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• Webapps don't open correctly when using Chromium

  - by Alex

  I have just installed Ubuntu 12.10 completely fresh, the old version of Ubuntu was discarded or overwritten (or whatever you call it). I want to use the Ubuntu webapps with Chromium but I've had several problems. }The first problem is that Chromium won't ask me if I want to install a webapp if I go to a supported site (and I don't already have the webapp installed). The second problem is that when I install the webapp by visiting the site in Firefox, and then I try to open it in Chromium, Ubuntu will open a completely new Chromium icon and window in the Launcher, and the icon will be labeled "Untitled"; also there is no search bar in the new window, only the tab at the top. I've tried using several webapps with Firefox set as the default browser and they work as expected: once the webapp icon is clicked a Firefox window is opened on the Firefox launcher icon, and the window has 'new tab' button and search bar.

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• Chrome + Touchscreen + Unity (14.04)

  - by Luis Fernando P. Gonzalez

  I've got a Dell 14R with touchscreen with Ubuntu 14.04. When I start Google Chrome by clicking the launcher with the TouchPad or with the Super+ combination, touch support in Chrome doesn't work. When I touch some element, it only gets focus, but doesn't activate the element (button, field, etc). And touch gestures don't work. In the other hand, if I start Chrome by touching the launcher button, touch scroll works in Chrome, even flicking to left does back to the previous page, etc. It doesn't makes sense to me, but is always like this, even across reboots. Anyone can confirm this? Any idea on how to fix?

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• Fixing a NoClassDefFoundError

  - by Chris Okyen

  I have some code: package ftc; import java.util.Scanner; public class Fer_To_Cel { public static void main(String[] argv) { // Scanner object to get the temp in degrees Farenheit Scanner keyboard = new Scanner(System.in); boolean isInt = true; // temporarily put as true in case the user enters a valid int the first time int degreesF = 0; // initialy set to 0 do { try { // Input the temperature text. System.out.print("\nPlease enter a temperature (integer number, no fractional part) in degrees Farenheit: "); degreesF = Integer.parseInt(keyboard.next()); // Get user input and Assign the far. temperature variable, which is casted from String to int. } // Let the user know in a user friendly notice that the value entered wasnt an int ( give int value range ) , and then give error log catch(java.lang.Exception e) { System.out.println("Sorry but you entered a non-int value ( needs to be between ( including ) -2,147,483,648 and 2,147,483,647 ).. \n"); e.printStackTrace(); isInt = false; } } while(!isInt); System.out.println(""); // print a new line. final int degreesC = (5*(degreesF-32)/9); // convert the degrees from F to C and store the resulting expression in degreesC // Print out a newline, then print what X degrees F is in Celcius. System.out.println("\n" + degreesF + " degrees Farenheit is " + degreesC + " degrees Celcius"); } } And The following error: C:\Program Files\Java\jdk1.7.0_06\bin>java Fer_To_Cel Exception in thread "main" java.lang.NoClassDefFoundError: Fer_To_Cel (wrong name: ftc/Fer_To_Cel) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:791) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14 at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:480) The code compiled without compile errors, but presented errors during execution. Which leads me to two questions. I know Errors can be termed Compiler, Runtime and Logic Errors, but the NoClassDefFoundError inherits java.lang.LinkageError. Does that make it a Linker error, being niether of the three types of errors I listed, If I am right this is the answer. For someone else who obtains the singular .java file and compiles it, would this be the only way to solve this problem? Or can I (should I ) do/have done something to fix this problem? Basically, based on a basis of programming, is this a fault of me as the writer? Could this be done once on, my half and be distributed and not needed be done again?

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• How to install Rosegarden Freedom, and Linux Multimedia Studio properly etc.?

