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  • Recursive breadth first tree traversal

    - by dugogota
    I'm pulling my hair out trying to figure out how to implement breadth first tree traversal in scheme. I've done it in Java and C++. If I had code, I'd post it but I'm not sure how exactly to begin. Given the tree definition below, how to implement breadth first search using recursion? (define tree1 '( A ( B (C () ()) (D () ()) ) (E (F () ()) (G () ())) )) Any help, any, is greatly appreciated.

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  • Ruby refactoring in VIM

    - by fregas
    Hi, I'm a big fan of Resharper in visual studio. It has some awesome refactoring tools, similar to what you get in Ecplipse for Java. Is there anything like this for Ruby? Better yet, is there a plugin or something into VIM that does refactoring for Ruby code like renaming all instances of a method or variable, renaming classes sitewide, etc? thanks, craig

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  • Android: Dinamically add custom checkboxes to a tableLayout

    - by fxi
    What should i do to use custom checkboxes if i add my checkboxes dinamically on my code? (on the java code not on the xml files). Im following this tutorial http://www.anddev.org/novice-tutorials-f8/tutorial-change-look-of-checkbox-t4553.html, but using it i cant achieve my goal. For example, i have a tableLayout and i want to add a checkbox for each new row i have. Thank you all.

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  • What is a good project structure in C

    - by mohit
    Hi, I have been working in Java/J2ee projects, in which I follow the Maven structure. I want to develop [say a command line interpreter in linux {ubuntu}] in C. I never develop projects in C. I want to know what project structure I should follow.

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  • generating program structur (nodes) using bison and flex

    - by gruszczy
    I would like to write myself a pretty printer for java using bison and flex. I have written a pretty printer for a script language, but I was only writing visitors, which made the printing. How can I turn a program using my formal grammar into a tree of nodes (made using C++ classes), that afterwards I could visit using my visitor? Maybe you could give me some link with an example of this? What i need to put into flex/bison files?

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  • Simulating a 6-faced die in Ada-2005

    - by Arkapravo
    Dear Friends ! I have very definitively come across the 'simulating a 6-faced die' (which produces a random integer between 1 and 6, all outcomes are equally probable) in Java, Python, Ruby and Bash. However, I am yet to see a similar program in Ada. Has anyone come across one ? Kind regards Arkapravo

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  • Good PHP ORM Library?

    - by sgibbons
    Does anyone know of a good object-relational-mapping library for PHP? I know of PDO/ADO, but they seem to only provide abstraction of differences between database vendors not an actual mapping between the domain model and the relational model. I'm looking for a PHP library that functions similarly to the way Hibernate does for Java/.Net.

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  • How to skip parentheses on Netbeans with enter?

    - by nunos
    So I have been programming in C++ with Eclipse and have the habit of hitting enter to skip parentheses (anyone who has ever used eclipse probably knows what I am talking about). I have recently started learning Java and decided to use NetBeans, mostly due to the much more simple interface. However, I would like to know if there a way to skip the (), [], < and "" on enter just like what happens in Eclipse in NetBeans. Thanks.

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  • Am I "wasting" my time learning C and other low level stuff ?

