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  • What should programmers practice every day?

    - by Jacinda S
    Musicians practice scales, arpeggios, etc. every day before they begin playing "real" music. The top sports players spend time every day practicing fundamentals like dribbling before playing the "real" game. Are there fundamentals that programmers should practice every day before writing "real" code?

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  • Specifying a variable name in QUERY WHERE clause in JDBC

    - by Noona
    Could someone please give me a link on how to create a query in JDBC that gets a variable name in the WHERE statement, or write an example, to be more specific, my code looks something like this: private String getLastModified(String url) { String lastModified = null; ResultSet resultSet; String query = "select LastModified from CacheTable where " + " URL.equals(url)"; try { resultSet = sqlStatement.executeQuery(query); } Now I need the syntax that enables me to return a ResultSet object where URL in the cacheTable equals url from the method's argument. thanks

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  • Am I using Settings in C# correctly?

    - by Sergio Tapia
    Here's what I'm doing. I have three properties: MomsBackground, DadsBackground and ChosenBackground. When Momsbackground is selected in the program, I set the ChosenBackground string according to what item the user has clicked (either "Mom" or "Dad"). Then on Form_Load() I use a switch case for the ChosenBackground string and according to that select This.BackgroundColor to MomsBackground or DadsBackground. Code below: Am I using this as it was intended?

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  • Django & google openid authentication with socialauth

    - by Zayatzz
    Hello I am trying to use django-socialauth (http://github.com/uswaretech/Django-Socialauth) for authenticating users for my django project. This is firs time working with openid and i've had to figure out how exactly this open id works. I have more or less understood it, by now, but there are few things that elude me. The authentication process starts when the request is put together in in django-socialauth.openid_consumer.views.begin. I can see that the outgoing authentication request is more or less something like this: https://www.google.com/accounts/o8/ud?openid.assoc_handle=AOQobUckRThPUj3K1byG280Aze-dnfc9Iu6AEYaBwvHE11G0zy8kY8GZ& openid.ax.if_available=fname& openid.ax.mode=fetch_request& openid.ax.required=email& openid.ax.type.email=http://axschema.org/contact/email& openid.ax.type.fname=http://example.com/schema/fullname& openid.claimed_id=http://specs.openid.net/auth/2.0/identifier_select& openid.identity=http://specs.openid.net/auth/2.0/identifier_select& openid.mode=checkid_setup&openid.ns=http://specs.openid.net/auth/2.0& openid.ns.ax=http://openid.net/srv/ax/1.0& openid.ns.sreg=http://openid.net/extensions/sreg/1.1& openid.realm=http://localhost/& openid.return_to=http://localhost/social/gmail_login/complete/?janrain_nonce=2010-03-20T11%3A19%3A44ZPZCjNc&openid.sreg.optional=postcode,country,nickname,email This is lot like 2nd example here: http://code.google.com/apis/accounts/docs/OpenID.html#Samples The problem is, that the request, i get back, is nothing like the corresponding example from code.google.com (look at the 3rd example in example responses. Response dict i get is like this: { 'openid.op_endpoint': 'https://www.google.com/accounts/o8/ud', 'openid.sig': 'QWMa4x4ruMUvSCfLwKV6CZRuo0E=', 'openid.ext1.type.email': 'http://axschema.org/contact/email', 'openid.return_to': 'http://localhost/social/gmail_login/complete/?janrain_nonce=2010-03-20T17%3A54%3A06ZHV4cqh', 'janrain_nonce': '2010-03-20T17:54:06ZHV4cqh', 'openid.response_nonce': '2010-03-20T17:54:06ZdC5mMu9M_6O4pw', 'openid.claimed_id': 'https://www.google.com/accounts/o8/id?id=AItOghawkFz0aNzk91vaQWhD-DxRJo6sS09RwM3SE', 'openid.mode': 'id_res', 'openid.ns.ext1': 'http://openid.net/srv/ax/1.0', 'openid.signed': 'op_endpoint,claimed_id,identity,return_to,response_nonce,assoc_handle,ns.ext1,ext1.mode,ext1.type.email,ext1.value.email', 'openid.ext1.value.email': '[email protected]', 'openid.assoc_handle': 'AOQobUfssTJ2IxRlxrIvU4Xg8HHQKKTEuqwGxvwwuPR5rNvag0elGlYL', 'openid.ns': 'http://specs.openid.net/auth/2.0', 'openid.identity': 'https://www.google.com/accounts/o8/id?id=AItOawkghgfhf1FkvaQWhD-DxRJo6sS09RwMKjASE', 'openid.ext1.mode': 'fetch_response'} The socialauth itself has been built to accept my email address this way: elif request.openid and request.openid.ax: email = request.openid.ax.get('email') And obviously this fails. Why i am asking all this is, that perhaps i am doing something wrong and my outgoing request is wrong? Or am i doing all correctly and should change the socialaouth module to accept info in a new way and then commit the change? Alan

