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• Entity Fremework serialization

  - by Alexandr

  Hello guys! I was confused with my problem. I'm using Entity Framework and want to save entities on hard disk and then to restore them. I have no problem with Serializing/Deserializing but i get an exception "The object cannot be added to the ObjectStateManager because it already has an EntityKey. Use ObjectContext.Attach to attach an object that has an existing key" when i try to add deserialized object to my datacontext. And nothing happens when i just Attach my entity to datacontext How to achieve my goal? Thx in advance! -Alexandr-

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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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• vectorized approach to binning with numpy/scipy in Python

  - by user248237

  I am binning a 2d array (x by y) in Python into the bins of its x value (given in "bins"), using np.digitize: elements_to_bins = digitize(vals, bins) where "vals" is a 2d array, i.e.: vals = array([[1, v1], [2, v2], ...]). elements_to_bins just says what bin each element falls into. What I then want to do is get a list whose length is the number of bins in "bins", and each element returns the y-dimension of "vals" that falls into that bin. I do it this way right now: points_by_bins = [] for curr_bin in range(min(elements_to_bins), max(elements_to_bins) + 1): curr_indx = where(elements_to_bins == curr_bin)[0] curr_bin_vals = vals[:, curr_indx] points_by_bins.append(curr_bin_vals) is there a more elegant/simpler way to do this? All I need is a list of of lists of the y-values that fall into each bin. thanks.

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• Google App Engine 1.3.1 <admin-console> Issue

  - by Taylor L

  I attempted to add an <admin-console> section to my appengine-web.xml and I got the exception below. The <admin-console> element is a valid element according to the appengine-web.xsd. It's also documented in the app engine docs. Any ideas as to what is wrong? <admin-console> <page name="My Admin" url="/app/admin" /> </admin-console> Feb 14, 2010 12:40:09 AM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml SEVERE: Received exception processing C:/development/taylor/myapp/target/myapp-web-0.0.1-SNAPSHOT\WEB-INF/appengine-web.xml com.google.apphosting.utils.config.AppEngineConfigException: Unrecognized element <admin-console> at com.google.apphosting.utils.config.AppEngineWebXmlProcessor.processSecondLevelNode(AppEngineWebXmlProcessor.java:99) at com.google.apphosting.utils.config.AppEngineWebXmlProcessor.processXml(AppEngineWebXmlProcessor.java:46) at com.google.apphosting.utils.config.AppEngineWebXmlReader.processXml(AppEngineWebXmlReader.java:94) at com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:61) at com.google.appengine.tools.admin.Application.<init>(Application.java:88) at com.google.appengine.tools.admin.Application.readApplication(Application.java:120) at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:107) at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:58) at com.google.appengine.tools.admin.AppCfg.main(AppCfg.java:54) at net.kindleit.gae.EngineGoalBase.runAppCfg(EngineGoalBase.java:140) at net.kindleit.gae.DeployGoal.execute(DeployGoal.java:38) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:579) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:498) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmentForProject(DefaultLifecycleExecutor.java:265) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:191) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:149) at org.apache.maven.DefaultMaven.execute_aroundBody0(DefaultMaven.java:223) at org.apache.maven.DefaultMaven.execute_aroundBody1$advice(DefaultMaven.java:304) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1) at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody2(MavenEmbedder.java:904) at org.apache.maven.embedder.MavenEmbedder.execute_aroundBody3$advice(MavenEmbedder.java:304) at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:1) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:176) at org.apache.maven.cli.MavenCli.main(MavenCli.java:63) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:408) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:351) at org.codehaus.classworlds.Launcher.main(Launcher.java:31)

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• "Cannot convert to IComparer"

  - by Odrade

  I have the following IComparer defined for boxed RegistryItem objects: public class BoxedRegistryItemComparer : IComparer<object> { public int Compare(object left, object right) { RegistryItem leftReg = (RegistryItem)left; RegistryItem rightReg = (RegistryItem)right; return string.Compare(leftReg.Name, rightReg.Name); } } I want to use this to sort an ArrayList of boxed RegistryItems (It really should be a List<RegistryItem, but that's out of my control). ArrayList regItems = new ArrayList(); // fill up the list ... BoxedRegistryItemComparer comparer = new BoxedRegistryItemComparer(); ArrayList.sort(comparer); However, the last line gives the compiler error: "Cannot convert from BoxedRegistryItemComparer to System.Collections.IComparer". I would appreciate it if someone could point out my mistake.

