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• Ubuntu apt-get install linux-image

  - by Karl Kloppenborg

  I'd like someone to enlighten me as to what exactly goes on with aptitude when I want a kernel. As we all know, there's pretty much the following kernel option: linux-image-generic linux-image-server linux-image-virtual This morning I did an install and it had linux-image-generic on it, so I ran the following: apt-get -y remove linux-image-* This removed all my kernels as expected, I followed suit with running: apt-get install linux-image-virtual Says I've installed linux-image-server!? Am I missing something here, because I checked twice and it did it twice, however if I manually select a kernel (in my instance I used: linux-image-2.6.35-30-virtual) it will install linux-image-virtual. This seems rather strange to me? Details: Running Ubuntu 9.10 Am I missing something? :)

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• BPM ADF Task forms. Checking whether the current user is in a BPM Swimlane

  - by Christopher Karl Chan

  So this blog will focus on BPM Swimlane roles and users from a ADF context.So we have an ADF Task Details Form and we are in the process of making it richer and dynamic in functionality. A common requirement could be to dynamically show different areas based on the user logged into the workspace. Perhaps even we want to know even what swim-lane role the user belongs to.It is is a little bit harder to achieve then one thinks unless you know the trick. [Read More]

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• BPM ADF Task forms. Checking whether the current user is in a BPM Swimlane

  - by Christopher Karl Chan

  @page { margin: 0.79in } P { margin-bottom: 0.08in } --Focus So this blog entry will focus on BPM Swimlane roles and users from a ADF context. So we have an ADF Task Details Form and we are in the process of making it richer and dynamic in functionality. A common requirement could be to dynamically show different areas based on the user logged into the workspace. Perhaps even we want to know even what swim-lane role the user belongs to. It is is a little bit harder to achieve then one thinks unless you know the trick. The Challenge The tricky part here is that the ADF Task Details Form is in fact part of a separate J2EE application to the main workspace. So if you try to use Java or Expression Language to get the logged in user you will only find anonymous and none of the BPM Roles you will be expecting. So what to do? The Magic First add the BC4J Security library to your view project. Then Restart JDeveloper. Now find the web.xml file in the view project of your ADF Task Details Application and look for the JpsFilter section. Then add in the following section. <init-param> <param-name>application.name</param-name> <param-value>OracleBPMProcessRolesApp</param-value></init-param> This will link your application to that of the BPM workspace. Then in your dynamic part of your ADF form you can now check whether the user logged into the BPM Workspace belongs in a BPM swim-lane in any BPM process. The best way to do this is by using expression language in the JSF page itself. Here I am simply changing the rendered flag to either true or false and thereby hiding or showing a section. Perhaps you are re-using the same form for a task in an approver swim-lane and ordinary user swimlane. So we only want the approver to see this field. So call the built in function to check if the user is a member of the BPM swim-lane role. The name of the role must be of the syntax BPMProject.RoleName <af:outputText value="This will only be rendered when the user is part of the BPM Swimlane Role rendered="#{securityContext.userInRole['BPMProjectName.Rolename']}"/> Now you must redeploy your ADF Task Form project Now (in the image above) the text will ONLY get rendered in the Task Details Form only if the user logged into the workspace is a member of the swimlane Unsecure of the BPM project SimpleTask

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• Are outdated comments an urban myth?

  - by Karl Bielefeldt

  I constantly see people making the claim that "comments tend to become outdated." The thing is, I think I have seen maybe two or three outdated comments my entire career. Outdated information in separate documents happens all the time, but in my experience outdated comments in the code itself are exceedingly rare. Have I just been lucky in who I work with? Are certain industries more prone to this problem than others? Do you have specific examples of recent outdated comments you've seen? Or are outdated comments more of a theoretical problem than an actual one?

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• recurring billing / profiles management system

  - by Karl Cassar

  As a company, we have various recurring fees which our clients pay - these can include: hosting plans maintenance agreements SLAs ... I would like to know if anyone knows of a good, web-based recurring billing / payments management system which we could use to help us get more organised regarding this aspect of our business. Basically, we would need to: Create recurring profiles, e.g: Hosting, emails / domain services @ 200eur / year Be able to give free / extend the subscription period, for any reason. Also, we don't have specific products which we would like to choose and charge - all these recurring fees are discussed with the clients, and are created on a per-client basis. I'm not sure if this is the best place to ask for, however since I think most 'webmasters' require such a system to keep track of payment, I thought this would be the place to go for. Thanks in advance!

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• Two internships at the same time -- good or bad?

