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• Oracle Exalogic: Simple IT Operations, Great Application Experience

  - by Michelle Kimihira

  See a demo featuring Yoav Eilat, Director of Product Marketing. Yoav demonstrates how easy it is to deploy new applications and how administrators can manage the entire system from a single console on Exalogic. Click here to view. Additional Information Product Information on Oracle.com: Oracle Fusion Middleware, Oracle Exalogic Follow us on Twitter and Facebook Subscribe to our regular Fusion Middleware Newsletter

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• Reading Data from the Entire Surface of a CD, DVD

  - by Hypertext

  Is it possible to retrieve data from the entire surface of a compact disc. Suppose a CD written with 300MB of data where the remaining 400MB is blank. Normally, computer doesn't bother with the 400MB region when reading it because the filesystem ends at 300MB. But, is it possible to make the CD drive retrieve data from the rest of the surface. Idea is to retrieve something from outside the image. If possible, true it might return useless 0s or 255s data. But, is it really possible?

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• AJI Software is now a Microsoft Gold Application Lifecycle Management (ALM) Partner

  - by Jeff Julian

  Our team at AJI Software has been hard at work over the past year on certifications and projects that has allowed us to reach Gold Partner status in the Microsoft Partner Program.  We have focused on providing services that not only assist in custom software development, but process analysis and mentoring.  I definitely want to thank each one of our team members for all their work.  We are currently the only Microsoft Gold ALM Partner for a 500 mile radius around Kansas City. If you or your team is in need of assistance with Team Foundation Server, Agile Processes, Scrum Mentoring, or just a process/team assessment, please feel free to give us a call.  We also have practices focused on SharePoint, Mobile development (iOS, Android, Windows Mobile), and custom software development with .NET.  Technorati Tags: Gold Partner,ALM,Scrum,TFS,AJI Software

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• WPF custom control derived from ComboBox that shows a Data

  Create a custom WPF control that derives from ComboBox and create a property where its value will be used as the content of the dropdown  read moreBy Michael DetrasDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• OSS App Hackathon @ National Information Society Agency

  - by Edward J. Yoon

  Yesterday, there was a OSS App Hackathon arranged by the NIA (National Information Society Agency) in Seoul. I attended as a panel of judges w/ Prof. Lee of the Next, NHN University. A lot of people were in there. You can read more details (Korean news) here:  - http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=105&oid=138&aid=0001997038

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• Attaining credit card data

  - by Adam

  I've read the many posts on this site that say we are not allowed to store cc numbers if we are not pci-compliant. But, I'm wondering if it is possible to send a CC number through a form to an email address? Would that be still infringing on the standards? The reason I ask is that a local business owner wants to retrieve a number through a form on his website, so he can manually enter the cc info on his end. I'm assuming the only way to properly get a credit card number is to setup a merchant account? What's the best way to get a cc number without calling the actual customer? I'm thinking email is a bad idea as well.

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• Design patterns for effects between actors and technology

  - by changelog

  I'm working on my first game, and taking the opportunity to brush up my C++ (I want to make as much of it as portable as I can.) Whilst working on the technology tree and how it affects actors (spaceships, planets, crew, buildings, etc) I can't find a pattern that decouples these entities enough to feel like a clean approach. Just as an idea, here's the type of effects these actors can have on one another (and techs too) An engineer inside a spaceship boosts its shield A hero in a spaceship in a fleet increases morale A technology improves spaceships' travel distance A building in a planet improves its production The best I can come up with is the Observer pattern, and basically manage it more or less manually (when a crew member enters a spaceship, fire the event; when a new building is built in a planet, fire the event, etc etc.) but it seems to be too tightly coupled to me. I would love to get some ideas about how to approach this better.

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• Worldwide Application Infrastructure, Middleware Market Revenue Increased 2.8 Percent in '09

  Despite the poor economy, adoption of service-oriented architecture (SOA) and business process management helped this segment of the software market grow.

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• Using The Data Mining Query Task in SSIS

  SQL Server Integration Services (SSIS) is a Business Intelligence tool which can be used by database developers or administrators to perform Extract, Transform & Load (ETL) operations. In my previous article Using Analysis Services Processing Task & Analysis Services ... [Read Full Article]

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• How to track vehicles with GPS and have that data available for an app

  - by Blaz Art

  What type of hardware and software architecture would you recommend for the task of somehow tracking a vehicle for the convenience of the app user to know where the vehicle is? I realize there are many ways to do it, but all them I think have to include this (correct me if im wrong) a gps tracking device inside the vehicle a way transmitting the gps location to a server from within the vehicle a server which tells the apps the locations of the vehicle the app

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• Worldwide Application Infrastructure, Middleware Market Revenue Increased 2.8 Percent in '09

  Despite the poor economy, adoption of service-oriented architecture (SOA) and business process management helped this segment of the software market grow.

