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• Oracle Database 12c is here!

  - by Maria Colgan

  Oracle Database 12c was officially release today and is now available for download. Along with the software release comes a whole new set of collateral that explains in detail all of the new features and functionality you will find in this release. The Optimizer page on Oracle.com has all the juicy details about what you can expect from the Optimizer in Oracle Database12c.  There you will find the following 3 new white papers; What to expect from the Oracle Optimizer in Oracle Database 12c SQL Plan Management with Oracle Database 12c Understanding Optimizer Statistics with Oracle Database 12c Over the coming months we will also present an in-depth series of blog posts on all of the cool new Optimizer features in 12c so stay tuned for that and happy reading! +Maria Colgan

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• Acceptable GC frequency for a SlimDX/Windows/.NET game?

  - by Rei Miyasaka

  I understand that the Windows GC is much better than the Xbox/WP7 GC, being that it's generational and multithreaded -- so I don't need to worry quite as much about avoiding memory allocation. SlimDX even has some unavoidable functions that generate some amount of garbage (specifically, MapSubresource creates DataBoxes), yet people don't seem to be too upset about it. I'd like to use some functional paradigms to write my code too, which also means creating objects like closures and monads. I know premature optimization isn't a good thing, but are there rules of thumb or metrics that I can follow to know whether I need to cut down on allocations? Is, say, one gen 0 GC per frame too much? One thing that has me stumped is object promotions. Gen 0 GCs will supposedly finish within a millisecond or two, but if I'm understanding correctly, it's the gen 1 and 2 promotions that start to hurt. I'm not too sure how I can predict/prevent these.

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• DB Enterprise User Security Integration With Directory Services

  - by Etienne Remillon

  Gain a better understanding of how to integrate Enterprise User Security (EUS) with various Directories by attending this 1 hour Advisor Webcast!  When: July 11, 2012 at 16:00 UK / 17:00 CET / 08:00 am Pacific / 9:00 am Mountain / 11:00 am Eastern Enterprise User Security (EUS) is a DB feature to externalize, and centrally manage DB users in a directory server. The webcast will briefly introduce EUS, followed by a detailed discussion about the various directory options that are supported, including integration with Microsoft Active Directory. We'll conclude how to avoid common pitfalls deploying EUS with directory services. TOPICS WILL INCLUDE: - Understand EUS basics - Understand EUS and directory integration options - Avoid common EUS deployment mistakes Make sure to register and mark this date on your calendar! - Details and registration.

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• should i take Exam 70-515 or should i wait for Exam 70-480 ? [closed]

  - by Filip

  As it states on Microsoft site exam 70-515 is scheduled to retire July 31, 2013. His successor is suppose to be exam 70-480 in my understanding. I know most of the stuff in exam 70-515 but it will take me like one mount to read the book from Microsoft Press Resource Center and get ready for the exam, also i will be paying for the exam not the company i work for. So i think it is better to start reading books and forums that concentrate on how and for what will be exam 70-480 then paying for something that will not be valued for ~ 1 year from now. Whats your thoughts/suggestions ?

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• How to Comment Out and Uncomment Lines in a Configuration File

  - by Chris Hoffman

  You may have seen instructions that tell you to “uncomment” or “comment out” lines in a configuration or source code file. This is a simple process, but may not be self-explanatory to people that don’t understand the file’s structure. The interpreter ignores lines marked as comments, which are only to aid humans in understanding the file. Because of this, comments can be used to disable or enable configuration options in configuration files. How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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• structure problem in Relational DBMS creation

  - by Kane

  For learning and understanding purpose, I currently want to try to make a small relational DBMS with simple features like (for now) only sequential reading/writing and CREATE TABLE, INSERT, SELECT, UPDATE and DELETE management. I am currently on the "think" part of the project and I am stuck on the way to store the read data in memory. First I was thinking of putting them properly on a structure, but the problem is that tables are all different, know the type of each column is not an issue, but I am not sure C provide a way to make fully dynamic structure. My second and current idea is to make a simple char array of the required length and just get the data by order with cast. But I am not sure if it is the good way to do that part, so I wanted to ask for your opinion and advices about that. Thanks in advance for your help. nb: I hope my question is enough clear and understandable, I still lack of pratice in english

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• Origins of code indentation

  - by Daniel Mahler

  I am interested in finding out who introduced code indentation, as well as when and where it was introduced. It seems so critical to code comprehension, but it was not universal. Most Fortran and Basic code was (is?) unindented, and the same goes for Cobol. I am pretty sure I have even seen old Lisp code written as continuous, line-wrapped text. You had to count brackets in your head just to parse it, never mind understanding it. So where did such a huge improvement come from? I have never seen any mention of its origin. Apart from original examples of its use, I am also looking for original discussions of indentation.