    - by Andreas Grech
    I have just recently started learning C and the reason I did that was because frankly, I consider myself to be of a "less-developer" than the people who know and work with C. Thus I planned to start learning ASM, C, C++ and bought the K&R book and started pushing myself to learn the C Programming Language and up till now I'm doing great...learning about arrays the low level way (ie the pointer + offset thing), pointers and all that and obviously asking questions on stackoverflow for guidance. My problem is that sometimes I get thinking if instead of learning this low level stuff, maybe I should maybe spend more time learning newer, more widely used technologies...basically, more web stuff. Now I am well versed with both C# and ASP.Net and currently that's what I do for a living, but still there exists Microsoft technologies that I haven't quite touched upon...such as ASP.Net MVC, The Entity Framework etc... And those are only Microsoft Technologies...obviously there are other stuff that I would like to touch upon...stuff like Ruby, which would lead me to Ruby on Rails, or Python for Django or even Java and J2EE, or maybe even PHP; ie, basically mainly Web Stuff. Mind you, I did touch upon some of the stuff I mentioned earlier on, such as PHP and Java but I am still not quite versed in them as I am in C# and ASP.Net...but still, I think that by learning other languages that are used in the web environment will broaden my horizons...both as a developer who loves learning, and also Career wise. My point is, am I really using up my time correctly by learning older, lower level stuff? Stuff that for my current line of work, will most probably never use, but still is interesting to know ? To be frankly honest, I am also learning C so that I could, maybe someday, get into Electronics and Micro-controller programming but that is a whole new world for me and, if I choose to go there, will take some time to get adjusted to. And even then, I don't know if I can get a career in working in that line of work. ...but I still wonder about this question over and over...Am I doing the right thing by learning C instead of something (Web-stuff) that will most probably be more useful for me career-wise? I'm sorry for such asking such a long and most probably a boring question, but I feel as if this is the only place where I can ask such a question and get an honest answer from experts in the field. Thank you for your time.

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  • Scripting Languages vs. Compiled Languages for web development

    - by Austin Hyde
    Though I come from a purely PHP background on the web development side of programming, I have also spent much time with C# and C++ on the desktop. I don't really want to spark any flame wars, but: When should you use scripting languages over compiled languages for website development? (and vice versa) Just to clarify, for the sake of this question, I define a "scripting language" to mean an interpreted language like PHP, Python, or Ruby, and a "compiled language" to mean a strongly typed, compiled language like C#, C++, Java, or VB.

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  • Complementary language to learn after Python?

    - by BobDobbs
    As a reasonable proficient Python programmer, I'm wondering what a good second language to learn would be. More specifically, something that does well the things that Python doesn't in general do as well. My first guess would be C/C++ since it's got easy extensibility with Python and because it offers generally better performance, but I'm wondering if Java or C# might be a better or at least equivalently good option with different up/downsides compared to C/C++.

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  • Git Transport Error during push operation?

    - by CitadelCSAlum
    I am using Git Version Control witht he JGit Plugin for the eclipse IDE. when I changed the location of my repo, and when to push to the new repository. I am receiving the following error message. Cant connect to any repository: git+ssh/username@remoteIPAddressgoeshere/srv/wma/git Transport error occured during push operation: Java.IOException: Channel is Broken)

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  • showmodaldialog function in ie8

    - by naweli
    i have written a showmodaldialog() fuction in a jsp file and its working well in firefox but in ie8 its now working,my code is here : <-----a.jsp------ <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"% Step Editor function test() { var retvalue; retvalue = window.showModalDialog("index.jsp"); } <--------- in the above code a.jsp is parent window which is calling index.jsp as child window. <----index.jsp-----

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  • SonarJ like tool for .NET

    - by J. Random Coder
    I'm looking for a tool like SonarJ but for .NET instead of Java. SonarJ helps you to find deviations between he architecture and the code within minutes. It can be integrated into your IDE to help you avoid the introduction of new architetural violations to your code base. You can also use it to maintain metric based software quality rules which will keep complexity under control. I googled and searched SO without satisfying results.

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  • Upload large files via a webpage

