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  • MySQLdb not INSERTING, _mysql does fine.

    - by Mad_Casual
    Okay, I log onto the MySQL command-line client as root. I then open or otherwise run a python app using the MySQLdb module as root. When I check the results using python (IDLE), everything looks fine. When I use the MySQL command-line client, no INSERT has occurred. If I change things around to _mysql instead of MySQLdb, everything works fine. I'd appreciate any clarification(s). "Works" until IDLE/Virtual machine is reset: <pre><code>import MySQLdb db = MySQLdb.connect(user='root', passwd='*******',db='test') cursor = db.cursor() cursor.execute("""INSERT INTO test VALUES ('somevalue');""",)</code></end> Works: <pre><code>import _mysql db = _mysql.connect(user='root', passwd='*******',db='test') db.query("INSERT INTO test VALUES ('somevalue');")</code></end> System info: Intel x86 WinXP Python 2.5 MySQL 5.1.41 MySQL-Python 1.2.2

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  • How to dynamically replace a method implementation in ObjC2?

    - by Abhi
    I am trying to learn how to write plugins using SIMBL. I got my plugin to load with the target application, and also know the method that I wish to override. However, I am not able to use class_getInstanceMethod correctly based on snippets on the Internet. Have things changed in OSX 10.6 and/or ObjC2? The following code from culater.net gives "Dereferencing pointer to incomplete type" on the second-last statement: BOOL DTRenameSelector(Class _class, SEL _oldSelector, SEL _newSelector) { Method method = nil; // First, look for the methods method = class_getInstanceMethod(_class, _oldSelector); if (method == nil) return NO; method->method_name = _newSelector; return YES; } Is there a complete example of how to override a method using SIMBL plugins? Thanks!

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  • Clustering and DB Replication in virtualized (and cloud) environments

    - by devdude
    Both replication and clustering are terms for servers setups with physical (real) servers, usually implemented on a DB or AS level. Now the question: In a virtualized environment with "easy" scalable servers (touching clustering) and a higher availability (DB replication) through the means of high availability of the virtual server by the cloudserver provider, do we really need replication and clustering (as in covering the problems of traditional servers) ? Question is asked from a soultion/application provider viewpoint. Please exclude the need of replication with a business requirement background, eg. the need to replicate a DB at 2 different geographical locations to ensure performance and data. Thanks for your insights !

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  • SYN flooding still a threat to servers?

    - by Rob
    Well recently I've been reading about different Denial of Service methods. One method that kind of stuck out was SYN flooding. I'm a member of some not-so-nice forums, and someone was selling a python script that would DoS a server using SYN packets with a spoofed IP address. However, if you sent a SYN packet to a server, with a spoofed IP address, the target server would return the SYN/ACK packet to the host that was spoofed. In which case, wouldn't the spoofed host return an RST packet, thus negating the 75 second long-wait, and ultimately failing in its attempt to DoS the server?

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  • Equivalent of describeType for Flex Component EVENTS

    - by Joshua
    Using "introspection" In Flex I can say: var classInfo:XML=describeType(SomeObject); Which will list for me the Accessors, Methods And Variables. (http://livedocs.adobe.com/flex/3/html/help.html?content=usingas_8.html) But what is the equivalent to programmatically inspect all of an object's possible EVENTS? (NOT JUST the events for which event listeners have been set, but to somehow step through a list of all VALID EVENTS for which event listeners may POTENTIALLY be set -- I realize that such lists are readily available online, and that's great for cases when I know the object's type at design type, but I require some way to inspect any given displayobject programmatically at runtime, and determine what events, if any, are or may be associated with it.)

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  • How is it that the abstract class XmlWriter can be instantiated using XmlWriter.Create(... ?