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• Version Changes: How considerable are the compatibility issues in project?

  - by Aditya P

  For example if we consider ActionScript2.0(based on Objects but programming does not implement much OOP ) vs 3.0(highly OOP) its like a whole new scripting language in the sense of approach, programming style,features you get the idea. In PHP we can see current versions going from 3-5. brief version changes Question :Developers who work on PHP is it easy to migrate from version to version? Question :Are there any extensive compatibility issues, forward or backward? Question :Does your project stick to a particular version till the end ? Question :Does the programming style ,approach change from version to version? Question :If you had to get started on PHP to contribute to a project built earlier versions, would learning the latest version be counterproductive towards this aim? Some related topics i had come across on SE How should I be keeping track of php script version/changes? What is happening to PHP 6? It would be Really helpful in understanding if you could answer this topic directly to the questions put forth.

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• Why is implementing copy-paste in a touch screen based smartphone such a big deal?

  - by EpsilonVector

  I'm not entirely sure this is on-topic, but it definitely needs a programmer's understanding to be answered, and deals with general development (for a specific scenario) as opposed to a specific piece of code. In a way it also translates into "what are the challenges in doing X in a touch screen app", and similar questions have been asked here in the past. So here it is: When Apple didn't implement copy-pasting on the iPhone since version 1 I just assumed it was a UI issue- they were waiting until they figured out a good UI for it. But now the idea is out there, and Microsoft still released Windows Phone 7 without copy-pasting, promising it'll be ready in a few months. My question is: why does this takes a few months to implement? Are there some technological challenges that are unique to programming for a touch screen that I'm not familiar with?

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• Does google contribute ranking from cdn.example.com to example.com?

  - by DesignerGuy

  Background From my understanding, http://mywebsite.com/image.jpg, can help the ranking of http://mywebsite.com in a search engine, such as Google (obviously the search engine of primary concern). So, SEO-wise, moving an image to http://whatever-cdn.com/my-account/image.jpg is bad. A popular solution is to use a CNAME record, such as http://cdn.mywebsite.com, so that image.jpg can be accessed at http://cdn.mywebsite.com/image.jpg. The question Does http://cdn.mywebsite.com/image.jpg rank as effectively as http://mywebsite.com/image.jpg ? Does it help boost the main http://mywebsite.com ? Or, does it rank independently because it is a subdomain? Is there another option (a way to use a CDN without sacrificing ranking)?

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• Choosing a subject to create a site for

  - by Daniel

  For 6 years I'm working as web developer and I would like to finally create my own site. I thought I have everything needed: programming and administration skills, found a good designer, own servers and understanding how to operate site. But I've missed very important (or the most important) point: how do I find a subject for my site? My hobby and my work are the same: IT, but I don't want to create just another tech blog or news aggregator, I want something different. First I thought things like Google Trends or Google top 1000 could help, but I've got lost in thousands of options I can't see them all (I actually can, but it'll take at least a couple of month). So my question is: how did you start? Where did you get the idea?

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• HTML5 article tag application for the iPad/iPhone

  - by dspencer

  I've used article tags on websites. My understanding and practice is to use the article tag for publication content. I always use HTML/HTML5 tags as their intended purposes and not at will. Recently, I've seen an HTML template that uses the article tag for the non-publication page content such as the content of an About Us page or any other generic page. I asked the why it was used this way and the (vague) explanation was that it had to do with the way the iPad read the tag. Is this true?