    - by Hultner
    What way is the best way to let users upload large files from there webbrowser to a server. I'm talking 200MB+ possible up to a few gigatyes. I have been thinking of a few possible solutions to the problem (not tried them yet) and this is basically the things I came up with. Server download speed will not be a problem but the users connection possibly could. Having some sort of applet on the client side written in Java or Flash which sends the file in parts (is this possible with an applet) to a php/other script on the server and a checksum+ some other info about the file. On the server scripts all the parts and the info file is saved in a temporary directory wich has a unique name based on the checksum of the file and the ip of the user. When the last chunk is sent the applet sends a signal to the server saying it's finished and the server put the file together in the right location. If a chunk doesn't match the checksum for that part the server will send a response to the applet telling it to reupload that chunk. I don't know how important the checksum checking is since it's all tcpackages, someone with more insigth migth be able to answer on that. This is probably the worst way, changing the settings on your server to allow huge fileuploads via an inputfiel. Do it like a normal transfer. User an uploadmanager which does pretty much the same thing as applet i mentioned above. Pros of the first is probably that it would most likely be rather secure, you could show progress as well and possibly resume an upload if ip hasn't changed and do a threaded upload of the chunks. Cons of the first is that the user will need flash/java for it to work. Pros of the 2nd is that it will pretty much work for everyone but cons are big, first there's no way resuming an intruppted download and if something is wrong the whole file would have to be reuploaded is a few of cons. For the third one the pros is pretty muc the same as for the first but the cons is that the user would have to download an application to their computer and run and the application will have to be have to be compatible with their computer and OS. Another way may be a combination of two. Lets say an applet for bigger or more files and a simple input which is rather restricted to maybe max 10-20MB for smaller files and comability. There are probably other much smarter ways to tackle this and that's why I'm asking for advice here on SO.

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  • Javascript Buildmanagement - "Must have" tools?

    - by lajuette
    Are there any must have tools for Java Script (RIA) development like maven, jUnit, Emma, link4j etc. for Javascript? What is the best way to set up a continous integration system for a bigger application or framework? How do projects like jQuery test their code? How to manage dependencies and different project configurations? tools i know so far: javascript-maven-tools (is maven the right choice?) jslint yuicompressor sprockets (found it 5 mins ago) jsunit selenium

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  • What container is eaziest for combining Jpegs and MP3s as video?

    - by Ole Jak
    So I have N (for example 1000) Jpeg frames and 10*N ( for ex 100) seconds of MP3 sound I need some conteiner for Joining them into one Video file (10 frames/second) (beter popular like FLV or AVI or MOV). So what I need is algorithm or code example of combining my data into some popular format. (code example beter be in some language like C# Java or ActionScript or PHP, Algorithm should be theoreticly Implementable with ActionScript or PHP) Can any one, please help me with that?)

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  • Caching the struct Object

    - by PRamod
    How do I create a cache for a struct pointer object in Objective-C? Is there any third party component for caching objects as Java and .NET have? I have the following struct: typedef struct _news { references char *headline; char *story_url; } news; I have a double pointer for the above struct in an interface class. I would like to cache it for some time using Objective-C.

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  • debugging native code (C++) using gdb on android with Eclipse. Is it possible?

    - by noisy
    Hi, I have some piece of code which uses JNI. I can debug code wrote in Java directly in Eclipse (using ADT). I even have a script, which help me debug native code with gdb. However this is not very comfortable way for doing this. Is it possible to configure Eclipse to use gdb (I guess gdbserver) for debbuging android native applications? Do you know where I could find any description of this?

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  • Maven webapp with maven-eclipse-plugin doesn't generates <dependent-module>

    - by chrsk
    I use the eclipse:eclipse goal to generate an Eclipse Project environment. The deployment works fine. The goal creates the var classpath entries for all needed dependencies. With m2eclipse there was the Maven Container which defines an export folder which was WEB-INF/lib for me. But i don't want to rely on m2eclipse so i don't use it anymore. the class path entries which are generated by eclipse:eclipse goal don't have such a export folder. While booting the servlet container with WTP it publishes all resources and classes except the libraries to the context. Whats missing to publish the needed libs, or isn't that possible without m2eclipse integration? Enviroment Eclipse 3.5 JEE Galileo Apache Maven 2.2.1 (r801777; 2009-08-06 21:16:01+0200) Java version: 1.6.0_14 m2eclipse The maven-eclipse-plugin configuration <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.8</version> <configuration> <projectNameTemplate>someproject-[artifactId]</projectNameTemplate> <useProjectReferences>false</useProjectReferences> <downloadSources>false</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpmanifest>true</wtpmanifest> <wtpversion>2.0</wtpversion> <wtpapplicationxml>true</wtpapplicationxml> <wtpContextName>someproject-[artifactId]</wtpContextName> <additionalProjectFacets> <jst.web>2.3</jst.web> </additionalProjectFacets> </configuration> </plugin> The generated files After executing the eclipse:eclipse goal, the dependent-module is not listed in my generated .settings/org.eclipse.wst.common.component, so on server booting i miss the depdencies. This is what i get: <?xml version="1.0" encoding="UTF-8"?> <project-modules id="moduleCoreId" project-version="1.5.0"> <wb-module deploy-name="someproject-core"> <wb-resource deploy-path="/" source-path="src/main/java"/> <wb-resource deploy-path="/" source-path="src/main/webapp"/> <wb-resource deploy-path="/" source-path="src/main/resources"/> </wb-module> </project-modules>