    - by Cognize
    Hi, Just looking to clarify my understanding of the workings of the XmlWriter and abstract classes in general. My thinking is (was) that an abstract class can not be instantiated, although it can contain base methods that can be used by an inheriting class. So, while investigating XmlWriter, I find that to instantiate the XmlWriter, you call XmlWriter.Create(.... , which returns an instance of... XmlWriter, which can then be used: FileStream fs = new FileStream("XML.xml", FileMode.Create); XmlWriter w = XmlWriter.Create(fs); XmlSerializer xmlSlr = new XmlSerializer(typeof(TestClass)); xmlSlr.Serialize(fs, tsIn); This clearly works, as tested. Can anyone help me understand what is going on here. As far as I can see there is or should be no 'instance' to work with here??

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  • Call method with parameters after animation completion

    - by Jean
    I want to call a method with certain parameters once an animation is done. The flow is something like this: -(void) myMethod:(int)val { [self performAnimation]; [self doSomethingElse:val]; // This should be done after animation completion } I presume the 'doSomethingElse' method needs to be called from the method defined in 'setAnimationDidStopSelector' - or is there a way to have the animation block until done? What is the best way to let the method called on 'setAnimationDidStopSelector' know about the method it needs to call and its parameter? Can this be done with selectors? Or is the only way of doing this by storing the methods and its params in class temp variables and access them when needed?

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  • Code editor with autocomplete

    - by Andrey
    I need to create a code editor for my own simple language: className.MethodName(parameterName = 2, ... ) I've created the appropriate grammar and autogenerate parser using ANTLR tool. Now I would like to have an autocomplete for class, method, variables and parameter names. This list should be context dependent, f.e. for "class." it should display methods and for "class.Method(" - parameters. I was going to parse the text and display the list depending on in which node the cursor is. The problem is that for incomplete code like "aaa.bbb(" the parser produces an error instead of a syntax tree. Any idea how to solve this problem? Maybe I'm on the wrong way and I shouldn't parse code to display autocomplete?

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  • Best way to check for null values in Java?

    - by Arty-fishL
    I need to check whether the function of an object returns true or false in Java, but that object may be null, so obviously then the function would throw a NullPointerException. This means I need to check if the object is null before checking the value of the function. What is the best way to go about this? I've listed some methods I considered, I just want to know the most sensible one, the one that is best programming practice for Java (opinion?). // method 1 if (foo != null) { if (foo.bar()) { etc... } } // method 2 if (foo != null ? foo.bar() : false) { etc... } // method 3 try { if (foo.bar()) { etc... } } catch (NullPointerException e) { } // method 4 // would this work all the time, would it still call foo.bar()? if (foo != null && foo.bar()) { etc... }

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  • Redirect Using htaccess

    - by manyxcxi
    I am trying to redirect /folder to / using .htaccess but all am I getting is the Apache HTTP Server Test Page. My root directory looks like this: / .htaccess -/folder -/folder2 -/folder3 My .htaccess looks like this: RewriteEngine On RewriteCond %{REQUEST_URI} !^/folder/ RewriteRule ^(.*)$ folder/$1 [L] What am I doing wrong? I checked my httpd.conf (I'm running Centos 5.3) and the mod_rewrite library is being loaded. As a side note, my server is not a www server, its simply a virtual machine so its hostname is centosvm. Addition: I have found that the mod_rewrite module is loaded, but none of my .htaccess redirects seem to be working.

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  • TableAdapter to return ONLY selected columns? (VS2008)

    - by MattSlay
    (VS2008) I'm trying to configure a TableAdapter in a Typed DataSet to return only a certain subset of columns from the main schema of the table on which it is based, but it always returns the entire schema (all columns) with blank values in the columns I have omitted. The TableAdpater has the default Fill and GetData() methods that come from the wizard, which contain every column in the table, which is fine. I then added a new parameterized query method called GetActiveJobsByCustNo(CustNo), and I only included a few columns in the SQL query that I actually want to be in this table view. But, again, it returns all the columns in the master table schema, with empty values for the columns I omitted. The reason I am wanting this, is so I can just get a few columns back to use that table view with AutoGenerateColumns in an ASP.NET GridView. With it giving me back EVERY column i nthe schema, my presentation GridView contains way more columns that I want to show th user. And, I want to avoid have to declare the columns in the GridView.