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• Compilers behave differently with a null parameter of a generic method

  - by Eyal Schneider

  The following code compiles perfectly with Eclipse, but fails to compile with javac: public class HowBizarre { public static <P extends Number, T extends P> void doIt(P value) { } public static void main(String[] args) { doIt(null); } } I simplified the code, so T is not used at all now. Still, I don't see a reason for the error. For some reason javac decides that T stands for Object, and then complains that Object does not conform to the bounds of T (which is true): HowBizarre.java:6: incompatible types; inferred type argument(s) java.lang.Number,java.lang.Object do not conform to bounds of type variable (s) P,T found : <P,T>void required: void doIt(null); ^ Note that if I replace the null parameter with a non-null value, it compiles fine. Which of the compilers behaves correctly and why? Is this a bug of one of them?

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• Nullables? Detecting them

  - by Aren B

  Ok, im still a bit new to using nullable types. I'm writing a reflecting object walker for a project of mine, im getting to the point where im setting the value of a reflected property with the value i've retrieved from a reflected property. The value i've retrieved is still in object form, and it dawned on me, since i want my object walker to return null when it can't find something, (I thought about throwing an exception, but i want this to soft-fail when something's wrong). Anyway, some of the values im setting/getting are decimal bool etc... so it dawned on me that i should just NOT set a non-nullable value, but I realized I straight up don't know how to tell decimal from decimal? Is it enough to key on if the Type of the property im setting is inherited from ValueType?

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• is there any way to group css styles based on their ids?

  - by Brian

  If I have a chunk of css styles that are applied within a certain page element, I would like to group them rather than identify the containing page element for each style. For example, I would like to turn: #bodywrap #leftcolumn p {...} #bodywrap #leftcolumn div {...} #bodywrap #leftcolumn .highlight {...} into something like: #bodywrap #leftcolumn [ p {...} div {...} .highlight {...} ] where everything contained in the brackets respects the containing declarations. Is this possible with css, and what would be the syntax?

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• In C#, can I hide/modify accessors in subclasses?

  - by Diego

  I'm not even sure what this principle is called or how to search for it, so I sincerely apologize if it has been brought up before, but the best way to do it is with an example. class Properties { public string Name { get; set; } } class MyClass { class SubProperties: Properties { public override Name { get { return GetActualName(); } set { _value = SetActualName(value); } } } public SubProperties ClassProperties; private GetActualName() { ClassProperties.Name = "name"; } private SetActualName(string s) { ClassProperties.Name = SomeOtherFunction(s); } } The idea is to have any object that instantiates MyClass have a fully accessible property ClassProperties. To that object, it would look exactly like a Properties object, but behind the scenes, MyClass is actually computing and modifying the results of the fields. This method of declaration is obviously wrong since I can't access GetActualName() and SetActualName() from within the SubProperties definition. How would I achieve something like this?

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• How to set tooltip for buttonbar button

  - by donpal

  I have a buttonbar that has 3 buttons. I'm trying to set a tooltip for each of the buttons, but not sure where. The ButtonBar itself has a skin, which in turn includes a skin for each of the buttons. <s:ButtonBar id="bb" selectedIndex="0" skinClass="skins.bbSkin"> <s:dataProvider> <s:ArrayList> <fx:Object label="item1" /> <fx:Object label="item2" /> <fx:Object label="item3" /> </s:ArrayList> </s:dataProvider> </s:ButtonBar> The skin for the buttonbar is skins.bbSkin The skin inside it for each button is skins.bbbSkin

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• Executing <script> elements inserted with .innerHTML

  - by phidah

  I've got a script that inserts some content into an element using innerHTML. The content could for example be: <script type="text/javascript">alert('test');</script> <strong>test</strong> Problem is that the code inside the <script> tag doesn't get executed. I googled it a bit but there were no apparent solutions. If I inserted the content using jQuery $(element).append(content);the script parts got eval'd before being injected into the DOM. Has anyone got a snippet of code that executes all the <script> elements? The jQuery code was a bit complex so I couldn't really figure out how it was done.

