roles.AddUserToRole(userName, "MyRole"); the user is created and added to a role in the database, but HttpContext.Current.User is still empty, and Membership.GetUser() returns null, so this (from Joel's code) doesn't work: static public AccountProfile CurrentUser { get { return (AccountProfile) (ProfileBase.Create(Membership.GetUser().UserName)); } } AccountProfile.CurrentUser.FullName = "Snoopy"; I've tried calling Membership.GetUser(userName) and setting Profile properties that way, but the set properties remain empty, and calling AccountProfile.CurrentUser(userName).Save() doesn't put anything in the database. I've also tried indicating that the user is valid & logged in, by calling Membership.ValidateUser, FormsAuthentication.SetAuthCookie, etc., but the current user is still null or anonymous (depending on the state of my browser cookies). I have the feeling I'm missing some essential piece of understanding about how Membership, Authentication, and Profiles fit together. Do I have to do a round trip before the current User will be populated? Any advice would be much appreciated.

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• Javascript functional inheritance with prototypes

  - by cdmckay

  In Douglas Crockford's JavaScript: The Good Parts he recommends that we use functional inheritance. Here's an example: var mammal = function(spec, my) { var that = {}; my = my || {}; // Protected my.clearThroat = function() { return "Ahem"; }; that.getName = function() { return spec.name; }; that.says = function() { return my.clearThroat() + ' ' + spec.saying || ''; }; return that; } var cat = function(spec, my) { var that = {}; my = my || {}; spec.saying = spec.saying || 'meow'; that = mammal(spec, my); that.purr = function() { return my.clearThroat() + " purr"; }; that.getName = function() { return that.says() + ' ' + spec.name + ' ' + that.says(); }; return that; }; var kitty = cat({name: "Fluffy"}); The main issue I have with this is that every time I make a mammal or cat the JavaScript interpreter has to re-compile all the functions in it. That is, you don't get to share the code between instances. My question is: how do I make this code more efficient? For example, if I was making thousands of cat objects, what is the best way to modify this pattern to take advantage of the prototype object?

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• Equivalent of typedef in C#

  - by Matthew Scharley

  Is there a typedef equivalent in C#, or someway to get some sort of similar behaviour? I've done some googling, but everywhere I look seems to be negative. Currently I have a situation similar to the following: class GenericClass<T> { public event EventHandler<EventData> MyEvent; public class EventData : EventArgs { /* snip */ } // ... snip } Now, it doesn't take a rocket scientist to figure out that this can very quickly lead to alot of typing (appologies for the horrible pun) when trying to implement a handler for that event. It'd end up being something like this: GenericClass<int> gcInt = new GenericClass<int>; gcInt.MyEvent += new EventHandler<GenericClass<int>.EventData>(gcInt_MyEvent); // ... private void gcInt_MyEvent(object sender, GenericClass<int>.EventData e) { throw new NotImplementedException(); } Except, in my case, I was already using a complex type, not just an int. It'd be nice if it was possible to simplify this a little... Edit: ie. perhaps typedefing the EventHandler instead of needing to redefine it to get similar behaviour.

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• Referencing .NET Assembly in VB6 won't work

  - by dretzlaff17

  I wrote a .net assembly using c# to perform functions that will be used by both managed and unmanaged code. I have a VB6 project that now needs to use the assembly via COM. I created my .net assembly, made sure that ComVisible is set to true and that it is registered for COM interop via project properties. public class MyClass [ComVisible(true)] public string GetResponse() { return "Testing Response" } } I build the assembly and copied the file into a folder. TestInterop.dll I then run a batch file to register the assembly tool to register the object for COM. cd C:\Windows\Microsoft.NET\Framework\v4.0.30319\ regasm "c:\Program Files\TestApp\TestInterop.dll" /tlb:TestInterop.tlb I open a new VB6 application and reference TestInterop.dll In VB6 I write the following code and it compiles. Dim obj as TestInterop.MyClass Set obj = new TestInterop.MyClass Dim strTest as string strTest = obj.GetRespose() When I run the program it errors on the obj.GetResponse() line. Run-time error' -2147024894 (80070002'): Automation error The system cannot find the file specified Also, the intellesense does not work on obj. I had to type the GetResponse method. Is this normal? Does anyone have any clue what could be wrong or what steps I missed. Thanks!

