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  • Writing or extending existing emacs packages: is it worth or should I move to Netbeans/Eclipse?

    - by Andrea
    I'm finishing my master degree course in CS and I've almost become addicted to Emacs. I've used it to write in C, Latex, Java, JSP,XML, CommonLisp, Ada and other languages no other editor supported, like AMPL. I'd like to improve the packages I've been using the most or create new ones, but, in practice, I find that the implementation of Emacs leaves a lot to be desired. There are a lot of poorly-featured/poorly-maintained packages with either overlapping functionalities or obscure incompatibilities, and Elisp just seems to foster the situation by lacking the common features modern lisps have. In contrast Eclipse and Netbeans are actively improved and it does seem they can be effective for non-mainstream languages. I tried Hibachi for Ada in Eclipse and it worked well, there's CUPS for Lisp in Eclipse and LambdaBeans built using NetBeans components. On the other hand those plugins seem to be less active than their Emacs' counterparts, for example Hibachi was archived last year. What's your opinion on this? Which editor should I write extension for? EDIT: To answer Larry Coleman (see comment below): I like Emacs as a user because it is efficient both for me and the computer I'm using. It's fast and the textual interface (i.e. minibuffer) allows for quick interaction. It's solid and packages are usually small and easy to manage. If I need to correct or remove something I usually just have to change a row in my .emacs or an elisp file, or delete a directory. Eclipse plugins rely on a more complicated process that screwed my Eclipse configuration a couple of times, forcing me to do a clean reinstall. Emacs works as long as I use the basic packages. If I need something more complicated the situation gets pretty hairy. As a "power user" I think that the best I can hope for is to write a severely crippled version of the extensions I'd actually like to have; in other words, that it's not worth the trouble. I'd like to write extensions for the things I'd like to have automated in Emacs, for example project support with automated tag-table update on file writing. There are a few projects on this that lack integration, documentation, extensibility and so forth. The best one is probably CEDET, for which I believe the Greenspun's 10th rule can be applied. EDIT: To comment Larry Coleman's answer I'm pretty sure I can pick elisp programming but the extensions I have in mind don't exist yet despite their relative simplicity and the effort more knowledgeable people poured into related projects.This makes me wonder whether it is so because of the way emacs is developed, i.e. people tend to write their own little extensions without coordination, or its implementation, its extension language not being able to keep up with the growing complexity.

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  • Best method to do A B testing across to subdomains

    - by Lior
    I want to do an A B test of an entire site for a new design and UX with only slight changes in content (a big brand site that has good Google rankings for many generic keywords. My idea of implementation is doing a 302 redirect to the new version (placing it on www1 subdomain) and allowing only user agents of known browsers to pass. The test version will have disallow all in the robots text. Will Google treat this favorably or do I have to use Google Website Optimizer (which will give me tracking headaches)?

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  • Why enumerator structs are a really bad idea (redux)