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• how to join a set of XElements to the values of a struct?

  - by jcollum

  Let's say I have a struct that contains local environments: public struct Environments { public const string Dev = "DEV"; public const string Qa1 = "SQA"; public const string Prod1 = "PROD"; public const string Prod2 = "PROD_SA"; public const string Uat = "UAT"; } And I'd like to pull a set of XElements out of an xml doc, but only those elements that have a key that matches a value in a struct. this.environments =(from e in settings.Element("Settings").Element("Environments") .Elements("Environment") .Where( x => x.HasAttribute("name") ) join f in [struct?] on e.Attribute("name") equals [struct value?]).ToDictionary(...) How would I go about doing this? Do I need reflection to get the values of the constants in the struct?

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• Javascript crash / Ajax in IE after 5 times

  - by snarebold

  Hi Please give a look at this site. maimei.ch After 5 times opening a new site via ajax (fancybox) it crashes in IE? One little thing is that i load a whole asp.net site via ajax in the new window. so viewstate and other overhead is there twice after. could this be the problem? if yes, why just after 5 times?. is it possible to call just the content of an specific element via ajax? may be just the innerhtml of the body element of the called site? Thank you and best regards

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• Grails and googleJsonAPIService

  - by Calahad

  I am using the googleJsonAPIService to manipulate users (CRUD). This is how I get the Directory instance: def getBuilder() { def builder def httpTransport = googleJsonAPIService.makeTransport() def jsonFactory = googleJsonAPIService.makeJsonFactory() def requestInitialiser = googleJsonAPIService.getRequestInitialiser() builder = new Directory.Builder(httpTransport, jsonFactory, requestInitialiser); return builder } Directory getGoogleService() { Directory googleService = getBuilder().build() return googleService; } Once I have this service, I use it to get a user's details (in my own service) for example: def query = getGoogleService().users().get(id) return handleException { query.execute() } I manually populate a DTO with the result of that query, and this is where my question comes: Is there an elegant way to have this mapping (object returned to DTO) done automatically so all I have to do is pass the class of the object to be returned? This is the structure of the object returned by google : ["agreedToTerms":true,"changePasswordAtNextLogin":false, "creationTime":"2013-11-04T04:33:35.000Z", "emails":[{"address":"[email protected]","primary":true}],...]

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• webkit multiple inline shadows

  - by meo

  I have trouble setting multiple shadows on one element in webkit: -moz-box-shadow: inset 0 0 3px #999, 0 0 5px #fff; -webkit-box-shadow: inset 0 0 3px #999, 0 0 5px #fff; box-shadow: inset 0 0 3px #999, 0 0 5px #fff; it works fine in firefox but safari displays only the inset shadow. i tried to set both values separately. But safari takes just count of the last value: -webkit-box-shadow: inset 0 0 3px #999; -webkit-box-shadow: 0 5px #fff; is it possible to set more then one shadow on a single element in safari/webkit?

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• Spring.net - how to choose implementation of interface in runtime ?

  - by rouen

  Hi, in all examples of spring.net IoC i can see something like this: interface IClass; class ClassA : IClass; class ClassB : IClass, and then in config.xml file something like [object id="IClass" type="ClassB, Spring.Net.Test" /] but, i really need to do something like this: in config file there will be more implementations if interface: [object id="IClass" type="ClassA, Blah" /] [object id="IClass" type="ClassB, Blah" /] and then, in runtime i choose from them, something like this: IClass c = [get me all implementations of IClass, and choose the one with GetType().FullName == myVariableContainingFullTypeNameOfObjectIWant] how can i do something like this please, i cant google anything for hours.... many thanks !