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• Update a single field from a single entity with ria-services

  - by TimothyP

  There are situations where I only want to update a specific field of a single entity in the database. I loaded the entities of that type into my silverlight application, and I know they are constantly changing on the server... but there is one field which has to be set by the silverlight client... the server will only read it. How can I just send the new data for that field to the server? Example an Entity called "TextField". I have a list of TextFields loaded in the silverlight application and every now and then the user will update the Preload (string) property of an entity and that has to go back to the server without changing anything else on the server. I tried adding a simple SetPreloadText(...) method to the DomainService but that just makes Silverlight crash with some odd error code. Is there a way to this? Am I working against the idea of Silverlight here? I really don't want to send the entire object back because know that at any given time the version on the client will most likely be out of date. (which is ok for this specific application)

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• Mocking WebResponse's from a WebRequest

  - by Rob Cooper

  I have finally started messing around with creating some apps that work with RESTful web interfaces, however, I am concerned that I am hammering their servers every time I hit F5 to run a series of tests.. Basically, I need to get a series of web responses so I can test I am parsing the varying responses correctly, rather than hit their servers every time, I thought I could do this once, save the XML and then work locally. However, I don't see how I can "mock" a WebResponse, since (AFAIK) they can only be instantiated by WebRequest.GetResponse How do you guys go about mocking this sort of thing? Do you? I just really don't like the fact I am hammering their servers :S I dont want to change the code too much, but I expect there is a elegant way of doing this.. Update Following Accept Will's answer was the slap in the face I needed, I knew I was missing a fundamental point! Create an Interface that will return a proxy object which represents the XML. Implement the interface twice, on that uses WebRequest, the other that returns static "responses". The interface implmentation then either instantiates the return type based on the response, or the static XML. You can then pass the required class when testing or at production to the service layer. Once I have the code knocked up, I'll paste some samples. Thanks Will :)

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• How to change the Struts2 validation error message in the case of an invalid field value?

  - by FarmBoy

  I'm using Struts2 validation on a web form. In the case that a field is suppose to be an integer or Date, the <s:fielderror> message I receive is a generic Invalid field value for field "[fieldname]" Naturally, I want to customize this for the user. Here's an example validation: <field name="spouseDOB"> <field-validator type="date"> <message>"Spouse Date of Birth" is invalid.</message> </field-validator> <field-validator type="date"> <param name="min">01/01/1900</param> <message>"Spouse Date of Birth" must be after 1900 AD. </field-validator> </field> The message "Spouse Date of Birth" is invalid. never appears, for any invalid date that I have tried. The output is the generic Invalid field value for field spouseDOB spouseDOB is a java.util.Date object in the action class. It is set by a <s:textfield> in the JSP.

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• Constant NSDictionary/NSArray for class methods.

  - by Jeff B

  I am trying to code a global lookup table of sorts. I have game data that is stored in character/string format in a plist, but which needs to be in integer/id format when it is loaded. For instance, in the level data file, a "p" means player. In the game code a player is represented as the integer 1. This let's me do some bitwise operations, etc. I am simplifying greatly here, but trying to get the point across. Also, there is a conversion to coordinates for the sprite on a sprite sheet. Right now this string-integer, integer-string, integer-coordinate, etc. conversion is taking place in several places in code using a case statement. This stinks, of course, and I would rather do it with a dictionary lookup. I created a class called levelInfo, and want to define the dictionary for this conversion, and then class methods to call when I need to do a conversion, or otherwise deal with level data. NSString *levelObjects = @"empty,player,object,thing,doohickey"; int levelIDs[] = [0,1,2,4,8]; // etc etc @implementation LevelInfo +(int) crateIDfromChar: (char) crateChar { int idx = [[crateTypes componentsSeparatedByString:@","] indexOfObject: crateChar]; return levelIDs[idx]; } +(NSString *) crateStringFromID: (int) crateID { return [[crateTypes componentsSeparatedByString:@","] objectAtIndex: crateID]; } @end Is there a better way to do this? It feels wrong to basically build these temporary arrays, or dictionaries, or whatever for each call to do this translation. And I don't know of a way to declare a constant NSArray or NSDictionary. Please, tell me a better way....