  - by Karl

  I had no internship a few months ago, so I basically went on a 'resume mailing' spree and emailed a lot of companies that I was interested in working for and that had my line of work. This didn't prove futile until a company accepted me into their internship program but said that I would be working remotely. I had no problem with that, the project was good and I was interested. Now I have another internship at a company that is close to my home and I don't want to miss it at all! I can manage both internships side-by-side. In the day, I will do the internship that is closer to my home and at night (and other times), I can manage the remote internship. My question is -- should I both? I am particularly interested in how two internships at the same time are viewed. Would it look good or bad? PS: Neither is paying me anything, so money is not a factor.

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• Wine: How to open a whole folder, not a single file?

  - by Boris Karl Schlein

  I am using foobar2000 under my Ubuntu with Wine since… I don't know. Now, with the new Ubuntu 12.10 release foobar2000 was not starting anymore correctly so I reinstalled it (foobar2000 1.1.15, wine 1.4). Naturally I have to set up my foobar2000 configuration from scratch but thats not a problem at all. Everything works fine except adding whole folders to the music library using the Add-button under "File-Preferences-Media Library". Problem is one can only open files with the Add-dialog but not a whole folder. Under Windows everything works fine. Editing the foobar2000 configuration file ([foobar2000-folder]/configuration/Core.cfg) by hand does not work… I also tried it with a hex editor. :( So… what can I do? Thanks. :)

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• adverising servers / advert delivery solutions for C#/Asp.Net

  - by Karl Cassar

  We have a website which we want to show adverts in - However, these are custom adverts uploaded by the webmaster, not the Google adverts, or any adverts the network chooses. Ideally, there would be both options. We were considering developing our own advert-management system, but looking at the big picture, it might be better to consider other alternatives. Website is currently developed in C# / ASP.Net (Web Forms) Are there any recommendations to some open-source delivery networks and/or external hosted advert delivery networks? Personally I've used Google's DFP, however sometimes it is not so easy to get a Google AdSense account approved, especially while developing a new website and it not yet being launched. Not sure if this is the best place to ask this kind of question!

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• property rental / availability & booking component for asp.net website [closed]

  - by Karl Cassar

  We have a website which contains various listings of properties. Some of these properties can be rented, and we would like to add a 'booking engine' to it, to manage availability and bookings. However, I don't think it would be feasible to custom-code one for just this website. Is there any component / module which one can integrate with, to provide such functionality? Website is developed in C#/ASP.Net.

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• CS subjects that an undergraduate must know.

  - by Karl

  In college, I was never interested in theory. I never read it. No matter how much I tried, I was unable to read stuff and not know what was actually happening practically. Like for example, in my course on automata theory, my professor told me everything possibly related to the mathematical aspect of it, but not even once did he mention where it would be used practically. This is just an example. I managed to pass my college and interned with a company also, where I did a project and thankfully they didn't bother about my grades, as they were above average. Now, I am interested in knowing what subjects should a CS student must absolutely and positively be aware of? Subjects that can have relevance in the industry. This is because I have some free time on my hands and it would help me better to have a good understanding of them. What are your suggestions? Like for one, algorithms is one subject.

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• Is there a recommended order to take the Oracle Java EE certification exams?

  - by Karl

  I recently passed the Oracle Certified Professional, Java SE 6 Programmer examination. Now, my boss would like me to take "the next step" to broaden my competence. I tried to explain that there is no equivalent Java EE 6 Programmer examination, but a number of different exams, such as Web Services, Web Components, and Enterprise JavaBeans. Is there a recommended path to follow for the various Oracle certifications in the Enterprise Edition of Java? Is it logical to take some exams prior to taking others because the content builds upon previous knowledge or are they all independent?

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• Are there any significant advantages to using a native language for mobile app development?

  - by Karl Daniel

  Forgive me if this question has already been answered but I couldn't quite find the answer I was looking for. What I wanted to know was, is there any significant advantage to using a native language when developing and deploying apps to a mobile environment? The reason I ask is for a long while now I've been using Objective-C, Apple's native language for iOS, to build my apps. However I've been wondering whether or not there is any real benefit to doing this, over using a non-native language like JavaScript and then deploying it through a service like 'Phone Gap'? I do stress 'significant' advantages as native languages are always more likely to have the upper hand when it comes to speed and access to the latest APIs. However in general I don't see using a non-native language or a service like 'Phone Gap' causing and major slow down to my apps or restricting my development. Additionally having the ability to deploy to multiple services is also very handy indeed. This is why I put the question, are there any significant advantages to using a native language for mobile app development?

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• Why use C++ when C works for large projects equally well?