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• Interacting with scene from controller/app delegate cocos2d

  - by cjroebuck

  I'm attempting to make my first cocos2d (for iphone) multiplayer game and having difficulty understanding how to interact with a scene once it is running. The game is a simple turn-based one and so I have a GameController class which co-ordinates the rounds. I also have a GameScene class which is the actual scene that is displayed during a round of the game. The basic interaction I need is for the GameController to be able to pass messages to the GameScene class.. such as StartRound/StopRound etc. The thing that complicates this is that I am loading the GameScene with a LoadingScene class which simply initialises the scene and replaces the current scene with this one, so there is no reference from GameController to GameScene, so passing messages is quite tricky. Does anyone have any ways to get around this, ideally I would still like to use a Loading class as it smooths out the memory hit when replacing scenes.

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• Cannot install Android 2.3 libs dies to missing ia32-libs-multiarch

  - by Enrique

  I need to get my box up to par or android development, but cannot get ia32-libs to install for the life of me. Can anyone help? The error Android's tool gave me was Stopping ADB server failed (code -1) and after a bit of investigation I found that I needed to install the ia32-libs which from my understanding is a pain. Ubuntu 12.04 (x64) xxx@xxx:~$ sudo apt-get -f install ia32-libs Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: ia32-libs : Depends: ia32-libs-multiarch E: Unable to correct problems, you have held broken packages.

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• Spherical harmonics lighting - what does it accomplish?

  - by TravisG

  From my understanding, spherical harmonics are sometimes used to approximate certain aspects of lighting (depending on the application). For example, it seems like you can approximate the diffuse lighting cause by a directional light source on a surface point, or parts of it, by calculating the SH coefficients for all bands you're using (for whatever accuracy you desire) in the direction of the surface normal and scaling it with whatever you need to scale it with (e.g. light colored intensity, dot(n,l),etc.). What I don't understand yet is what this is supposed to accomplish. What are the actual advantages of doing it this way as opposed to evaluating the diffuse BRDF the normal way. Do you save calculations somewhere? Is there some additional information contained in the SH representation that you can't get out of the scalar results of the normal evaluation?

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• When creating a new text file, should I add a .txt extension to its name?

  - by Agmenor

  When I create a new document aimed at containing only plain text, I am not obliged by Ubuntu to add a .txt extension to its name. It works indeed very well: gedit opens it without problem, understanding very well that it is only text. The only two pro arguments I have found from now on for adding an extension are 1/ interoperability with Windows systems and 2/ avoiding confusion with folders having the same name. Nevertheless those two arguments do not convince me at all. As a consequence, should I keep the reflex of adding an extension to files or not?

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• Is Java's ElementCollection Considered a Bad Practice?

  - by SoulBeaver

  From my understanding, an ElementCollection has no primary key, is embedded with the class, and cannot be queried. This sounds pretty hefty, but it allows me the comfort of writing an enum class which also helps with internationalization (using the enum key for lookup in my ResourceBundle). Example: We have a user on a media site and he can choose in which format he downloads the files @Entity @Table(name = "user") public class User { /* snip other fields */ @Enumerated @ElementCollection( targetClass = DownloadFilePreference.class, fetch = FetchType.EAGER ) @CollectionTable(name = "download_file_preference", joinColumns = @JoinColumn(name = "user_id") ) @Column(name = "name") private Set<DownloadFilePreference> downloadFilePreferences = new HashSet<>(); } public enum DownloadFilePreference { MP3, WAV, AIF, OGG; } This seems pretty great to me, and I suppose it comes down to "it depends on your use case", but I also know that I'm quite frankly only an initiate when it comes to Database design. Some best practices suggest to never have a class without a primary key- even in this case? It also doesn't seem very extensible- should I use this and gamble on the chance I will never need to query on the FilePreferences?

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• What are Collaboration Data Objects (CDO)?