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• -[CFString length]: message sent to deallocated instance 0x3881940 when i scroll to near the bottom

  - by James

  Hey guys, i've got a problem debugging an iphone app that i'm attempting to write and it's got me stumped, bear with me, i'm a n00b to programming and might get some of the terminology wrong but i'll try to explain it as best as i can. The app gets an XML doc from the a web site, parses it into an array, and then displays it in a table view, i have the parser in a separate file. The ViewDidLoad in RootViewController sends it a url, the parser goes to work and then returns an NSMutableArray. When i run the app it works fine with small XML files (5 entries or so, and 1-3 sections), but when i use a larger one(20+ rows, over 12 sections) i get the error "-[CFString length]: message sent to deallocated instance 0x3881940" when i scroll near the bottom of the tableview, just as the last section title is about to come onto the viewable area on the screen to be precise. if i return a static string instead of the object in my array in this method it doesn't crash, but i can use NSLog to call the array and it returns the title no problems. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)indexPath { return [[returnedEvents objectAtIndex:indexPath ] objectAtIndex:0]; } The returnedEvents array isn't released until -(void) dealloc {} I have read a few other posts on here, and a few guides on debugging and as of yet am unable to find anything that was able to help me, i'd be more than happy to post some code up here and any more information, i'm just not sure where to start... Thanks in advance for anyone willing to have a go at helping me out.

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• Android: writing a file to sdcard

  - by Sumit M Asok

  I'm trying to write a file from an Http post reply to a file on the sdcard. Everything works fine until the byte array of data is retrieved. I've tried setting WRITE_EXTERNAL_STORAGE permission in the manifest and tried many different combinations of tutorials I found on the net. All I could find was using the openFileOutput("",MODE_WORLD_READABLE) method, of the activity but how my app writes file is by using a thread. Specifically, a thread is invoked from another thread when a file has to be written, so giving an activity object didn't work even though I tried it. The app has come a long way and I cannot change how the app is currently written. Please, someone help me? CODE: File file = new File(bgdmanip.savLocation); FileOutputStream filecon = null; filecon = new FileOutputStream(file); // bgdmanip.savLocation holds the whole files path byte[] myByte; myByte = Base64Coder.decode(seReply); Log.d("myBytes", String.valueOf(myByte)); bos.write(myByte); filecon.write(myByte); myvals = x * 11024; seReply is a string reply from HttpPost response. the second set of code is looped with reference to x. the file is created but remains 0 bytes

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• [C#]Problem with dynamic create tabPages in TabControl

  - by mirt

  Hello, I want to create dynamic tabPages in TabControl. In each tabPage I create dataGridView and i want to fill the entire space of each tabPage with this dataGrid. Here is code, where i do this: private void tabControlMutants_SelectedIndexChanged(object sender, EventArgs e) { DataGridView dgw = new DataGridView(); DataGridViewTextBoxColumn testCaseCol = new System.Windows.Forms.DataGridViewTextBoxColumn(); DataGridViewTextBoxColumn resultCol = new System.Windoows.Forms.DataGridViewTextBoxColumn(); // // dataGridView1 // dgw.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; dgw.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] { testCaseCol, resultCol}); dgw.Location = new System.Drawing.Point(3, 3); dgw.Name = "dataGridView1"; dgw.AutoSize = true; dgw.Dock = System.Windows.Forms.DockStyle.Fill; dgw.TabIndex = 0; // // TestCaseColumn // testCaseCol.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill; testCaseCol.HeaderText = "Test Case"; testCaseCol.Name = "TestCaseColumn"; // // ResultColumn // resultCol.HeaderText = "Result"; resultCol.Name = "ResultColumn"; tabControlMutants.TabPages[(sender as TabControl).SelectedIndex].Controls.Add(dgw); ((System.ComponentModel.ISupportInitialize)(dgw)).EndInit(); //fill dataGridView } But it doesn't work, becouse when i resize the main window, data gridView doesn.t change its size (although the dock property is set to fill). Any ideas?