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  • multiple inheritence in OOPS

    - by user145610
    Hi, Im confused about OOPS feature esp about multiple inheritance. Is OOPS allows Multiple Inheritance. Is Multiple Inheritance is a feature of OOPS. If Multiple Inheritance is feature then languages like C#,VB.NET,java etc doesn't support multiple inheritance.But those languages are considered as strongly supported OOPS language. Can anyone address this question

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  • What is the easiest language to start with?

    - by Teifion
    What is the language with the lowest barriers to entry, simplest syntax, easiest setup. I'm aware that there's not a best language but I am sure that there will be one that's got a good score in all three areas. It's for teaching friends how to program, I like PHP and Python but I don't want to be narrow minded and limit myself when there is a better option out there. Common suggestions Ruby Python Basic C Java C# Useful links Best Ways To Teach A Beginner to Program Why's (Poignant) Guide to Ruby Think Python

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  • play framework NoClassDefFoundError

    - by lhk
    I've downloaded the typesafe stack for windows and created a new project. When I fire up sbt and try to run the new unmodified application there's this error: [error] java.lang.NoClassDefFoundError: org/jboss/netty/channel/ChannelFactory just out of curiosity I also tried to compile the project. The error is different: [error] IO error while decoding .....welcome.template.scala with UTF-8 [error] Please try specifying another one using the -encoding option What can I do to fix this ?

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  • Can I make Axis2 generate a WSDL with 'unwrapped' types?

    - by Bedwyr Humphreys
    I'm trying to consume a hello world AXIS2 SOAP web service using a PHP client. The Java class is written in Netbeans and the AXIS2 aar file is generated using the Netbeans AXIS2 plugin. You've all seen it before but here's the java class: public class SOAPHello { public String sayHello(String username) { return "Hello, "+username; } } The wsdl genereated by AXIS2 seems to wrap all the parameters so that when I consume the service i have to use a crazy PHP script like this: $client = new SoapClient("http://myhost:8080/axis2/services/SOAPHello?wsdl"); $parameters["username"] = "Dave"; $response = $client->sayHello($parameters)->return; echo $response."!"; When all I really want to do is echo $client->sayHello("Dave")."!"; My question is two-fold: why is this happening? and what can I do to stop it? :) Here's are the types, message and porttype sections of the generated wsdl: <wsdl:types> <xs:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://soap.axis2.myhost.co.uk"> <xs:element name="sayHello"> <xs:complexType> <xs:sequence> <xs:element minOccurs="0" name="username" nillable="true" type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="sayHelloResponse"> <xs:complexType> <xs:sequence> <xs:element minOccurs="0" name="return" nillable="true" type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> </wsdl:types> <wsdl:message name="sayHelloRequest"> <wsdl:part name="parameters" element="ns:sayHello"/> </wsdl:message> <wsdl:message name="sayHelloResponse"> <wsdl:part name="parameters" element="ns:sayHelloResponse"/> </wsdl:message> <wsdl:portType name="SOAPHelloPortType"> <wsdl:operation name="sayHello"> <wsdl:input message="ns:sayHelloRequest" wsaw:Action="urn:sayHello"/> <wsdl:output message="ns:sayHelloResponse" wsaw:Action="urn:sayHelloResponse"/> </wsdl:operation> </wsdl:portType>

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