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• JAX-WS wsgen and collections of collections: wsgen broken?

  - by ayang

  I've been playing around with "bottom-up" JAX-WS and have come across something odd when running wsgen. If I have a service class that does something like: @WebService public class Foo { public ArrayList<Bar> getBarList(String baz) { ... } } then running wsgen gets me a FooService_schema1.xsd that has something like this: <xs:complexType name="getBarListResponse"> <xs:sequence> <xs:element name="return" type="tns:bar" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> which seems reasonable. However, if I want a collection of collections like: public BarCollection getBarCollection(String baz) { ... } // BarCollection is just a container for an ArrayList<Bar> then the generated schema ends up with stuff like: <xs:complexType name="barCollection"> <xs:sequence/> </xs:complexType> <xs:complexType name="getBookCollectionsResponse"> <xs:sequence> <xs:element name="return" type="tns:barCollection" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> An empty sequence is not what I had in mind at all. My original approach was to go with: public ArrayList<ArrayList<Bar>> getBarLists(String baz) { ... } but that ends up with a big chain of complexTypes that just wind up with an empty sequence at the end as well: <xs:complexType name="getBarListsResponse"> <xs:sequence> <xs:element name="return" type="tns:arrayList" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> <xs:complexType name="arrayList"> <xs:complexContent> <xs:extension base="tns:abstractList"> <xs:sequence/> </xs:extension> </xs:complexContent> </xs:complexType> <xs:complexType name="abstractList" abstract="true"> <xs:complexContent> <xs:extension base="tns:abstractCollection"> <xs:sequence/> </xs:extension> </xs:complexContent> </xs:complexType> <xs:complexType name="abstractCollection" abstract="true"> <xs:sequence/> </xs:complexType> Am I missing something or is this a known hole in wsgen? JAXB? Andy

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• Iterating Oracle collections of objects with out exploding them

  - by Scott Bailey

  I'm using Oracle object data types to represent a timespan or period. And I've got to do a bunch of operations that involve working with collections of periods. Iterating over collections in SQL is significantly faster than in PL/SQL. CREATE TYPE PERIOD AS OBJECT ( beginning DATE, ending DATE, ... some member functions...); CREATE TYPE PERIOD_TABLE AS TABLE OF PERIOD; -- sample usage SELECT <<period object>>.contains(period2) FROM TABLE(period_table1) t The problem is that the TABLE() function explodes the objects into scalar values, and I really need the objects instead. I could use the scalar values to recreate the objects but this would incur the overhead of re-instantiating the objects. And the period is designed to be subclassed so there would be additional difficulty trying to figure out what to initialize it as. Is there another way to do this that doesn't destroy my objects?

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• Load vs Get in Nhibernate

  - by Quintin Par

  The master page in my web application does authentication and loads up the user entity using a Get. After this whenever the user object is needed by the usercontrols or any other class I do a Load. Normally nhibernate is supposed to load the object from cache or return the persistent loaded object whenever Load of called. But this is not the behavior shown by my web application. NHprof always shows the sql whenever Load is called. How do I verify the correct behavior of Load? I use the S#arp architecture framework.

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• Equivalent of public static final fields in Scala

  - by JT

  I'm learning Scala, and I can't figure out how to best express this simple Java class in Scala: public class Color { public static final Color BLACK = new Color(0, 0, 0); public static final Color WHITE = new Color(255, 255, 255); public static final Color GREEN = new Color(0, 0, 255); private static final int red; private static final int blue; private static final int green; public Color(int red, int blue, int green) { this.red = red; this.blue = blue; this.green = green; } // getters, et cetera } The best I have is the following: class Color(val red: Int, val blue: Int, val green: Int) object BLACK extends Color(0, 0, 0) object WHITE extends Color(255, 255, 255) object GREEN extends Color(0, 0, 255) But I lose the advantages of having BLACK, WHITE, and GREEN being tied to the Color namespace.