    - by Simon Cooper
    My previous blog post went into some detail as to why calling MoveNext on a BCL generic collection enumerator didn't quite do what you thought it would. This post covers the Reset method. To recap, here's the simple wrapper around a linked list enumerator struct from my previous post (minus the readonly on the enumerator variable): sealed class EnumeratorWrapper : IEnumerator<int> { private LinkedList<int>.Enumerator m_Enumerator; public EnumeratorWrapper(LinkedList<int> linkedList) { m_Enumerator = linkedList.GetEnumerator(); } public int Current { get { return m_Enumerator.Current; } } object System.Collections.IEnumerator.Current { get { return Current; } } public bool MoveNext() { return m_Enumerator.MoveNext(); } public void Reset() { ((System.Collections.IEnumerator)m_Enumerator).Reset(); } public void Dispose() { m_Enumerator.Dispose(); } } If you have a look at the Reset method, you'll notice I'm having to cast to IEnumerator to be able to call Reset on m_Enumerator. This is because the implementation of LinkedList<int>.Enumerator.Reset, and indeed of all the other Reset methods on the BCL generic collection enumerators, is an explicit interface implementation. However, IEnumerator is a reference type. LinkedList<int>.Enumerator is a value type. That means, in order to call the reset method at all, the enumerator has to be boxed. And the IL confirms this: .method public hidebysig newslot virtual final instance void Reset() cil managed { .maxstack 8 L_0000: nop L_0001: ldarg.0 L_0002: ldfld valuetype [System]System.Collections.Generic.LinkedList`1/Enumerator<int32> EnumeratorWrapper::m_Enumerator L_0007: box [System]System.Collections.Generic.LinkedList`1/Enumerator<int32> L_000c: callvirt instance void [mscorlib]System.Collections.IEnumerator::Reset() L_0011: nop L_0012: ret } On line 0007, we're doing a box operation, which copies the enumerator to a reference object on the heap, then on line 000c calling Reset on this boxed object. So m_Enumerator in the wrapper class is not modified by the call the Reset. And this is the only way to call the Reset method on this variable (without using reflection). Therefore, the only way that the collection enumerator struct can be used safely is to store them as a boxed IEnumerator<T>, and not use them as value types at all.

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  • Data searches that leverage existing indexes

    Recent installments of our SQL Server 2005 Express Edition series have been discussing its implementation of Full Text Indexing. This article focuses on data searches, which leverage existing indexes, taking into account such features as noise words and thesaurus files.

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  • Using NBuilder to mock up a data driven UI - Part 2

    In this article we will continue our discussion by filling out the implementation in our service class with some NBuilder code. Once we have the working service class in place we can then create a working UI (in the ASP.NET MVC project we created in the last article).

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  • Java: How to manage UDP client-server state

    - by user92947
    I am trying to write a Java application that works similar to MapReduce. There is a server and several workers. Workers may come and go as they please and the membership to the group has a soft-state. To become a part of the group, the worker must send a UDP datagram to the server, but to continue to be part of the group, the worker must send the UDP datagram to the server every 5 minutes. In order to accommodate temporary errors, a worker is allowed to miss as many as two consecutive periodic UDP datagrams. So, the server must keep track of the current set of workers as well as the last time each worker had sent a UDP datagram. I've implemented a class called WorkerListener that implements Runnable and listens to UDP datagrams on a particular UDP port. Now, to keep track of active workers, this class may maintain a HashSet (or HashMap). When a datagram is received, the server may query the HashSet to check if it is a new member. If so, it can add the new worker to the group by adding an entry into the HashSet. If not, it must reset a "timer" for the worker, noting that it has just heard from the corresponding worker. I'm using the word timer in a generic sense. It doesn't have to be a clock of sorts. Perhaps this could also be implemented using int or long variables. Also, the server must run a thread that continuously monitors the timers for the workers to see that a client that times out on two consecutive datagram intervals, it is removed from the HashSet. I don't want to do this in the WorkerListener thread because it would be blocking on the UDP datagram receive() function. If I create a separate thread to monitor the worker HashSet, it would need to be a different class, perhaps WorkerRegistrar. I must share the HashSet with that thread. Mutual exclusion must also be implemented, then. My question is, what is the best way to do this? Pointers to some sample implementation would be great. I want to use the barebones JDK implementation, and not some fancy state maintenance API that takes care of everything, because I want this to be a useful demonstration for a class that I am teaching. Thanks

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  • computer:// in gksudo nautilus

    - by MetaChrome
    I am curious what computer:// is, in terms its implementation on the file system/in the nautilus executable/as a configuration provided to nautilus? Perhaps it is a configurable group (of paths) for nautilus, configurable on a user basis. The reason I ask is because it is not accessible with root's nautilus. If #1 is correct, how does one create computer:// and/or how does one create such path groups?

