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  • Avoid Code Repetition in Condition Statements

    - by Ethosik
    I have been programming for over 15 years now. I consider myself a very good programmer, but I understand (like all of us) there are things that I need to work on. One of these things is code repetition when dealing with conditions. I will give a generic sample: if(condition1) { //perform some logic if(condition2) { //perform some logic if(condition3) { //Perform logic } else { //MethodA(param) } } else { //MethodA(param) } } else { //MethodA() } Now, I cannot make it easy by doing the following: if(condition1 && condition2) { } else { } I cannot do this since I need to perform some logic if condition1 is true and before I test condition2. Is there a way to structure if...else blocks to where if you need to call a method in each else blocks, you are not repeating yourself?

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  • apt-get upgrade E: Sub-process /usr/bin/dpkg returned an error code (1)

    - by user292425
    When I typed apt-get install upgrade, I got error: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? y Setting up linux-netizen (1.0.1-1) ... chrome: no process found dpkg: error processing linux-netizen (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: linux-netizen E: Sub-process /usr/bin/dpkg returned an error code (1) So I tried some method to fix it: sudo apt-get install -f and sudo apt-get install --configure -a But all methods are not working. Please help me....

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  • Code for Controlling the Bike in a bike game

    - by user1489257
    I'm new(ish) to Actionscript 3 and I was wondering what the code what would be like for controlling the bike in a game. I have a two main questions: Is Box2D the best physics engine to go with for this type of game? How would the animation of the bike work. Would I have to create a bike animation of the wheels moving and make it start and stop when the key to go forward is pressed. How would I go about it slowly stopping when the key to go forward is released? Thanks.

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  • How do you deal with monotony of certain tasks? [on hold]

    - by aaronmallen
    I love programming methods, and functions. The if {}, while {}, etc... logic behind them is so much fun. I also love making commits, merging branches, solving merge conflicts. Unfortunately these activities usually require that I create classes which I find tedious and monotonous. The simple action of defining properties, is getting in the way of me writing the logic on what to do with those properties. I can't be alone here there has to be a part of coding for everyone that they dread or at least severely dislike doing compared to other parts of coding. How do you deal with the code based tasks that you find tedious?

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  • Client side code snipets

    - by raghu.yadav
    function clientMethodCall(event) { component = event.getSource(); AdfCustomEvent.queue(component, "customEvent",{payload:component.getSubmittedValue()}, true); event.cancel(); } ]]-- <af:document>      <f:facet name="metaContainer">      <af:group>        <!--[CDATA[            <script>                function clientMethodCall(event) {                                       component = event.getSource();                    AdfCustomEvent.queue(component, "customEvent",{payload:component.getSubmittedValue()}, true);                                                     event.cancel();                                    }                 </script> ]]-->      </af:group>    </f:facet>      <af:form>        <af:panelformlayout>          <f:facet name="footer">          <af:inputtext label="Let me spy on you: Please enter your mail password">            <af:clientlistener method="clientMethodCall" type="keyUp">            <af:serverlistener type="customEvent" method="#{customBean.handleRequest}">          </af:serverlistener>bean code    public void handleRequest(ClientEvent event){                System.out.println("---"+event.getParameters().get("payload"));            } tree<af:tree id="tree1" value="#{bindings.DepartmentsView11.treeModel}" var="node" selectionlistener="#{bindings.DepartmentsView11.treeModel.makeCurrent}" rowselection="single">    <f:facet name="nodeStamp">      <af:outputtext value="#{node}">    </af:outputtext>    <af:clientlistener method="expandNode" type="selection">  </af:clientlistener></f:facet>   <f:facet name="metaContainer">        <af:group>          <!--[CDATA[            <script>                function expandNode(event){                    var _tree = event.getSource();                    rwKeySet = event.getAddedSet();                    var firstRowKey;                    for(rowKey in rwKeySet){                       firstRowKey  = rowKey;                        // we are interested in the first hit, so break out here                        break;                    }                    if (_tree.isPathExpanded(firstRowKey)){                         _tree.setDisclosedRowKey(firstRowKey,false);                    }                    else{                        _tree.setDisclosedRowKey(firstRowKey,true);                    }               }        </script> ]]-->        </af:group>      </f:facet>   </af:tree> </af:clientlistener></af:inputtext></f:facet></af:panelformlayout></af:form></af:document> bean code public void handleRequest(ClientEvent event){ System.out.println("---"+event.getParameters().get("payload")); } tree function expandNode(event){ var _tree = event.getSource(); rwKeySet = event.getAddedSet(); var firstRowKey; for(rowKey in rwKeySet){ firstRowKey = rowKey; // we are interested in the first hit, so break out here break; } if (_tree.isPathExpanded(firstRowKey)){ _tree.setDisclosedRowKey(firstRowKey,false); } else{ _tree.setDisclosedRowKey(firstRowKey,true); } } ]]--