  - by antti

  How do I install this Rosegarden Freedom ? I downloaded it but all I got was files and I don't know how to handle them. Where did disappear Linux Multimedia Studio LMMS which I downloaded but it did not appear on the launcher ? Neither cannot I find LMMS with Terminal. Why there's a red drop on the launcher which says Waiting to install and what should I do ? I downloaded Qsynth and it appears when clicking the red drop but still there appears text Waiting to install. Thank You

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• Application starts as Terminal but not as a Desktop entry

  - by Dcm1405

  I just installed SQL Anywhere 12 and can start Sybase Central from the terminal with the command line below without errors: /opt/sqlanywhere12/bin32/scjview However, when I try to start it from a desktop entry I am receiving two error messages that could be something incorrectly defined in the desktop below: #!/usr/bin/env xdg-open [Desktop Entry] Version=1.0 Type=Application Terminal=false Icon[en_US]=gnome-panel-launcher Name[en_US]=Sybase Central Exec=/opt/sqlanywhere12/bin32/scjview Comment[en_US]= Name=Sybase Central Comment= Icon=gnome-panel-launcher Here are the error messages: (unable to post the error images) cannot find libsyblib610_r.so cannot find libulscutil12.so Since the application can be successfully started from a terminal window I was wondering how I could have it setup as a desktop entry as well.

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• Quick path jumping

  - by Sebastian P.

  I was just at a lecture, where I noticed the lecturer using a command (probably aliased) to jump to a specific folder. Example: ~/code$ j sciproj ~/projects/sciproj2011/$ This looked quite slick, so I started wondering: Is this a standard utility, and if so, what is the name? I have two theories as to how it works: It can both create, delete and jump to aliases directly from the command-line in the style of the example, without having to set up aliases in a configuration file or script or whatnot manually. It searches the home directory for a folder matching the name and jumps to it. The second option seems a bit slow, however, so the first would be preferred.

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• Ubuntu 12.10 webapps don't open correctly when using Chromium

  - by Alex

  I have just installed Ubuntu 12.10 completely fresh, the old version of Ubuntu was discarded or overwritten (or whatever you call it). I want to use the Ubuntu webapps with Chromium but I've had several problems. }The first problem is that Chromium won't ask me if I want to install a webapp if I go to a supported site (and I don't already have the webapp installed). The second problem is that when I install the webapp by visiting the site in Firefox, and then I try to open it in Chromium, Ubuntu will open a completely new Chromium icon and window in the Launcher, and the icon will be labeled "Untitled"; also there is no search bar in the new window, only the tab at the top. I've tried using several webapps with Firefox set as the default browser and they work as expected: once the webapp icon is clicked a Firefox window is opened on the Firefox launcher icon, and the window has 'new tab' button and search bar.

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• how to make new window always raise-up?

  - by user211923

  I got an issue of Ubuntu 13.10, the new created window does not always raise-up to the front. It is annoying, which makes me have to click the icons on unity launcher to focus on the new window. Furthermore, if I turn on a program which has already been opened, the system does not bring me to the program, only blinks its icon on the unity launcher. Again, I need to click the icon to get focus on the window. Seems the system does not smart enough to determine which window should be focused to. I'm pretty sure it did not happen in previous versions of Ubuntu. Any idea how to fix it?

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• System bar not showing when using the macbuntu theme

  - by black sensei

  i think i really need your assistance in this.I've installed ubuntu 10.10 and this mac theme and so far it works fine. This morning i upgraded to 11.04 and it also went well. i just realise some of the effects were gone. so i open compizconfig settings manager, i've tried to enable the destop cube and the expo and it prompted me of desabling somethings here and there. honestly i went fast couldn't undo what i've done and i realize the new application launcher and the system bar weren't showing properly, so i decided to restart my machine.After that 'bummer', nothing were like before.no system bar, no application launcher, not menu bar for any of my applications not even for the console. How i'm going to solve this one this time. thanks for reading this and specially for helping out.

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• Real Widget Adds WP7-like Tiles to Android

  - by Jason Fitzpatrick

  Android: If you want the look of Windows Phone 7 tiles on your Android phone without completely replacing your launcher and interface, Real Widget offers the shortcut tiles without the total overhaul. You can customize the widgets to launch apps, system functions, and more to enjoy the WP7 tiled look without sacrificing the functionality of your current Android launcher. Hit up the link below to check out more screenshots and free copy to take for a spin. Real Widget is Android 4.0+ only. Real Widget [via Addictive Tips] HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• Jumping over non-stationary objects without problems ... 2-D platformer ... how could this be solved? [on hold]

  - by help bonafide pigeons

  You know this problem ... take Super Mario Bros. for example. When Mario/Luigi/etc. comes in proximity with a nearing pipe image an invisible boundary setter must prevent him from continuing forward movement. However, when you jump and move both x and y you are coordinately moving in two dimensions at an exact time. When nearing the pipe in mid-air as you are falling, i.e. implementation of gravity in the computer program "pulling" the image back down, and you do not want them to get "stuck" in both falling and moving. That problem is solved, but how about this one: The player controlling the ball object is attempting to jump and move rightwards over the non-stationary block that moves up and down. How could we measure its top and lower x+y components to determine the safest way for the ball to accurately either fall back down, or catch the ledge, or get pushed down under it, etc.?