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  • Oracle University Aggiornamento sull'enablement dei partner (Week 13)

    - by swalker
    Get ready for Fusion Applications Implementations Oracle University has scheduled the first Fusion Applications Implementation courses in Italy. If you can’t find an In Class event for the course you need, why don’t you try a Live Virtual Class? Check out the Location: Online. All courses can be booked via the websites. For more information, assistance in booking and scheduling requests contact your local Oracle University Service Desk. Rimanete in contatto con Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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  • Load Balance and Parallel Performance

    Load balancing an application workload among threads is critical to performance. However, achieving perfect load balance is non-trivial, and it depends on the parallelism within the application, workload, the number of threads, load balancing policy, and the threading implementation.

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  • EJIE usage of Oracle WebLogic Server and Oracle Coherence

    - by rob.misek
    Watch Mike Lehmann, Senior Director of Product Management from Oracle and Oscar Guadilla, Senior Architect from EJIE, Basque Government's IT Company, discuss EJIE's implementation of Oracle WebLogic Server and Oracle Coherence. Hear EJIE's history with Oracle WebLogic Server, how and why they are using it for its web application platform, common services, file services, and intranet and the benefits they are gleaning. In addition, hear how EJIE is using WebLogic JMS for document management common service integration in its Eco-government project. Watch from the beginning or jump to the details of their Coherence usage (10:15)

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  • Oracle University Partner Enablement-Update (Week 13)

    - by swalker
    Get ready for Fusion Applications Implementations Oracle University has scheduled the first implementation courses. To view see: Italy France The Netherlands: UK If you can’t travel to these countries, why don’t you try a Live Virtual Class? All courses can be booked via the websites. For more information, assistance in booking and scheduling requests contact your local Oracle University Service Desk. Bleiben Sie in Verbindung mit Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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  • Amtrak's Mobile-SOA Oracle SOA Solution at OpenWorld

    - by Bruce Tierney
    During yesterday's Mobile SOA Session, Innowave presented their ticketing solution implemented for Amtrak which uses Oracle SOA Suite for service-enablement with support for Microsoft Windows Mobile handheld devices.  Innowave's Hilal Khan described this chart and highlighted the value of a service-based approach since the data went to handhelds as well as to APEX reports with a single service implementation:

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  • Proper way to implement Android XML onClick attribute in Activity

    - by Austyn Mahoney
    I have used the android:onClick attribute extensively in my XML layouts for my Android application. Example: <Button android:id="@+id/exampleButton" android:onClick="onButtonClick" /> Is it proper to create an Interface to enforce the implementation of those onClick methods in Activities that use that layout file? public interface MyButtonInterface { public onButtonClick(View v); }

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  • Integrating Global Knowledge Software and the Future of UPK

    With the acquisition of Global Knowledge Software, SAP and Oracle customers are wondering about the future of Oracle User Productivity Kit (UPK). Tune into this conversation with Sonny Singh, Senior Vice President, Product and Industries Business Unit to learn why Oracle purchased Global Knowledge Software, how an SAP solution fits into an Oracle strategy, and what that means for the future of UPK – the end user training and implementation solution for accelerating user adoption, ensuring the success of enterprise applications, and making organizations productive from day one!

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  • Looking at EMEA and Telecommunications

    - by Brian Dayton
    With Summer holidays starting up we've been spending a lot of time speaking with our counterparts in EMEA. Often we talk about recent customer successes. One of my recent discoveries is this great video covering BT's move towards SOA and how this initiative not only accelerated order delivery time from 6 days to 6 minutes but created new revenue streams and reduced time to implementation.

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  • Should I return iterators or more sophisticated objects?

    - by Erik
    Say I have a function that creates a list of objects. If I want to return an iterator, I'll have to return iter(a_list). Should I do this, or just return the list as it is? My motivation for returning an iterator is that this would keep the interface smaller -- what kind of container I create to collect the objects is essentially an implementation detail On the other hand, it would be wasteful if the user of my function may have to recreate the same container from the iterator which would be bad for performance.