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  • PHP Equivalent of Java Type-Casting Solution

    - by stjowa
    Since PHP has no custom-class type-casting, how would I go about doing the PHP equivalent of this Java code: CustomBaseObject cusBaseObject = cusBaseObjectDao.readCustomBaseObjectById(id); ((CustomChildObject) cusBaseObject).setChildAttribute1(value1); ((CustomChildObject) cusBaseObject).setChildAttribute2(value2); In my case, it would very nice if I could do this. However, trying this without type-casting support, it gives me an error that the methods do not exist for the object. Thanks, Steve

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  • How to reuse layouts in WPF

    - by Ingó Vals
    I'm trying to create a application that will be tabbed where each tab will have a button area and a view area. Now each tab will essentially have the same layout just different things in the layout and I wanted to be able to reuse the same layout so that I won't have to change at many places ( it's just not good programming ). Can I accomplish this using resources or perhaps Styles. Please supply a light code example if possible.

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  • Linq-to-sql Compiled Query returning object NOT belonging to submitted DataContext

    - by Vladimir Kojic
    Compiled query: public static class Machines { public static readonly Func<OperationalDataContext, short, Machine> QueryMachineById = CompiledQuery.Compile((OperationalDataContext db, short machineID) => db.Machines.Where(m => m.MachineID == machineID).SingleOrDefault() ); public static Machine GetMachineById(IUnitOfWork unitOfWork, short id) { Machine machine; // Old code (working) //var machineRepository = unitOfWork.GetRepository<Machine>(); //machine = machineRepository.Find(m => m.MachineID == id).SingleOrDefault(); // New code (making problems) machine = QueryMachineById(unitOfWork.DataContext, id); return machine; } It looks like compiled query is caching Machine object and returning the same object even if query is called from new DataContext (I’m disposing DataContext in the service but I’m getting Machine from previous DataContext). I use POCOs and XML mapping. Revised: It looks like compiled query is returning result from new data context and it is not using the one that I passed in compiled-query. Therefore I can not reuse returned object and link it to another object obtained from datacontext thru non compiled queries. [TestMethod] public void GetMachinesTest() { // Test Preparation (not important) using (var unitOfWork = IoC.Get<IUnitOfWork>()) { var machineRepository = unitOfWork.GetRepository<Machine>(); // GET ALL List<Machine> list = machineRepository.FindAll().ToList<Machine>(); VerifyIntegratedMachine(list[2], 3, "Machine 3", "333333", "G300PET", "MachineIconC.xaml", false, true, LicenseType.Licensed, "10.0.97.3", "10.0.97.3", 0); var machine = Machines.GetMachineById(unitOfWork, 3); Assert.AreSame(list[2], machine); // PASS !!!! } using (var unitOfWork = IoC.Get<IUnitOfWork>()) { var machineRepository = unitOfWork.GetRepository<Machine>(); // GET ALL List<Machine> list = machineRepository.FindAll().ToList<Machine>(); VerifyIntegratedMachine(list[2], 3, "Machine 3", "333333", "G300PET", "MachineIconC.xaml", false, true, LicenseType.Licensed, "10.0.97.3", "10.0.97.3", 0); var machine = Machines.GetMachineById(unitOfWork, 3); Assert.AreSame(list[2], machine); // FAIL !!!! } } If I run other (complex) unit tests I'm getting as expected: An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext.