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• Blank desktop after login

  - by Alex

  Today my 14.04 updated itself not requiring a reboot. After a while I rebooted because of other reasons and then I was pleasantly surprised by a blank screen. I have tried everything I could think about including Reinstalled compiz, unity, ubuntu-desktop, xorg Reinstalled and then removed the nvidia driver So far nothing has worked. Except for one little thing: my cairo-dock is showing. And that's all. I tried with Unity doesn't load, no Launcher, no Dash appears, but none of the answers there helped me. I also tried removing my ~/.Xauthority file and it still doesn't work. Does anybody know what else I could try? UPDATE: sudo dpkg-reconfigure xserver-xorg sudo service lightdm stop sudo service lightdm start When I run that code and then login again the icons on the desktop are displayed but the menu and the launcher are still not there. Also, when I try to run an application from CTRL + ALT + F1 such as dconf reset -f /org/compiz/ it says Cannot autolaunch D-Bus without X11 $DISPLAY I can only run applications with export DISPLAY=:0

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• Finding the try for an except or finally [migrated]

  - by ?s?

  I'm dealing with some code that has fantastically long methods (10k lines!) and some odd use of try-finally and try-except blocks. Some of the latter are long by themselves, and don't always have the try at the start of the method. Obviously I'm trying to refactor the code, but in the meantime just being able to fix a couple of common pathologies would be much easier if I could jump to the start of a block and see what is happening there. When it's 20+ pages away finding it even with the CNPack rainbows is just tedious. I'm using D2010 and have GExperts (with DelForExp), CNPack and DDevExtensions installed, but I can't find anything that lets me jump from the try to the finally or back. Am I missing something? Is there another add-in that I can use that will get me this?

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• Is there any performance difference between Ubuntu Unity and Classic/Fallback?

  - by user48949

  is there any difference between using Ubuntu Unity and Ubunt Classic/Fallback? Just to be clear, I'm not talking about the Launcher or the Dash. Of course Ubuntu Classic/Fallback doesn't have the Launcher/Dash, but this is not the difference I'm talking about. I mean differences related to performance, features, functionalities, compatibilities, etc. These kinds of differences. I'm asking this because I've heard the Fallback Mode is kind of "incomplete" when it's compared to Gnome Shell or Ubuntu Unity, so I just wanted to know whether or not it's true, because if it's true, I don't think using Fallback Mode is worth it.

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• How can I change the folder icon?

  - by Jakob

  I know how to change an icon this way. What I'm looking for is an equivalent to changing the icon for an application in the launcher, i. e. the Home folder, via gedit ~/.local/share/applications/nautilus-home.desktop That way you can set an icon type, which is helpful when you later want to change the icon set resp. theme or when you want the best resolution for each size of the icon. So, I know how I can do this for applications in the launcher - but how can I realize this for icon folders in Nautilus? (In which file these settings are stored and editable whith i. e. Gedit?)

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• How can you remove Unity?

  - by Brad

  In previous versions of Netbook Remix I was able to disable the netbook-launcher and just have a blank desktop. I liked the speed of the Netbook version but not the interface, this worked well for me. However, now with 10.10 and Unity I'm having trouble doing a similar thing. I tried removing netbook-launcher from the startup and tried uninstalling unity. The best result I got was a black desktop with a panel and a non configurable blank white background. Is Unity soo integrated into this version that I will have to just go with the default ubuntu installation?? In the past the default version has been slower then the Netbook version without the interface. Thanks.