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  • How to utilize miniMax algorrithm in Checkers game

    - by engineer
    I am sorry...as there are too many articles about it.But I can't simple get this. I am confused in the implementation of AI. I have generated all possible moves of computer's type pieces. Now I can't decide the flow. Whether I need to start a loop for the possible moves of each piece and assign score to it.... or something else is to be done. Kindly tell me the proper flow/algorithm for this. Thanks

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  • QotD: Maurizio Cimadamore on Project Lambda Binary Snapshots

    - by $utils.escapeXML($entry.author)
    I'm glad to announce that the first binary snapshots of the lambda repository are available at the following URL:http://jdk8.java.net/lambda/As you can imagine, as the implementation of the compiler/libraries is still under heavy development, there are still many rough corners that need to be polished. I'd like to thank you all for all the patience and the valuable feedback provided so far - please keep it coming!Maurizio Cimadamore announcing the Project Lambda binary snapshots on the lambda-dev OpenJDK mailing list.

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  • WebCenter Content Technical Resources

    - by John Klinke
    Some useful WebCenter Content technical resources that you might not be aware of: WebCenter Content Support's Twitter Account: Follow Oracle WebCenter Content Support on Twitter @OrcleWCCSupport to keep informed about webcasts, patches, new releases, tips and tricks, and more. Oracle WebCenter & ADF Architecture Team Blog: Frequent posts by the Oracle Fusion Middleware A-Team discussing WebCenter implementation and configuration topics.  

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  • SCOM, 90 Days In, I

    - by merrillaldrich
    At my office we’re about 90 days into our implementation of System Center Operations Manager for Windows Server and SQL Server monitoring. All in all it’s been a good experience, and I’m really excited to have access to this tool. I’ve logged a fair number of years as a DBA on products like Idera’s SQL Diagnostic Manager and Quest Spotlight on SQL Server Enterprise (and “roll-your-own” solutions) in smaller environments, and liked them, but they always, in my experience, struggled with really large...(read more)

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  • WebM dans Firefox, le nouveau codec vidéo open-source fait son apparition dans une version développe

    Mise à jour du 11/06/10 WebM dans Firefox Le nouveau codec vidéo open-source fait son apparition dans une version développeur du navigateur Jusqu'ici tout le monde était d'accord (sauf Apple) au sujet du WebM, le nouveau codec open-source issu du VP8 de Google. Mais une question de licence (lire par ailleurs) avait posé quelques problèmes pour le début de son implémentation dans les navigateurs. Ces problèmes sont aujourd'hui et réglés et Mozilla tient p...

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  • Maxco Quickly Implements JD Edwards World A9.1

    David Bryant, Vice President and CFO of Maxco, explains to Cliff why Maxco chose to be one of the first to implement JD Edwards World A9.1, how the implementation is going to be a huge competitive advantage for Maxco and its customers, and the value Bryant sees in being part of the Quest User Group community.

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  • Qt et Zeroconf, ou l'utilisation de services réseau sans configuration, un article de Trenton Schulz traduit par charlespf

    Bonjour est l'implémentation d'Apple concernant le réseau sans configuration (Zeroconf), grâce auquel plusieurs applications offrent leurs services à un réseau local. Utiliser Bonjour simplifie grandement la découverte et l'utilisation des services réseau. Dans cet article, on créera des objets Qt pour manipuler les différentes parties de Bonjour et ensuite on les utilisera dans des exemples d'applications réseau avec Qt.

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  • Is this paragraph in Code Complete 2 backwards, or am I misunderstanding it?

    - by user828584
    In chapter 13, when talking about pointers, there is a paragraph: Sometimes, however, you would like to have the semantics of pass by reference—that is, that the passed object should not be altered—with the implementation of pass by value—that is, passing the actual object rather than a copy. It seems like the author made a mistake and mixed the two up. Is this true, or am I not understanding what he's saying correctly?

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