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  • allowDefinition='MachineToApplication' error when publishing from VS2010 (but only after a previous

    - by burnt_hand
    I can run my Asp.Net MVC 2 application without an issue on my local computer. Just Run / Debug. But if I have already built it, I can't publish it! I have to clean the solution and publish it again. I know this is not system critical, but it's really annoying. "One Click Publish" is not "Clean solution and then One click publish" The exact error is as follows: Error 11 It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. I suspect it's something to do with the Web.Config in the Views folder, but then why only after I build once previously. And just to note, the app works fine once published.

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  • Most Efficient Way of calling an external webservice in Java?

    - by Sudheer
    In one of our applications we need to call the Yahoo Soap Webservice to Get Weather and other related info. I used the wsdl2java tool from axis1.4 and generated th required stubs and wrote a client. I use jsp's use bean to include the client bean and call methods defined in the client which call the yahoo webservice inturn. Now the problem: When users make calls to the jsp the response time of the webservice differs greatly, like for one user it took less then 10 seconds and the other in the same network took more than a minute. I was just wondering if Axis1.4 queues the requests even though the jsps are multithreaded. And finally is there an efficient way of calling the webservice(Yahoo weather). Typically i get around 200 simultaneous requests from my users.

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  • SqlCommand.Paramaters.AddWithValue issue

    - by Petrus
    Hi I have a problem with the folowwing piece of code. I am passing a parameter (List) to a methods executing the following code. When it executes sql throws an error saying that the proc expects a parameter that was not provided. I know this error and understand it, and when stepping through the code I can see that the cmdExecuteReader object has a collection of parameters, with the correct naame and value. What cou be the problem? public SqlDataReader ExecuteReader(string storedProcedure, List<SqlParameter> parameters = null) { SqlCommand cmdExecuteReader = new SqlCommand() { CommandType = System.Data.CommandType.Text, Connection = conn, CommandText = storedProcedure }; if (parameters != null) { foreach (SqlParameter param in parameters) { cmdExecuteReader.Parameters.AddWithValue(param.ParameterName, param.Value); } } if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); return cmdExecuteReader.ExecuteReader(); }

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  • Android:Android SDK and AVD Manager doesn't launch after did SDK upgrade?

    - by user187532
    Hi folks, I have Android development eclipse setup on Mac OS X. I recently did Android SDK upgrade from 1.5 to available versions such as 1.6, 2.0.1 and 2.1 and docs. After did upgrade, automatically restarted my Macbook and installed all new versions. After this, when i try to launch "Windows-Android SDK and AVD Manager", it doesn't launch at all. What might be the reason? Does anyone has the solution? The reason why i'm trying to launch Android SDK and AVD Manager is, i need to add new Android virtual device(avd) target for 2.0.1 and 2.1 versions, for that i'm trying to launch Android SDK and AVD Manager. Thank you in advance for your suggestions.

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  • [Iphone] - Problem in saving file using NSCoding

    - by Matte Gary
    Hi everybody, I've a problem with Iphone programming... I've a NSMutableArray containing object of type "MyClass". MyClass has some parameters, like NSNumber and NSString. I've followed the Apple Tutorial about coding and decoding object using NSCoding, but when I try to decode the file I've stored, the NSMutableArray contain object of type "MyClass", but with wrong parameters. I think i've done all I've to do (including protocol, including methods like initwithencode etc), but it's still not working... Any suggestions? Thanks a lot! And sorry for my English XD

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  • How to mask DLL in .NET ?