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• What is the name of this tree?

  - by Daniel

  It has a single root and each node has 0..N ordered sub-nodes . The keys represent a distinct set of paths. Two trees can only be merged if they share a common root. It needs to support, at minimum: insert, merge, enumerate paths. For this tree: The +-------+----------------+ | | | cat cow dog + +--------+ + | | | | drinks jumps moos barks + | milk the paths would be: The cat drinks milk The cow jumps The cow moos The dog barks It's a bit like a trie. What is it?

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• comparison of an unsigned variable to 0

  - by user2651062

  When I execute the following loop : unsigned m; for( m = 10; m >= 0; --m ){ printf("%d\n",m); } the loop doesn't stop at m==0, it keeps executing interminably, so I thought that reason was that an unsigned cannot be compared to 0. But when I did the following test unsigned m=9; if(m >= 0) printf("m is positive\n"); else printf("m is negative\n"); I got this result: m is positive which means that the unsigned variable m was successfully compared to 0. Why doesn't the comparison of m to 0 work in the for loop and works fine elsewhere?

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• Analyzing Memory Usage: Java vs C++ Negligible?

  - by Anthony

  How does the memory usage of an integer object written in Java compare\contrast with the memory usage of a integer object written in C++? Is the difference negligible? No difference? A big difference? I'm guessing it's the same because an int is an int regardless of the language (?) The reason why I asked this is because I was reading about the importance of knowing when a program's memory requirements will prevent the programmer from solving a given problem. What fascinated me is the amount of memory required for creating a single Java object. Take for example, an integer object. Correct me if I'm wrong but a Java integer object requires 24 bytes of memory: 4 bytes for its int instance variable 16 bytes of overhead (reference to the object's class, garbage collection info & synchronization info) 4 bytes of padding As another example, a Java array (which is implemented as an object) requires 48+bytes: 24 bytes of header info 16 bytes of object overhead 4 bytes for length 4 bytes for padding plus the memory needed to store the values How do these memory usages compare with the same code written in C++? I used to be oblivious about the memory usage of the C++ and Java programs I wrote, but now that I'm beginning to learn about algorithms, I'm having a greater appreciation for the computer's resources.

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• Uninstalling application built from source

  - by Nik

  I know that Ubuntu has come a long way in helping new users to get used to their linux system..and making things as easy as possible. One most important aspect is installing and uninstalling applications in ubuntu. Thanks to Ubuntu Software Center it is a breeze! However I noticed that when I compiled and installed a game from its source (battleship), it does not appear under the history tab in the Ubuntu Software Center. And also you cannot uninstall it through the software center but have to resort to the command line to do this. I do not mind doing it however I am sure some other users might not be comfortable with this. Is this a bug?

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• Does Unity support disabling the global application menu?

  - by Michael E

  I'm fairly excited for Unity, as it looks like a promising new direction for Ubuntu. However, I do have a concern - will it be possible to use Unity without the global menu? I have my window manager set to focus-follows-mouse/sloppy focus, and find the productivity gains to be immense. Sloppy focus is incompatible, however, with global menus, as it is possible for the focus to change while you move from window to menu. Will Unity support an option to use window menus while still using Unity?

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• Upgrading Oracle Siebel CRM Application Without Downtime

  - by Doug Reid

  Oracle’s Siebel Customer Relationship Management (CRM) software helps organizations differentiate their businesses to achieve top- and bottom-line growth. Siebel CRM delivers comprehensive solutions that are tailored to more than 20 different industries. As Siebel CRM implementations have evolved into mission critical, operational business processes that must operate 24/7, companies are finding it increasingly difficult to afford the downtime typically required to perform an in-place upgrade. Without these upgrades, businesses loose out on critical new features and functionality. With Oracle GoldenGate, customers don’t have to choose between upgrades and outages. Oracle GoldenGate allows Siebel CRM customers to perform upgrades with zero downtime. Now Siebel customers can always take advantages of the latest innovations in customer relationship management without having to worry about potential lost revenue due to downtime. Oracle GoldenGate provides three different deployment models for Siebel CRM zero downtime upgrades that are designed to meet differing customer requirements. These range from a basic unidirectional model, which is designed to work out-of-the-box, to the most sophisticated active-active model for phased migrations. If you have mission-critical Siebel CRM implementations I recommend that you watch the screencast below to learn how you can begin taking advantage of all the latest Siebel enhancements without having any downtime. This screencast is also available on Oracle Media Network and Oracle's YouTube channel. For even more details I recommend reading the whitepaper Upgrading Siebel CRM with Zero Downtime .