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• cursor jumps when moving (and some other times)

  - by nyne

  i updated to 12.10 beta 1 when it was released (coming from 12.04 fresh install, i skipped the alpha releases of 12.10) since then i've done all the usual updates but ive had an issue with my cursor jumping. it does not jump when typing, i've done a lot of searching and cant find an answer, it tends to happen most when i move the cursor the jump is maybe 15-20 pixels down and to the right it seems like a display issue because if i hover over a link or the x to close a window the cursor will settle in it's down/right position, but the whatever im hovering over will still act as if that's where the mouse is, and clicking still works on the item. so the mouse is actually in its original location, but it's displaying offset and flickering back and forth from its down/right position and its correct position this makes use very difficult because the mouse is never displayed where it actually is and i have to estimate my clicks any ideas?

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• Make the player run onto stairs smoothly

  - by misiMe

  I have a 2D Platform game, where the player Always runs to the right, but the terrain isn't Always horizontal. Example: I implemented a bounding-box collision system that just checks for intersections with player box and the other blocks, to stop player from running if you encounter a big block, so that you have to jump, but when I put stairs, I want him to run smoothly just like he is on the horizontal ground. With the collision system you have to jump the stairs in order to pass them! I thought about generating a line between the edges of the stairs, and imposing the player movement on that line... What do you think? Is there something more clever to do?

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• MVC Html.ActionLink not passing querystring properly

  - by Dave Hanna

  This seems like it should be pretty straight forward, but I'm apparently confused. I have a List view that displays a paged list. At the bottom I have a set of actionlinks: <%= Html.ActionLink("First Page", "List", new { page = 1} ) %> &nbsp; <%= Html.ActionLink("Prev Page", "List", new { page = Model.PageNumber - 1 }) %> &nbsp; <%= Html.ActionLink("Next Page", "List", new { page = Model.PageNumber + 1 }) %> &nbsp; <%= Html.ActionLink("Last Page", "List", new { page = Model.LastPage } )%> I'm using the basic default routes setup, except with "List" substituted for "Index": routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "List", id = UrlParameter.Optional } // Parameter defaults ); The problem is that the ActionLink helpers are generating links of the form: http://localhost:2083/Retrofit?page=2 rather than http://localhost:2083/Retrofit/?page=2 (with the trailing slash after the controller name & before the query string). When the first URL is routed, it completely loses the query string - if I look at Request.QueryString by the time it gets to the controller, it's null. If I enter the second URL (with the trailing slash), it comes in properly (i.e., QueryString of "page=2"). So how can I either get the ActionLink helper to generate the right URL, or get the Routing to properly parse what ActionLink is generating? Thanks.

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• Configuring ant to run unit tests. Where should libraries be? How should classpath be configured? av

  - by chillitom

  Hi All, I'm trying to run my junit tests using ant. The tests are kicked off using a JUnit 4 test suite. If I run this direct from Eclipse the tests complete without error. However if I run it from ant then many of the tests fail with this error repeated over and over until the junit task crashes. [junit] java.util.zip.ZipException: error in opening zip file [junit] at java.util.zip.ZipFile.open(Native Method) [junit] at java.util.zip.ZipFile.(ZipFile.java:114) [junit] at java.util.zip.ZipFile.(ZipFile.java:131) [junit] at org.apache.tools.ant.AntClassLoader.getResourceURL(AntClassLoader.java:1028) [junit] at org.apache.tools.ant.AntClassLoader$ResourceEnumeration.findNextResource(AntClassLoader.java:147) [junit] at org.apache.tools.ant.AntClassLoader$ResourceEnumeration.nextElement(AntClassLoader.java:130) [junit] at org.apache.tools.ant.util.CollectionUtils$CompoundEnumeration.nextElement(CollectionUtils.java:198) [junit] at sun.misc.CompoundEnumeration.nextElement(CompoundEnumeration.java:43) [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.checkForkedPath(JUnitTask.java:1128) [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeAsForked(JUnitTask.java:1013) [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:834) [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeOrQueue(JUnitTask.java:1785) [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:785) [junit] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) [junit] at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) [junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [junit] at java.lang.reflect.Method.invoke(Method.java:597) [junit] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [junit] at org.apache.tools.ant.Task.perform(Task.java:348) [junit] at org.apache.tools.ant.Target.execute(Target.java:357) [junit] at org.apache.tools.ant.Target.performTasks(Target.java:385) [junit] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337) [junit] at org.apache.tools.ant.Project.executeTarget(Project.java:1306) [junit] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) [junit] at org.apache.tools.ant.Project.executeTargets(Project.java:1189) [junit] at org.apache.tools.ant.Main.runBuild(Main.java:758) [junit] at org.apache.tools.ant.Main.startAnt(Main.java:217) [junit] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257) [junit] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104) my test running task is as follows: <target name="run-junit-tests" depends="compile-tests,clean-results"> <mkdir dir="${test.results.dir}"/> <junit failureproperty="tests.failed" fork="true" showoutput="yes" includeantruntime="false"> <classpath refid="test.run.path" /> <formatter type="xml" /> <test name="project.AllTests" todir="${basedir}/test-results" /> </junit> <fail if="tests.failed" message="Unit tests failed"/> </target> I've verified that the classpath contains the following as well as all of the program code and libraries: ant-junit.jar ant-launcher.jar ant.jar easymock.jar easymockclassextension.jar junit-4.4.jar I've tried debugging to find out which ZipFile it is trying to open with no luck, I've tried toggling includeantruntime and fork and i've tried running ant with ant -lib test/libs where test/libs contains the ant and junit libraries. Any info about what causes this exception or how you've configured ant to successfully run unit tests is gratefully received. ant 1.7.1 (ubuntu), java 1.6.0_10, junit 4.4 Thanks. Update - Fixed Found my problem. I had included my classes directory in my path using a fileset as opposed to a pathelement this was causing .class files to be opened as ZipFiles which of course threw an exception.