    - by ytrewq
    Let's say I have a DLL that provides math calculus functions. To use it, I include the using Colhq.Math.Basic; namespace. How could I use it by adding a statement like using Blala.Functions.Math; ? So how could I use everything (methods, enums, etc.) from a DLL by using a different namespace ? Is there a one-shot way to wrap or mask a DLL ?

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  • How to make @BeforeClass run prior Spring TestContext loads up ?

    - by lisak
    Hey, it should be piece of cake for programmers using testNG. I have this scenario @ContextConfiguration(locations={"customer-form-portlet.xml", "classpath:META-INF2/base-spring.xml" }) public class BaseTestCase extends AbstractTestNGSpringContextTests { ... @BeforeClass public void setUpClass() throws Exception { But I'd need the spring context to be load up after @BeforeClass. I I came up with overriding AbstractTestNGSpringContextTests methods : @BeforeClass(alwaysRun = true) protected void springTestContextBeforeTestClass() throws Exception { this.testContextManager.beforeTestClass(); } @BeforeClass(alwaysRun = true, dependsOnMethods = "springTestContextBeforeTestClass") protected void springTestContextPrepareTestInstance() throws Exception { this.testContextManager.prepareTestInstance(this); } and make my method @BeforeClass(alwaysRun = true, dependsOnMethods = "setUpClass") protected void springTestContextPrepareTestClass() throws Exception { } But then I get : Caused by: org.testng.TestNGException: org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextPrepareTestInstance() is not allowed to depend on protected void org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextBeforeTestClass() throws java.lang.Exception Make it public also doesn't help. Could please anybody mention here if it can be done in a working manner :-) I know that I could load the testContext manually, but that wouldn't be so fancy. It works like this, but TestContextManager is not visible so I can't call prepareTestInstance() method on it : @Override @BeforeClass(alwaysRun = true, dependsOnMethods = "setUpClass") public void springTestContextPrepareTestInstance() throws Exception { }

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  • Dns caching for sockets

    - by Poma
    I'm connecting to some websites through socks proxy server. In my case its very good to implement dns cache, so proxy don't need to resolve website's ip address. So, I performed DNS lookup, but don't know where to supply IP address. mySocket.Connect uses proxy's ip address so it isn't right place. I tried to place it in http header GET http://11.22.33.44/index.html HTTP/1.1 - this doesn't work (even in browser) since website is on virtual hosting. It seems that Host header is right place for resolved ip address. Am I right? Will proxy resolve host name (since it's still there in GET header) or not?

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  • How to fit page to Silverlight WebBrowser control?

    - by Igor V Savchenko
    Hello. I use WebBrowser Silverlight 4 control to load some page: <WebBrowser Height="350" Name="webBrowser" Width="400" /> ... webBrowser.Navigate(new Uri("http://mail.live.com")); But page loads with horizontal and vertical scroll bars. So I'm trying to find some ways to get actual size of loaded page (then I can change Height/Width of control) OR change scale of loaded page (to fit it to the actual WebControl control). Is it possible to do with standard WebControl methods?

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  • NHibernate Validator - how to validate enum type

    - by Herr W.
    I'm using nhibernate validator in my current solution. Everythings is almost fine but... My view model has a property of type Gender (see example below) public virtual Gender Gender { get; set; } public enum Gender { Female = 1, Male = 2 } Now i like to have some validation to ensure that the gender property ist set. But neither the NotEmpty nor the NotNull Attribute fulfil the requirement. Is there a kind of a generic solution or best practice to handle enum validations. Thanks in advance.