  - by Karl

  Before I start, please DO NOT make this into a C vs C++ flamewar. This question has nothing to do with which language is better or not. Period. I have read that C++ is said to be fit for large projects. After all, it makes managing code easier. OO and other features, for example the STL. But then why use C++ when C works equally well for large projects? Take the example of the Linux kernel. Or GNOME. Or even Windows I guess, it is written in C right? So why bother at all with the complexity of C++ (templates and all that), when C works well and this is not just a statement, but proper examples have been quoted. If it works for projects of magnitude of the kernel, why is C++ preferred or why is C not used for almost all projects?

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• When is using stdio preferable to fstream?

  - by Karl Bielefeldt

  I work on a well-established, embedded C++ code base. We have been using a proprietary API to our filesystem. For better integration with third-party C libraries, we are currently in the process of implementing most of stdio.h and fcntl.h. I made what I thought was a non-controversial proposal that we should also implement the fstream class and encourage new C++ code to use it instead of the new (to our code base) C-style API. We already have the stdout parts of iostream available, although it is not widely used. Given a choice between using stdio and fstream, what are good reasons to choose stdio for embedded software development in C++?

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• Which game - or Gamekit - makes it easy for me to see my own creations in a ready-made world appear?

  - by Karl Heinz

  I saw Slender and "Dream of the Blood Moon". I like to create things with Sculptris and animate them with Kinect. Which game - or Gamekit - makes it easy for me to see my own creations in a ready-made world appear? I would like to start with replacing the characters first for several actions then maybe change the virtual world. Finally I would like to offer the game for free as the others do. Is it a good idea to use c#'s XNA for that?

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• Dynamic Strategy Pattern [migrated]

  - by Karl Barker

  So I'm writing a web service architecture which includes FunctionProvider classes which do the actual processing of requests, and a main Endpoint class which receives and delegates requests to the proper FunctionProvider. I don't know exactly the FunctionProviders available at runtime, so I need to be able to 'register' (if that's the right word) them with my main Endpoint class, and query them to see if they match an incoming request. public class MyFunc implements FunctionProvider{ static { MyEndpoint.register(MyFunc); } public Boolean matchesRequest(Request req){...} public void processRequest(Request req){...} } public class MyEndpoint{ private static ArrayList<FunctionProvider> functions = new ArrayList<FunctionProvider>(); public void register(Class clz){ functions.add(clz); } public void doPost(Request request){ //find the FunctionProvider in functions //matching the request } } I've really not done much reflective Java like this (and the above is likely wrong, but hopefully demonstrates my intentions). What's the nicest way to implement this without getting hacky?

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• Storing a pass-by-reference parameter as a pointer - Bad practice?

  - by Karl Nicoll

  I recently came across the following pattern in an API I've been forced to use: class SomeObject { public: // Constructor. SomeObject(bool copy = false); // Set a value. void SetValue(const ComplexType &value); private: bool m_copy; ComplexType *m_pComplexType; ComplexType m_complexType; }; // ------------------------------------------------------------ SomeObject::SomeObject(bool copy) : m_copy(copy) { } // ------------------------------------------------------------ void SomeObject::SetValue(const ComplexType &value) { if (m_copy) m_complexType.assign(value); else m_pComplexType = const_cast<ComplexType *>(&value); } The background behind this pattern is that it is used to hold data prior to it being encoded and sent to a TCP socket. The copy weirdness is designed to make the class SomeObject efficient by only holding a pointer to the object until it needs to be encoded, but also provide the option to copy values if the lifetime of the SomeObject exceeds the lifetime of a ComplexType. However, consider the following: SomeObject SomeFunction() { ComplexType complexTypeInstance(1); // Create an instance of ComplexType. SomeObject encodeHelper; encodeHelper.SetValue(complexTypeInstance); // Okay. return encodeHelper; // Uh oh! complexTypeInstance has been destroyed, and // now encoding will venture into the realm of undefined // behaviour! } I tripped over this because I used the default constructor, and this resulted in messages being encoded as blank (through a fluke of undefined behaviour). It took an absolute age to pinpoint the cause! Anyway, is this a standard pattern for something like this? Are there any advantages to doing it this way vs overloading the SetValue method to accept a pointer that I'm missing? Thanks!