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  • Vectorization of matlab code for faster execution

    - by user3237134
    My code works in the following manner: 1.First, it obtains several images from the training set 2.After loading these images, we find the normalized faces,mean face and perform several calculation. 3.Next, we ask for the name of an image we want to recognize 4.We then project the input image into the eigenspace, and based on the difference from the eigenfaces we make a decision. 5.Depending on eigen weight vector for each input image we make clusters using kmeans command. Source code i tried: clear all close all clc % number of images on your training set. M=1200; %Chosen std and mean. %It can be any number that it is close to the std and mean of most of the images. um=60; ustd=32; %read and show images(bmp); S=[]; %img matrix for i=1:M str=strcat(int2str(i),'.jpg'); %concatenates two strings that form the name of the image eval('img=imread(str);'); [irow icol d]=size(img); % get the number of rows (N1) and columns (N2) temp=reshape(permute(img,[2,1,3]),[irow*icol,d]); %creates a (N1*N2)x1 matrix S=[S temp]; %X is a N1*N2xM matrix after finishing the sequence %this is our S end %Here we change the mean and std of all images. We normalize all images. %This is done to reduce the error due to lighting conditions. for i=1:size(S,2) temp=double(S(:,i)); m=mean(temp); st=std(temp); S(:,i)=(temp-m)*ustd/st+um; end %show normalized images for i=1:M str=strcat(int2str(i),'.jpg'); img=reshape(S(:,i),icol,irow); img=img'; end %mean image; m=mean(S,2); %obtains the mean of each row instead of each column tmimg=uint8(m); %converts to unsigned 8-bit integer. Values range from 0 to 255 img=reshape(tmimg,icol,irow); %takes the N1*N2x1 vector and creates a N2xN1 matrix img=img'; %creates a N1xN2 matrix by transposing the image. % Change image for manipulation dbx=[]; % A matrix for i=1:M temp=double(S(:,i)); dbx=[dbx temp]; end %Covariance matrix C=A'A, L=AA' A=dbx'; L=A*A'; % vv are the eigenvector for L % dd are the eigenvalue for both L=dbx'*dbx and C=dbx*dbx'; [vv dd]=eig(L); % Sort and eliminate those whose eigenvalue is zero v=[]; d=[]; for i=1:size(vv,2) if(dd(i,i)>1e-4) v=[v vv(:,i)]; d=[d dd(i,i)]; end end %sort, will return an ascending sequence [B index]=sort(d); ind=zeros(size(index)); dtemp=zeros(size(index)); vtemp=zeros(size(v)); len=length(index); for i=1:len dtemp(i)=B(len+1-i); ind(i)=len+1-index(i); vtemp(:,ind(i))=v(:,i); end d=dtemp; v=vtemp; %Normalization of eigenvectors for i=1:size(v,2) %access each column kk=v(:,i); temp=sqrt(sum(kk.^2)); v(:,i)=v(:,i)./temp; end %Eigenvectors of C matrix u=[]; for i=1:size(v,2) temp=sqrt(d(i)); u=[u (dbx*v(:,i))./temp]; end %Normalization of eigenvectors for i=1:size(u,2) kk=u(:,i); temp=sqrt(sum(kk.^2)); u(:,i)=u(:,i)./temp; end % show eigenfaces; for i=1:size(u,2) img=reshape(u(:,i),icol,irow); img=img'; img=histeq(img,255); end % Find the weight of each face in the training set. omega = []; for h=1:size(dbx,2) WW=[]; for i=1:size(u,2) t = u(:,i)'; WeightOfImage = dot(t,dbx(:,h)'); WW = [WW; WeightOfImage]; end omega = [omega WW]; end % Acquire new image % Note: the input image must have a bmp or jpg extension. % It should have the same size as the ones in your training set. % It should be placed on your desktop ed_min=[]; srcFiles = dir('G:\newdatabase\*.jpg'); % the folder in which ur images exists for b = 1 : length(srcFiles) filename = strcat('G:\newdatabase\',srcFiles(b).name); Imgdata = imread(filename); InputImage=Imgdata; InImage=reshape(permute((double(InputImage)),[2,1,3]),[irow*icol,1]); temp=InImage; me=mean(temp); st=std(temp); temp=(temp-me)*ustd/st+um; NormImage = temp; Difference = temp-m; p = []; aa=size(u,2); for i = 1:aa pare = dot(NormImage,u(:,i)); p = [p; pare]; end InImWeight = []; for i=1:size(u,2) t = u(:,i)'; WeightOfInputImage = dot(t,Difference'); InImWeight = [InImWeight; WeightOfInputImage]; end noe=numel(InImWeight); % Find Euclidean distance e=[]; for i=1:size(omega,2) q = omega(:,i); DiffWeight = InImWeight-q; mag = norm(DiffWeight); e = [e mag]; end ed_min=[ed_min MinimumValue]; theta=6.0e+03; %disp(e) z(b,:)=InImWeight; end IDX = kmeans(z,5); clustercount=accumarray(IDX, ones(size(IDX))); disp(clustercount); Running time for 50 images:Elapsed time is 103.947573 seconds. QUESTIONS: 1.It is working fine for M=50(i.e Training set contains 50 images) but not for M=1200(i.e Training set contains 1200 images).It is not showing any error.There is no output.I waited for 10 min still there is no output. I think it is going infinite loop.What is the problem?Where i was wrong?