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  • ASP.NET MVC: Implementing an OpenID sign-in page ala NerdDinner v2

    - by pcampbell
    Consider the log in page on NerdDinner.com: http://www.nerddinner.com/Account/LogOn Some nice features: jQuery effects on the OpenID choice popups for the other major providers Is this revision of the NerdDinner AccountController and its View available for public download? How would you reinvent this implementation? Any code you can post would be fine. Calling Jon Galloway!

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  • Examples of Hierarchical-Model-View-Controller (HMVC)?

    - by Stephen
    Hi, I'm interested in the Presentation-Abstraction-Control? (aka Hierarchical-Model-View-Controller (HMVC)) Architectural Pattern for constructing complex user interfaces (GUI or web) and was wondering if anyone was aware of any examples in the wild where I could read the code? My list so far; Cairngorm framework for Adobe Flex any others I'm aware of the JavaWorld article and associated letters cited in the wikipedia article http://en.wikipedia.org/wiki/Presentation-abstraction-control

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  • Error while accessing the Informatica web service methods

    - by Sabeer Ali
    Hi, I am facing the error "This represents an internal error at the Informatica PowerCenter Web Services Hub. error code is : WSH_95000" while access the informatica web services methods.I am able to login and able to get the sessionid provided by the login response. I am passing the same session id for every SOAP call. But able to initializeDIserverConnection, unable to do any other calls in DI services. Please help me if anyone knows the resolution. Regards, Sabeer

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  • jqgrid problem:Where is the "filter" param?

    - by davykiash
    Am curently looking at the jqgrid documentation on advanced search and specifically search_adv.php file that comes with it. I have noted the following line of code $searchstr = Strip($_REQUEST['filters']); However when I look at the output on firebug of my jqgrid post I see _search true nd 1270148130165 page 1 rows 10 searchField income_types_desc searchOper eq searchString 5 sidx income_types_desc sord asc Where on earth is the "filter" param?

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  • Android and obfuscation

    - by kape123
    Is there anyone here who have real-world experience on this topic and is willing to share his experiences on subject? Links to guides/code/step-by-step instructions are highly appreciated. Thanks!

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  • disable radio button group in flash

    - by c11ada
    hey all, im trying to disable a radio button group in flash, so users cant change the selected item. im using the following code to create the radio button var rbuttongroup:RadioButtonGroup=new RadioButtonGroup("radioGroup"); then adding radio buttons to it on the fly, my question is how do i go about disabling the radio buttons ? thanks

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  • Converting to async,await using async targeting package