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• cxf jaxws with spring on gwt 2.0

  - by Karl

  Hi, I'm trying to use an application which uses cxf-jaxws in bean definition: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sec="http://cxf.apache.org/configuration/security" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://cxf.apache.org/configuration/security http://cxf.apache.org/schemas/configuration/security.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd"> however in combination with the jetty from gwt 2.0 development shell my context doesn't load and I get this exception: org.springframework.web.context.ContextLoader: Context initialization failed org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://cxf.apache.org/jaxws] enter code hereOffending resource: class path resource [bean_definition.xml] My project is maven-based and I got cxf-rt-frontend-jaxws which contains the namespacehandler and spring.handlers on the classpath. I added cxf-transports-http-jetty.jar as well. Has anyone experienced this kind of problem and found a solution? It seems to be a classpath issue, added the cxf-rt-frontend-jaxws.jar by hand and it works... Somehow the maven dependency doesn't get added to the classpath. Thanks in advance, karl

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• Outlook 2007 - Cannot start Outlook - Cannot open the Outlook window

  - by Dean Perry

  I went to open Outlook 2007 on my Windows 7 32bit machine and it came up with this error: Cannot start Microsoft Office Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The information store could not be opened. I have deleted and created a new profile in Control Panel Mail but it still doesn't want to work properly but it still comes up with this message. Thanks in advance.

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• extension-base file associations

  - by Maurice Perry

  Hi there, I am using ubuntu 9.10, and I would like to associate thunderbird to all the files with the extension .eml. The problem is that is seems that ubuntu is attributing the mime type text/plain to these files, based on their content, which meens that if I set thunderbird as the default application for .eml files, all the other text files (.txt for instance) will be opened with thunderbird. Is it possible to add a rule to impose a mime type based on the file extension, regardless of its content?

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• windows 7 backup failure insufficiant disk space

  - by Perry

  Windows 7 backup fails and gives me the message that there is insufficient disk space. I have over 2oo gigs of free space on one drive and 900 on the other.

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• Running WordPress and Ghost on Apache with mod_proxy

  - by Jack Perry

  I currently have three WordPress sites hosted on Apache with virtual host files to direct the right domain to the right DocumentRoot. Ghost (node.js) just came out and I've wanted to tinker with it and just play around on one of my spare domains. I'm not really interested in moving over to nginx so I'm trying to get Ghost working on Apache via mod_proxy. I've managed to get Ghost working on my spare domain, but I think there's a problem with my virtual host files, as all of my other domains start pointing to Ghost as well. Here are two virtual host files, one for my main WordPress site that works fine, and the second for Ghost. Domains removed and replaced with DOMAIN and DOMAIN2. DOMAIN <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName DOMAIN.com ServerAlias www.DOMAIN.com DocumentRoot /var/www/DOMAIN.com/public_html <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /var/www/DOMAIN.com/public_html> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> DOMAIN2 <VirtualHost IP:80> ServerAdmin EMAIL ServerName DOMAIN2.com ServerAlias www.DOMAIN2.com ProxyPreserveHost on ProxyPass / http://IP:2368/ </VirtualHost> I get the feeling I'm not working with virtual hosts or mod_proxy right, and Google-fu has let me down after many suggested attempts. Any ideas? Thanks!

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• Browsing not working in Windows 8

  - by Jonathan Perry

  I'm using Windows 8 Professional installed on Windows 7 using the "Save my preferences and apps" installation option. The Windows works great, apps are downloading and I can listen to online radio stations using the TuneIn radio app meaning the internet connection is alive, however, when I open a browser (either Chrome or IE10) and try to browse the internet, I'm getting an "Unable to resolve DNS" error message. Prior to installing the internet browsing worked flawlessly I must say. I'm using ESET NOD32 Antivirus so I suspect that it might interfere with the web connection now, but I'm not so sure. Internet options show that the PC is set to resolve the DNS automatically. I don't know what to do. My other Win7 PCs in my wifi home network are connecting to the internet without any issues. If anyone can help me resolve this I'll be grateful :) Thanks

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• Windows 7 keeps losing drive letters

  - by Dean Perry

  Windows 7 loses its drive letters and I have to keep manually assigning a drive letter everytime I plug in a hard drive, whether it's internal or external. The only way to get around it is to reinstall Windows 7 but the problem will come back after a few months. We are a PC repair company and plug in many drives during the say and it can be very frustrating having to keep assigning a drive letter every time a drive is plugged in. Windows Updates are turned off so it can't be that. Any reason why this would have happened?

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• Where is a list of SharePoint 2010 wiki improvements?

  - by Perry

  Do you know where there is a list of SharePoint 2010 wiki improvements? I'm really hoping they added something equivalent to wikipedia categories -- so that, e.g., we can throw a category marker such as [Category:TODO] into a page, and have it automagically show up on a list of todo items as long as that category is present.

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