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  • Code Contracts with Interfaces: "Method Invocation skipped. Compiler will generate method invocation

    - by Jörg Battermann
    Good evening, I just started playing with Microsoft.Contracts (latest version) and plugging it on top of a sample interface and right now it looks like this: namespace iRMA2.Core.Interfaces { using System; using System.Collections.Generic; using System.ComponentModel.Composition; using System.Diagnostics.Contracts; /// <summary> /// Base Interface declarations for iRMA2 Extensions /// </summary> [InheritedExport] [ContractClass(typeof(IiRMA2ExtensionContract))] public interface IiRMA2Extension { /// <summary> /// Gets the name. /// </summary> /// <value>The name of the Extension.</value> string Name { get; } /// <summary> /// Gets the description. /// </summary> /// <value>The description.</value> string Description { get; } /// <summary> /// Gets the author of the extension. Please provide complete information to get in touch with author(s) and the corresponding department /// </summary> /// <value>The author of the extensions.</value> string Author { get; } /// <summary> /// Gets the major version. /// </summary> /// <value>The major version of the extension.</value> int MajorVersion { get; } /// <summary> /// Gets the minor version. /// </summary> /// <value>The minor version.</value> int MinorVersion { get; } /// <summary> /// Gets the build number. /// </summary> /// <value>The build number.</value> int BuildNumber { get; } /// <summary> /// Gets the revision. /// </summary> /// <value>The revision.</value> int Revision { get; } /// <summary> /// Gets the depends on. /// </summary> /// <value>The dependencies to other <c>IiRMA2Extension</c> this one has.</value> IList<IiRMA2Extension> DependsOn { get; } } /// <summary> /// Contract class for <c>IiRMA2Extension</c> /// </summary> [ContractClassFor(typeof(IiRMA2Extension))] internal sealed class IiRMA2ExtensionContract : IiRMA2Extension { #region Implementation of IiRMA2Extension /// <summary> /// Gets or sets the name. /// </summary> /// <value>The name of the Extension.</value> public string Name { get { Contract.Ensures(!String.IsNullOrEmpty(Contract.Result<string>())); return default(string); } set { Contract.Requires(value != null); } } /// <summary> /// Gets the description. /// </summary> /// <value>The description.</value> public string Description { get { throw new NotImplementedException(); } } /// <summary> /// Gets the author of the extension. Please provide complete information to get in touch with author(s) and the corresponding department /// </summary> /// <value>The author of the extensions.</value> public string Author { get { throw new NotImplementedException(); } } /// <summary> /// Gets the major version. /// </summary> /// <value>The major version of the extension.</value> public int MajorVersion { get { throw new NotImplementedException(); } } /// <summary> /// Gets the minor version. /// </summary> /// <value>The minor version.</value> public int MinorVersion { get { throw new NotImplementedException(); } } /// <summary> /// Gets the build number. /// </summary> /// <value>The build number.</value> public int BuildNumber { get { throw new NotImplementedException(); } } /// <summary> /// Gets the revision. /// </summary> /// <value>The revision.</value> public int Revision { get { throw new NotImplementedException(); } } /// <summary> /// Gets the Extensions this one depends on. /// </summary> /// <value>The dependencies to other <c>IiRMA2Extension</c> this one has.</value> public IList<IiRMA2Extension> DependsOn { get { Contract.Ensures(Contract.Result<IList<IiRMA2Extension>>() != null); return default(IList<IiRMA2Extension>); } } #endregion } } Now why are the two Contract.Ensures(...) 'blured' out visually with the tooltip saying "Method Invocation skipped. Compiler will generate method invocation because the method is conditional or it is partial method without implementation" and in fact the CodeContracts output does not count/show them... What am I missing & doing wrong here? -J