    - by e4rthdog
    I have this: private void BtnCheckClick(object sender, EventArgs e) { var a = txtLot.Text; var b = cmbMcu.SelectedItem.ToString(); var c = cmbLocn.SelectedItem.ToString(); btnCheck.BackColor = Color.Red; var task = Task.Factory.StartNew(() => Dal.GetLotAvailabilityF41021(a, b, c)); task.ContinueWith(t => { btnCheck.BackColor = Color.Transparent; lblDescriptionValue.Text = t.Result.Description; lblItemCodeValue.Text = t.Result.Code; lblQuantityValue.Text = t.Result.AvailableQuantity.ToString(); },TaskScheduler .FromCurrentSynchronizationContext() ); LotFocus(true); } and i followed J. Skeet's advice to move into async,await in my .NET 4.0 app. I converted into this: private async void BtnCheckClick(object sender, EventArgs e) { var a = txtLot.Text; var b = cmbMcu.SelectedItem.ToString(); var c = cmbLocn.SelectedItem.ToString(); btnCheck.BackColor = Color.Red; JDEItemLotAvailability itm = await Task.Factory.StartNew(() => Dal.GetLotAvailabilityF41021(a, b, c)); btnCheck.BackColor = Color.Transparent; lblDescriptionValue.Text = itm.Description; lblItemCodeValue.Text = itm.Code; lblQuantityValue.Text = itm.AvailableQuantity.ToString(); LotFocus(true); } It works fine. What confuses me is that i could do it without using Task but just the method of my Dal. But that means that i must have modified my Dal method, which is something i dont want? I would appreciate if someone would explain to me in "plain" words if what i did is optimal or not and why. Thanks P.s. My dal method public bool CheckLotExistF41021(string _lot, string _mcu, string _locn) { using (OleDbConnection con = new OleDbConnection(this.conString)) { OleDbCommand cmd = new OleDbCommand(); cmd.CommandText = "select lilotn from proddta.f41021 " + "where lilotn = ? and trim(limcu) = ? and lilocn= ?"; cmd.Parameters.AddWithValue("@lotn", _lot); cmd.Parameters.AddWithValue("@mcu", _mcu); cmd.Parameters.AddWithValue("@locn", _locn); cmd.Connection = con; con.Open(); OleDbDataReader rdr = cmd.ExecuteReader(); bool _retval = rdr.HasRows; rdr.Close(); con.Close(); return _retval; } }

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  • Debugging on an iPhone device

    - by Mike Rychev
    I have a developer license and I've generated .mobileprovision and .cer files. I've put the provision file on my device, double-clicked the .cer file and added it to the login keychain. But when I'm trying to build the app in XCode, I get the error: CodeSign error: code signing is required for product type 'Application' in SDK 'Device - iPhone OS 3.1.3' What am I doing wrong? Thanks in advance!

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  • Pointer to NSWindow Xib after loading it?

    - by Brock Woolf
    In my code below, CustomWindow is a subclass of NSWindow. CustomWindow *window = [[CustomWindow alloc] init]; if (![NSBundle loadNibNamed:@"NibName" owner:window]) [window center]; // doesn't work How do you get a pointer to control your XIB after you load it so you can do things such as centering the XIB? What am i doing wrong here?

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  • Optimizing multiple dispatch notification algorithm in C#?

    - by Robert Fraser
    Sorry about the title, I couldn't think of a better way to describe the problem. Basically, I'm trying to implement a collision system in a game. I want to be able to register a "collision handler" that handles any collision of two objects (given in either order) that can be cast to particular types. So if Player : Ship : Entity and Laser : Particle : Entity, and handlers for (Ship, Particle) and (Laser, Entity) are registered than for a collision of (Laser, Player), both handlers should be notified, with the arguments in the correct order, and a collision of (Laser, Laser) should notify only the second handler. A code snippet says a thousand words, so here's what I'm doing right now (naieve method): public IObservable<Collision<T1, T2>> onCollisionsOf<T1, T2>() where T1 : Entity where T2 : Entity { Type t1 = typeof(T1); Type t2 = typeof(T2); Subject<Collision<T1, T2>> obs = new Subject<Collision<T1, T2>>(); _onCollisionInternal += delegate(Entity obj1, Entity obj2) { if (t1.IsAssignableFrom(obj1.GetType()) && t2.IsAssignableFrom(obj2.GetType())) obs.OnNext(new Collision<T1, T2>((T1) obj1, (T2) obj2)); else if (t1.IsAssignableFrom(obj2.GetType()) && t2.IsAssignableFrom(obj1.GetType())) obs.OnNext(new Collision<T1, T2>((T1) obj2, (T2) obj1)); }; return obs; } However, this method is quite slow (measurable; I lost ~2 FPS after implementing this), so I'm looking for a way to shave a couple cycles/allocation off this. I thought about (as in, spent an hour implementing then slammed my head against a wall for being such an idiot) a method that put the types in an order based on their hash code, then put them into a dictionary, with each entry being a linked list of handlers for pairs of that type with a boolean indication whether the handler wanted the order of arguments reversed. Unfortunately, this doesn't work for derived types, since if a derived type is passed in, it won't notify a subscriber for the base type. Can anyone think of a way better than checking every type pair (twice) to see if it matches? Thanks, Robert