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• Spreadsheet or writing an application?

  - by Lenny222

  When would you keep simple to medium-complex personal calculations in a spread sheet (Excel etc) and when would you write a small program or script for it? For example when you want to calculate what size of mortgage you can afford to buy a house. I could create a spreadsheet and have a nice tabular representation. On the other hand, if i would write a small script in a nice language (in my case Haskell), i'd have the security of a nice type system, preventing typos etc. What are the pro/cons in your opinion?

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• How exactly is an Abstract Syntax Tree created?

  - by Howcan

  I think I understand the goal of an AST, and I've build a couple of tree structures before, but never an AST. I'm mostly confused because the nodes are text and not number, so I can't think of a nice way to input a token/string as I'm parsing some code. For example, when I looked at diagrams of AST's, the variable and its value were leaf nodes to an equal sign. This makes perfect sense to me, but how would I go about implementing this? I guess I can do it case by case, so that when I stumble upon an "=" I use that as a node, and add the value parsed before the "=" as the leaf. It just seems wrong, because I'd probably have to make cases for tons and tons of things, depending on the syntax. And then I came upon another problem, how is the tree traversed? Do I go all the way down the height, and go back up a node when I hit the bottom, and do the same for it's neighbor? I've seen tons of diagrams on ASTs, but I couldn't find a fairly simple example of one in code, which would probably help.

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• Inspecting the model in a Rails application

  - by Matt Sherman

  I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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• Why is chunk size often a power of two?

  - by danijar

  There are many Minecraft clones out there and I am working on my own implementation. A principle of terrain rendering is tiling the whole world in fixed size chunks to reduce the effort of localized changes. In Minecraft the chunk size is 16 x 16 x 256 as far as I now. And in clones I also always saw chunk sizes of a power of the number 2. Is there any reason for that, maybe performance or memory related? I know that powers of 2 play a special role in binary computers but what has that to do with the chunk size?

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• The application attempted to perform an operation not allowed by the security policy

  - by user16521

  I ran this command on the server that has the share of code that my local IIS site set to (Via UNC to that share): http://support.microsoft.com/kb/320268 Drive:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\caspol.exe -m -ag 1 -url "file:////\\computername\sharename\*" FullTrust -exclusive on (obviously I replaced Drive with C, and the actual computername and sharename with the one I'm sharing out). But when I run the ASP.NET site, I am still getting this runtime exception: Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

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• Associative array challenges, or examples?

  - by Aerovistae

  I understand well when and how to use an associative array, but I'm trying to teach a friend to program and I'm having some trouble with this particular concept. I need a good set of problems whose solutions are best implemented through the use of maps/hashes/associative arrays/dictionaries. I googled all over and couldn't find any. I was hoping someone might know of some, or perhaps get a community wiki sort of answer. That way I can say, here's our problem, and here's how we could effectively solve it through the use of an associative array... It's one of those cases where when I'm programming and I run into a situation that calls for a dictionary, I recognize it, but I can't seem to make up any such situations to use for a demonstration.

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• Is it important to obfuscate C++ application code?

  - by user827992

  In the Java world, it seems to sometimes be a problem, but, what about C++? Are there different solutions? I was thinking about the fact that someone can replace the C++ library of a specific OS with a different version of the same library, but full of debug symbols to understand what my code does. IS tt a good thing to use standard or popular libraries? This can also happen with some dll library under Windows replaced with the "debug version" of that library. Is it better to prefer static compilation? In commercial applications, I see that for the core of their app they compile everything statically and for the most part the dlls (dynamic libraries in general) are used to offer some third party technologies like anti-piracy solutions (I see this in many games), GUI library (like Qt), OS libraries, etc. Is static compilation the equivalent to obfuscation in the Java world? In better terms, is it the best and most affordable solution to protect your code?

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• Using Python to traverse a parent-child data set

  - by user132748

  I have a dataset of two columns in a csv file. Th purpose of this dataset is to provide a linking between two different id's if they belong to the same person. e.g (2,3,5 belong to 1) e.g COLA COLB 1 2 ; 1 3 ; 1 5 ; 2 6 ; 3 7 ; 9 10 In the above example 1 is linked to 2,3,5 and 2 is the linked to 6 and 3 is linked to 7. What I am trying to achieve is to identify all records which are linked to 1 directly (2,3,5) or indirectly(6,7) and be able to say that these id's in column B belong to same person in column A and then either dedupe or add a new column to the output file which will have 1 populated for all rows that link to 1 e.g of expected output colA colB GroupField 1 2 1; 1 3 1; 1 5 1 ; 2 6 1 ;3 7 1; 9 10 9; 10 11 9 I am a newbie and so am not sure on how to approach this problem.Appreciate any inputs you'll can provide.

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