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  • Example WCF XML-RPC client C# code against custom XML-RPC server implementation?

    - by mr.b
    I have built my own little custom XML-RPC server, and since I'd like to keep things simple, on both server and client side (server side PHP runs, by the way), what I would like to accomplish is to create a simplest possible client in C# using WCF. Let's say that Contract for service exposed via XML-RPC is as follows. [ServiceContract] public interface IContract { [OperationContract(Action="Ping")] string Ping(); // server returns back string "Pong" [OperationContract(Action="Echo")] string Echo(string message); // server echoes back whatever message is } So, there are two example methods, one without any arguments, and another with simple string argument, both returning strings (just for sake of example). Service is exposed via http. What's next? Thanks for reading! P.S. I have done my homework of googling around for samples and similar, but all that I could come up with are some blog-related samples that use existing (and very big) classes, which implement correct IContract (or IBlogger) interfaces, so that most of what I am interested is hidden below several layers of abstraction...

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  • Missing help files for Microsoft.WindowsMobile in Visual Studio 2008 help system

    - by Johann Gerell
    I've just installed the Windows Mobile 6.5.3 DTK, both standard and professional. Before that I had the standard and professional Windows Mobile 6 SDKs. All Windows Mobile help pages are missing in Visual Studio 2008's help system - in particular everything in the Microsoft.WindowsMobile namespace. Microsoft.WindowsMobile.DirectX is there, but it's not part of the Windows Mobile 6 SDK or 6.5.3 DTK. If I open the WM6 docs from the freshly created program group, then it's all fine and dandy, but there doesn't seem to have been a proper integration with VS during installation. Any ideas what's gone wrong and how to fix it?

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  • LaTeX Document eror: too many }'s

    - by Kyle
    Hello, I have a latex document, which works fine but when ever I try to add in an image with a figure caption it gives me an error saying there are to many }'s. \begin{figure}[h!] \caption{A picture of a gull.} \includegraphics[width=0.5\textwidth]{uml-usecase/overview.png} \end{figure} As far as I can see its right, can anyone figure out where I am going wrong? Thanks

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  • Java: JPQL date function to add a time period to another date

    - by bguiz
    SELECT x FROM SomeClass WHERE x.dateAtt BETWEEN CURRENT_DATE AND (CURRENT_DATE + 1 MONTH) In the above JPQL statement, SomeClass has a memebr dateAttr, which is a java.util.Date and has a @Temporal(javax.persistence.TemporalType.DATE) annotation. I need a way to do the (CURRENT_DATE + 1 MONTH) bit - it is obviously wrong in its current state - but cannot find the doc with the date function for JPQL. Can anyone point me in the direction of a doc that documents JPQL date functions (and also how to do this particular query)?

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  • How to browse .rst files ?

    - by Eric
    In many django projects, in the docs directory I can see *.rst files : What is the best way to browse them (without using a text editor of course) ? Is that possible to generate HTML ?

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  • Document generation template engine for production usage NVelocity vs StringTemplate

    - by Chris Marisic
    For building a document generation engine what would be the primary .NET framework to be used in production. The 2 main ones I see are NVelocity and StringTemplate. NVelocity in all forks to be almost unsupported at this point where as ST been active atleast as of this year. Are either or both of these stable for use in production (if nv which fork)? Has anyone had any particularly good success with or failures using either of those frameworks?