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• search all paths and the shortest path for a graph - Prolog

  - by prologian

  Hi , I have a problem in my code with turbo prolog wich search all paths and the shortest path for a graph between 2 nodes the problem that i have is to test if the node is on the list or not exactly in the clause of member and this is my code : /* 1 ---- b ---- 3 --- | --- --- | ----- a |5 d --- | ----- --- | --- 2 --- | --- 4 -- c -- for example we have for b--->c ([b,c],5) , ([b,a,c],3) and ([b,d,c],7) : possible paths. ([b,a,c],3) : the shortest path. */ DOMAINS list=Symbol * PREDICATES distance(Symbol,Symbol) path1(Symbol,Symbol,list,integer) path(Symbol,Symbol,list,list,integer) distance(Symbol,list,integer) member(Symbol,list) shortest(Symbol,Symbol,list,integer) CLAUSES distance(a,b,1). distance(a,c,2). distance(b,d,3). distance(c,d,4). distance(b,c,5). distance(b,a,1). distance(c,a,2). distance(d,b,3). distance(d,c,4). distance(c,b,5). member(X, [Y|T]) :- X = Y; member(X, T). absent(X,L) :-member(X, L),!,fail. absent(_,_). /*find all paths*/ path1(X, Y, L, C):- path(X, Y, L, I, C). path(X, X, [X], I, C) :- absent(X, I). path(X, Y, [X|R], I, C) :- distance(X, Z, A) , absent(Z, I), path(Z, Y, R, [X|I] ,C1) , C=C1+A . /*to find the shortest path*/ shortest(X, Y, L, C):-path(X, Y, L, C),path(X, Y, L1, C1),C<C1.

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• Force-directed graphing

  - by David

  Hello, I'm trying to write a force-directed or force-atlas code base for a graphing application I'm building for myself. Here is an example of what I'm attempting: http://sawamuland.com/flash/graph.html I managed to find some pseudo code to accomplish what I'd like on the Wiki Force-atlas article. I've converted this into ActionScript 3.0 code since it's a Flash application. Here is my source: var timestep:int = 0; var damping:int = 0; var total_kinetic_engery:int = 0; for (var node in list) { var net_force:int = 0; for (var other_node in list) { net_force += coulombRepulsion(node, other_node, nodeList); } for (var spring in list[node].relations) { net_force += hookeAttraction(node, spring, nodeList); } list[node].velocity += (timestep * net_force) * damping; list[node].position += timestep * list[node].velocity; total_kinetic_engery += list[node].mass * (list[node].velocity) ^ 2; } The problem now is finding pseudo code or a function to perform the the coulomb repulsion and hooke attraction code. I'm not exactly sure how to accomplish this. Does anyone know of a good reference I can look at...understand and implement quickly? Best.