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• Android ViewPager Displaying TextView in Layout

  - by Ammonious

  I'm having a problem getting my viewpager to work correctly. Currently the bottom part of my layout will page across but the remaining part will not Here's my code that I have in my PageAdapter public class MyPageAdapter extends PagerAdapter { public int getCount() { return 31; } public Object instantiateItem(View collection, int position) { LayoutInflater inflater = (LayoutInflater) collection.getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); int resId = 0; switch (position) { case 0: resId = R.layout.main_menu; break; case 1: resId = R.layout.article1; break; case 2: resId = R.layout.article2; break; .... .... View view = inflater.inflate(resId, null); ((ViewPager) collection).addView(view, 0); return view; This is what I have for my XML <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="@drawable/background" android:clickable="true" android:id="@+id/layout13" android:weightSum="0"> <TextView android:id="@+id/textView01" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical|center_horizontal" android:padding="12dp" android:text="@string/article13" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="#000000" /> <TextView android:id="@+id/textView02" android:layout_width="match_parent" android:layout_height="302dp" android:gravity="center_vertical|center_horizontal" android:text="@string/body13" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="#000000" /> <android.support.v4.view.ViewPager android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@id/viewPager" > </android.support.v4.view.ViewPager> </LinearLayout> I've tried Moving the around in my XML layout to right underneath my LinearLayout and i get the full screen but all my text disappears. It's probably something simple i'm missing but any help on this would be greatly appreciated!

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• SelectMany in Linq to entity

  - by Brazeta

  I was looking at some examples in microsoft site about linq and I see an example that I need to modify! http://msdn.microsoft.com/en-us/vcsharp/aa336758.aspx#SelectManyCompoundfrom3 public void Linq16() { List customers = GetCustomerList(); var orders = from c in customers from o in c.Orders where o.OrderDate >= new DateTime(1998, 1, 1) select new { c.CustomerID, o.OrderID, o.OrderDate }; ObjectDumper.Write(orders); } Insted of having a select that retrives the CustomerID, OrderID and OrderDate I want to select the CustomerID and a System.Collection.Generic.List that contains all the orders for that user! Essentially I want to group my orders by CustomerID, but i noticed that linq to entity does not allow a .ToList(object) inside the select. I want something like this... List customers = GetCustomerList(); var orders = from c in customers from o in c.Orders where o.OrderDate >= new DateTime(1998, 1, 1) select new xpto { TheCostumerID = c.CustomerID, CostumerOrders = o.Select(i=>i.OrderID).ToList(), }; ...but the .ToList() is a big problem, at least for me. I'm trying to find out the solution for that but so far I have acomplished nothing! Please help me.

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• Search in Stack

  - by WPS

  Hi, I've a Java Stack created and some custom objects added to it. These objects contains unique id as one of their field. I need to get the index of that object in stack based on the unique name. Please find the example. class TestVO{ private String name; private String uniqueId; //getters and setters } public class TestStack{ public static void main(String args[]){ TestVO vo1=new TestVO(); TestVO vo2=new TestVO(); TestVO vo3=new TestVO(); vo1.setName("Test Name 1") vo1.setId("123") vo2.setName("Test name 2"); vo2.setId("234"); Stack<TestVO> stack=new Stack<TestVO>(); stack.add(vo1); stack.add(vo2); //I need to get the index of a VO from stack using it's unique ID } } Can someone please help me to implement this?

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