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  • Help finding longest non-repeating path through connected nodes - Python

    - by Jordan Magnuson
    I've been working on this for a couple of days now without success. Basically, I have a bunch of nodes arranged in a 2D matrix. Every node has four neighbors, except for the nodes on the sides and corners of the matrix, which have 3 and 2 neighbors, respectively. Imagine a bunch of square cards laid out side by side in a rectangular area--the project is actually simulating a sort of card/board game. Each node may or may not be connected to the nodes around it. Each node has a function (get_connections()), that returns the nodes immediately around it that it is connected to (so anywhere from 0 to 4 nodes are returned). Each node also has an "index" property, that contains it's position on the board matrix (eg '1, 4' - row 1, col 4). What I am trying to do is find the longest non-repeating path of connected nodes given a particular "start" node. I've uploaded a couple of images that should give a good idea of what I'm trying to do: In both images, the highlighted red cards are supposedly the longest path of connected cards containing the most upper-left card. However, you can see in both images that a couple of cards that should be in the path have been left out (Romania and Maldova in the first image, Greece and Turkey in the second) Here's the recursive function that I am using currently to find the longest path, given a starting node/card: def get_longest_trip(self, board, processed_connections = list(), processed_countries = list()): #Append this country to the processed countries list, #so we don't re-double over it processed_countries.append(self) possible_trips = dict() if self.get_connections(board): for i, card in enumerate(self.get_connections(board)): if card not in processed_countries: processed_connections.append((self, card)) possible_trips[i] = card.get_longest_trip(board, processed_connections, processed_countries) if possible_trips: longest_trip = [] for i, trip in possible_trips.iteritems(): trip_length = len(trip) if trip_length > len(longest_trip): longest_trip = trip longest_trip.append(self) return longest_trip else: print card_list = [] card_list.append(self) return card_list else: #If no connections from start_card, just return the start card #as the longest trip card_list = [] card_list.append(board.start_card) return card_list The problem here has to do with the processed_countries list: if you look at my first screenshot, you can see that what has happened is that when Ukraine came around, it looked at its two possible choices for longest path (Maldova-Romania, or Turkey, Bulgaria), saw that they were both equal, and chose one indiscriminantly. Now when Hungary comes around, it can't attempt to make a path through Romania (where the longest path would actually be), because Romania has been added to the processed_countries list by Ukraine. Any help on this is EXTREMELY appreciated. If you can find me a solution to this, recursive or not, I'd be happy to donate some $$ to you. I've uploaded my full source code (Python 2.6, Pygame 1.9 required) to: http://www.necessarygames.com/junk/planes_trains.zip The relevant code is in src/main.py, which is all set to run.

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  • Drupal - Grabbing and Looping NID of CCK Nodereference field

    - by GaxZE
    Hello, cant seem to work out how i grab multiple nids of a node reference field. $node-field_name[0]['nid'] picks up the node id of the cck node reference field. however when that cck node reference field has more than one value i get stuck! my php is abit sketchy atm so working with arrays and loops is being quite difficult! here is my code: field_industry as $item) { ? "

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  • How can I drop a SqlServer Backup Device using SMO in C#?

    - by C-Pound Guru
    I can drop a SqlServer Backup Device using SQL-DMO using the following pseudo-code: SQLDMO.SQLServer2 server = New SQLDMO.SQLServer2(); server.Connect("myserver"); server.BackupDevices.Remove("mybackupdevice"); File.Delete("mybackupdevicephysicallocation"); SMO.Server.BackupDevices does not appear to have a Remove() method, so how can I drop a BackupDevice using SMO?

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