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• XML deserialization doubling up on entities

  - by Nathan Loding

  I have an XML file that I am attempting to deserialize into it's respective objects. It works great on most of these objects, except for one item that is being doubled up on. Here's the relevant portion of the XML: <Clients> <Client Name="My Company" SiteID="1" GUID="xxx-xxx-xxx-xxx"> <Reports> <Report Name="First Report" Path="/Custom/FirstReport"> <Generate>true</Generate> </Report> </Reports> </Client> </Clients> "Clients" is a List<Client> object. Each Client object has a List<Report> object within it. The issue is that when this XML is deserialized, the List<Report> object has a count of 2 -- the "First Report" Report object is in there twice. Why? Here's the C#: public class Client { [System.Xml.Serialization.XmlArray("Reports"), System.Xml.Serialization.XmlArrayItem(typeof(Report))] public List<Report> Reports; } public class Report { [System.Xml.Serialization.XmlAttribute("Name")] public string Name; public bool Generate; [System.Xml.Serialization.XmlAttribute("Path")] public string Path; } class Program { static void Main(string[] args) { List<Client> _clients = new List<Client>(); string xmlFile = "myxmlfile.xml"; System.Xml.Serialization.XmlSerializer xmlSerializer = new System.Xml.Serialization.XmlSerializer(typeof(List<Client>), new System.Xml.Serialization.XmlRootAttribute("Clients")); using (FileStream stream = new FileStream(xmlFile, FileMode.Open)) { _clients = xmlSerializer.Deserialize(stream) as List<Client>; } foreach(Client _client in _clients) { Console.WriteLine("Count: " + _client.Reports.Count); // This write "2" foreach(Report _report in _client.Reports) { Console.WriteLine("Name: " + _report.Name); // Writes "First Report" twice } } } }

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• How to provide stl like container with public const iterator and private non-const iterator?

  - by WilliamKF

  Hello, I am deriving a class privately from std::list and wish to provide public begin() and end() for const_iterator and private begin() and end() for just plain iterator. However, the compiler is seeing the private version and complaining that it is private instead of using the public const version. I understand that C++ will not overload on return type (in this case const_iterator and iterator) and thus it is choosing the non-const version since my object is not const. Short of casting my object to const before calling begin() or not overloading the name begin is there a way to accomplish this? I would think this is a known pattern that folks have solved before and would like to follow suit as to how this is typically solved. class myObject; class myContainer : private std::list<myObject> { public: typedef std::list<myObject>::const_iterator myContainer::const_iterator; private: typedef std::list<myObject>::iterator myContainer::iterator; public: myContainer::const_iterator begin() const { return std::list<myObject>::begin(); } myContainer::const_iterator end() const { return std::list<myObject>::end(); } private: myContainer::iterator begin() { return std::list<myObject>::begin(); } myContainer::iterator end() { return std::list<myObject>::end(); } }; void myFunction(myContainer &container) { myContainer::const_iterator aItr = container.begin(); myContainer::const_iterator aEndItr = container.end(); for (; aItr != aEndItr; ++aItr) { const myObject &item = *aItr; // Do something const on container's contents. } } The error from the compiler is something like this: ../../src/example.h:447: error: `std::_List_iterator<myObject> myContainer::begin()' is private caller.cpp:2393: error: within this context ../../src/example.h:450: error: `std::_List_iterator<myObject> myContainer::end()' is private caller.cpp:2394: error: within this context Thanks. -William

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• EJB3 Entity and Lazy Problem

  - by Stefano

  My Entity beAN have 2 list: @Entity @Table(name = "TABLE_INTERNAL") public class Internal implements java.io.Serializable { ...SOME GETTERS AND SETTERS... private List<Match> matchs; private List<Regional> regionals; } mapped one FetchType.LAZY and one FetchType.EAGER : @OneToMany(fetch = FetchType.LAZY,mappedBy = "internal") public List<Match> getMatchs() { return matchs; } public void setMatchs(List<Match> matchs) { this.matchs = matchs; } @ManyToMany(targetEntity = Regional.class, mappedBy = "internals", fetch =FetchType.EAGER) public List<Regional> getRegionals() { return regionals; } public void setRegionals(List<Regional> regionals) { this.regionals = regionals; } I need both lists full ! But I cant put two FetchType.EAGER beacuse it's an error. I try some test: List<Internal> out; out= em.createQuery("from Internal").getResultList(); out= em.createQuery("from Internal i JOIN FETCH i.regionals ").getResultList(); I'm not able to fill both lists...Help!!! Stefano

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