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  • C# unit test code questions

    - by 5YrsLaterDBA
    We start use C# build-in unit test functionality. I have VisualStudio 2008 created unit test code for me. I have few question above the generated code. Following are code I copied from the generated file: #region Additional test attributes // //You can use the following additional attributes as you write your tests: // //Use ClassInitialize to run code before running the first test in the class //[ClassInitialize()] //public static void MyClassInitialize(TestContext testContext) //{ //} // //Use ClassCleanup to run code after all tests in a class have run //[ClassCleanup()] //public static void MyClassCleanup() //{ //} // //Use TestInitialize to run code before running each test //[TestInitialize()] //public void MyTestInitialize() //{ //} // //Use TestCleanup to run code after each test has run //[TestCleanup()] //public void MyTestCleanup() //{ //} // #endregion If I need the initialize and cleanup methods, do I need to remove those "My" from the method name when I enable them? //Use ClassInitialize to run code before running the first test in the class //[ClassInitialize()] //public static void MyClassInitialize(TestContext testContext) //{ //} Do I need to call the "MyClassInitialize" method somewhere before running the first test or it will be called automatically before other methods are called. Similar questions for other three methods, are they called automatically at right time frame?

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  • GNU Smalltalk API?

    - by Zachary
    I have recently been learning Smalltalk, mainly by going through the tutorial at gnu.org. While it has been really helpful and I have learned a lot, I would really like an extensive smalltalk API where I could view all of the built in objects and which messages they can receive, and what they will do with those messages. The manual has a list of all of the built in objects, but doesn't really explain anything about them. Some are obvious, like an Array, but I still don't know what all the messages are an Array understands. There is a link to a 'class reference' here, which is generated by Smalltalk, but the link is broken. I was wondering if anyone knows of something like this hosted elsewhere, or could point me towards a similar resource.

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  • How to get statistical distributions out of C++ Code?

    - by Bader
    I want some help in programming a random generator for different types of distribution using C++ language. for the following: Geometric distribution Hypergeometric distribution Weibull distribution Rayleigh distribution Erlang distribution Gamma distribution Poisson distribution Thanks.

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  • How can I change from docbook to restructuredText?

    - by Paul Biggar
    I have a 30-ish page manual in docbook. However, working with docbook is so painful that I don't really update it. I want to switch to restructedText instead. I can't find any direct translator (the best I could find is ezComponents, but it fails on the docbook sgml). Maybe there is an indirect route through RTF or some other format, but I can't figure it out. Any ideas? PS The current conversion process is: docbook -> jade -> html docbook -> jade -> tex -> pdflatex -> pdf

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  • What is the best way to documentate a system metaphor?

    - by SDReyes
    A metaphor help us to communicate with our project stakeholders, using a shared set of concepts and analogies. we develop them all the time, in one way or another. even the XP- programming highly recommend to get it defined since project start. How do you write such thing down in a document (specially if it already exists)? maybe a dictionary-like approach?

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  • What is the best way to document a system metaphor?

    - by SDReyes
    A metaphor help us to communicate with our project stakeholders, using a shared set of concepts and analogies. we develop them all the time, in one way or another. even the XP- programming highly recommend to get it defined since project start. How do you write such thing down in a document (specially if it already exists)? maybe a dictionary-like approach? UPDATE: perhaps a thesaurus would do it better (synonyms sum).

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  • PHPDoc Function Changelog (@change?)

    - by danilo
    What is the best way to document changes in a function with PHPDoc? Something like @change 2010.20.16 user added feature x @change 2010.20.26 user added feature y would be great. But assume there's no @change option... If i add it anyways, what will PHPDoc do with it? Or is there a better / more correct way to document function changes?

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  • Python language API

    - by Oscar Reyes
    Hello. I'm starting with Python coming from java. I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it. I've found very helpul to use help( thing ) from the Python ( command line ) I have found this also: http://docs.python.org/ http://docs.python.org/modindex.html But it seems to help when you already the class name you are looking for. In JavaDoc API I have all the classes so if I need something I scroll down to a class that "sounds like" what I need. Or some times I just browse all the classes to see what they do, and when I need a feature my brain recalls me We saw something similar in the javadoc remember!? But I don't seem to find the similar in Python ( yet ) and that why I'm posting this questin. BTW I know that I would eventually will read this: http://docs.python.org/lib/lib.html But, well, I think it is not today.

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  • OpenMP timer doesn't work on inline assembly code?

    - by Brett
    I'm trying to compare some code samples for speed, and I decided to use the OpenMP timer since I'll eventually be multi threading the code. The timer works great on two of my four code snippets, but not on the other two start=omp_get_wtime(); /*code here*/ finish = omp_get_wtime() - start_time; The four code here sections are serial code, xmmintrin.h code, and two inline assembly codes. The serial and xmminstrin.h code are able to be timed, but the inline assembly codes returns -1.#IND00 for a time. I can't seem to figure out why this is? Thanks for any help or suggestions!

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