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  • Building a subquery with ARel in Rails3

    - by Christopher
    I am trying to build this query in ARel: SELECT FLOOR(AVG(num)) FROM ( SELECT COUNT(attendees.id) AS num, meetings.club_id FROM `meetings` INNER JOIN `attendees` ON `attendees`.`meeting_id` = `meetings`.`id` WHERE (`meetings`.club_id = 1) GROUP BY meetings.id) tmp GROUP BY tmp.club_id It returns the average number of attendees per meeting, per club. (a club has many meetings and a meeting has many attendees) So far I have (declared in class Club < ActiveRecord::Base): num_attendees = meetings.select("COUNT(attendees.id) AS num").joins(:attendees).group('meetings.id') Arel::Table.new('tmp', self.class.arel_engine).from(num_attendees).project('FLOOR(AVG(num))').group('tmp.club_id').to_sql but, I am getting the error: undefined method `visit_ActiveRecord_Relation' for #<Arel::Visitors::MySQL:0x9b42180> The documentation for generating non trivial ARel queries is a bit hard to come by. I have been using http://rdoc.info/github/rails/arel/master/frames Am I approaching this incorrectly? Or am I a few methods away from a solution?

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  • XNA 4.0 - What happens when the window is minimized?

    - by Conrad Clark
    Hello. I'm learning F#, and decided to try making simple XNA games for windows using F# (pure enthusiasm) , and got a window with some images showing up. Here's the code: (*Methods*) member self.DrawSprites() = _spriteBatch.Begin() for i = 0 to _list.Length-1 do let spentity = _list.List.ElementAt(i) _spriteBatch.Draw(spentity.ImageTexture,new Rectangle(100,100,(int)spentity.Width,(int)spentity.Height),Color.White) _spriteBatch.End() (*Overriding*) override self.Initialize() = ChangeGraphicsProfile() _graphicsDevice <- _graphics.GraphicsDevice _list.AddSprite(0,"NagatoYuki",992.0,990.0) base.Initialize() override self.LoadContent() = _spriteBatch <- new SpriteBatch(_graphicsDevice) base.LoadContent() override self.Draw(gameTime : GameTime) = base.Draw(gameTime) _graphics.GraphicsDevice.Clear(Color.CornflowerBlue) self.DrawSprites() And the AddSprite Method: member self.AddSprite(ID : int,imageTexture : string , width : float, height : float) = let texture = content.Load<Texture2D>(imageTexture) list <- list @ [new SpriteEntity(ID,list.Length, texture,Vector2.Zero,width,height)] The _list object has a ContentManager, here's the constructor: type SpriteList(_content : ContentManager byref) = let mutable content = _content let mutable list = [] But I can't minimize the window, since when it regains its focus, i get this error: ObjectDisposedException Cannot access a disposed object. Object name: 'GraphicsDevice'. What is happening?

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  • Why is this default template parameter not allowed?

    - by Matt Joiner
    I have the following class: template <typename Type = void> class AlignedMemory { public: AlignedMemory(size_t alignment, size_t size) : memptr_(0) { int iret(posix_memalign((void **)&memptr_, alignment, size)); if (iret) throw system_error("posix_memalign"); } virtual ~AlignedMemory() { free(memptr_); } operator Type *() const { return memptr_; } Type *operator->() const { return memptr_; } //operator Type &() { return *memptr_; } //Type &operator[](size_t index) const; private: Type *memptr_; }; And attempt to instantiate an automatic variable like this: AlignedMemory blah(512, 512); This gives the following error: src/cpfs/entry.cpp:438: error: missing template arguments before ‘buf’ What am I doing wrong? Is void not an allowed default parameter?

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  • Monkeypatch a model in a rake task to use a method provided by a plugin?

    - by gduquesnay.mp
    During some recent refactoring we changed how our user avatars are stored not realizing that once deployed it would affect all the existing users. So now I'm trying to write a rake task to fix this by doing something like this. namespace :fix do desc "Create associated ImageAttachment using data in the Users photo fields" task :user_avatars => :environment do class User # Paperclip has_attached_file :photo ... <paperclip stuff, styles etc> end User.all.each do |user| i = ImageAttachment.new i.photo_url = user.photo.url user.image_attachments << i end end end When I try running that though I'm getting undefined method `has_attached_file' for User:Class I'm able to do this in script/console but it seems like it can't find the paperclip plugin's methods from a rake task.

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