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• AutoCompleteExtender positioning menu incorrectly when scrolled

  - by Colin

  We have an AutoCompleteExtender linked to a TextBox. Both controls are placed inside an UpdatePanel, and the UpdatePanel is displayed as a pop-up dialog using a Javascript library (Ext.BasicDialog). The pop-up is a div on the page, not a separate window. The problem is that when the user scrolls inside the pop-up, the AutoCompleteExtender shows its menu in the wrong place. It looks like it is taking the visible distance from the top of the popup and positioning the menu from the top of the inner html of the popup (which is not visible) We are using Version 1.0.20229.20821 of the AjaxControlToolkit, and we are targetting ASP.NET Framework vewrsion 2.0. I have tried to fix the menu by attaching the following Javascript to the OnClientShown event, but it pretty much does the same thing: function resetPosition(object, args) { var tb = object._element; // tb is the associated textbox. var offset = $('#' + tb.id).offset(); var ex = object._completionListElement; if (ex) { $('#' + ex.id).offset(offset); } }

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• Actionscript 3: How to remove all black pixels from BitmapData ?

  - by Adnan Doric

  Hello, Let say I have a BitmapData with different pixels representing an object, and some black pixels around it that I want to remove. I would like to obtain a new BitmapData, with width and height of the object represented by non-black pixels. For example, let say I have a BitmapData 400x400px, but the object represented by non-black pixels occupies the rect: x=100, y=100, width=200, height=200. I want to get new BitmapData representing that rect, all black pixels should be removed. Any idea on how to do this please ?

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• Spring bean creation via deserialization

  - by mdma

  Spring has many different ways of creating beans, but is it possible to create a bean by deserializing a resource? My application has a number of Components, and each manipulates a certain type of data. During test, the data object is instantiated directly and set directly on the component, e.g. component.setData(someDataObject). At runtime, the data is available as a serialized object and read in from the serialized stream by the component. Rather than having each component explicitly deserialize it's data from the stream, it would be more consistent and flexible to have Spring deserialize the data object from a resource. Is there a DeserializerBeanFactory or something similar?

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• How can I split a Perl string only on the last occurrence of the separator?

  - by kiruthika

  Hi All, my $str="1:2:3:4:5"; my ($a,$b)=split(':',$str,2); In the above code I have used limit as 2 ,so $a will contain 1 and remaining elements will be in $b. Like this I want the last element should be in one variable and the elements prior to the last element should be in another variable. Example $str = "1:2:3:4:5" ; # $a should have "1:2:3:4" and $b should have "5" $str = "2:3:4:5:3:2:5:5:3:2" # $a should have "2:3:4:5:3:2:5:5:3" and $b should have "2"

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• Powershell - Splitting variable into chunks

  - by Andrew

  I have written a query in Powershell interrogating a F5 BIG-IP box through it's iControl API to bring back CPU usage etc. Using this code (see below) I can return the data back into a CSV format which is fine. However the $csvdata variable contains all the data. I need to be able to take this variable and for each line split each column of data into a seperate variable. The output currently looks like this: timestamp,"Utilization" 1276181160,2.3282800000e+00 Any advice would be most welcome $SystemStats = (Get-F5.iControl).SystemStatistics ### Allocate a new Query Object and add the inputs needed $Query = New-Object -TypeName iControl.SystemStatisticsPerformanceStatisticQuery $Query.object_name = $i $Query.start_time = $startTime $Query.end_time = 0 $Query.interval = $interval $Query.maximum_rows = 0 ### Make method call passing in an array of size one with the specified query $ReportData = $SystemStats.get_performance_graph_csv_statistics( (,$Query) ) ### Allocate a new encoder and turn the byte array into a string $ASCII = New-Object -TypeName System.Text.ASCIIEncoding $csvdata = $ASCII.GetString($ReportData[0].statistic_data)

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