  - by Pranav

  Collaboration Data Objects or CDO, is a component that enables messaging between applications. It's something like the MFC we have in VC++ that enables us to prefer a simpler interface compared to the WIN32 API which, as an interface, still requires lots of escalation work by developers (yet very robust!). CDO is primarily built to simply the creations of messaging applications and we should keep in mind that CDO is NOT a new messaging model but is BUILT ON the MAPI architecture. It is just an extended interface that collaborates with MAPI and simplifies the programming task at hand for creation of messaging applications. CDO replaced Microsoft's earlier Active Messaging. CDO 1.2 enables us to play around with Data, send, receive emails and a host of other functions like rendering in exchange functionalities into HTML and do loads of other stuff. If you've got some firsthand experiences, a couple of tips will be great and will defiantly further my knowledge base in this area and hopefully get me a more refined understanding. Some pointers on MAPI will be pretty cool.

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• XNA Transparency depending on drawing order?

  - by DarthRoman

  I am drawing two 3D objects, both of them can fade from opaque to transparent independently, and they can intersect between them (so you cannot say when one of them is before the other one). Look at the image for a better understanding (one of the object is a terrain and the other one an area): Now, if I apply transparency to both of them, and draw the terrain before the area, the terrain is not transparent respecting to the area, but the area is: And finally, if I draw the area before the terrain, then the area is not transparent respecting of the terrain: QUESTION: How can I make all the objects transparent to the rest of objects without depending on the drawing order?

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• Some Insight on the Field of Knowledge Representations

  - by picmate

  I started following an MS in computer sciences after about two years of work for a software company. I worked primarily in data warehousing and business intelligence related software development during my previous occupation. There is a high chance for me to select a research in knowledge representations, ontologies and reasoning, as there are no other research available in any other interesting fields, such as pattern recognition and navigation. I developed an interest towards knowledge representation with what I learnt from the courses I am taking currently. But I do not have a deep understanding of it in terms of which areas such a field would have an impact in a real life scenario, and how it will help me when I am hunting for a job in the near future. Some thought about this would be greatly appreciated.

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• OM: Effective Troubleshooting Techniques to Debug Order Import

  - by ChristineS

  There is a new document available to help you debug Order Import in Order Management:  Effective Troubleshooting Techniques to Debug Order Import Issues (Doc ID 1558196.1) The white paper addresses debugging from a technical perspective. This approach is to assist users in understanding the actual issue, as well as help them in the early resolution of any order import issue. It will walk you through several cases, with supporting debug logs / trace files taken for each case. Educating you along the way for what debug logs / trace files should be gathered, as trace files are not always needed.  It will also walk you through the supporting documents so you will know what to look for in your case. Please refer to this note the next time you have an Order Import error. Or you could step through it now, so you are informed the next time you encounter an Order Import error.  Happy debugging!

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• Introduction to Microsoft SQL Azure: Free self-paced Microsoft class

  - by Jim Duffy

  Here is a wonderful opportunity to take advantage of some FREE Microsoft Learning content on SQL Azure. This self-paced 2 hour class is broken down into 4 segments each with a self test at the end. Class Segments 1) Understanding the SQL Azure Platform 2) Designing Applications for SQL Azure 3) Migrating Applications to SQL Azure 4) Achieving Scale with SQL Azure If you’re getting started with Windows Azure or have been working with it for a while and need to take advantage of the storage capabilities offered by SQL Azure this is going to be a great place for you to start learning. Have a day. :-|

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• Software Architecture - From design to sucessful implementation

  - by user20358

  As the subject goes; once a software architect puts down the high level design and approach to a software that is to be developed from scratch, how does the team ensure that it is implemented successfully? To my mind the following things will need to be done Proper understanding of requirements Setting down coding practices and guidelines Regular code reviews to ensure the guidelines are being adhered to Revisiting the requirements phase and making necessary changes to design based on client inputs if there are any changes to requirements Proper documentation of what is being done in code Proper documentation of requirements and changes to them Last but not the least, implementing the design via object oriented code where appropriate Did I miss anything? Would love to hear any mistakes that you have learned from in your project experiences. What went wrong, what could have been done better. Thanks for taking the time..

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• Do you think code is self documenting?

  - by Desolate Planet

  This is a question that was put to me many years ago as a gradute in a job interview and it's kind of picked at my brain now and again and I've never really found a good answer that satisfies me. The interviewer in question was looking for a black and white answer, there was no middle ground. I never got the chance to ask about the rationale behind the question, but I'm curious why that question would be put to a developer and what you would learn from a yes or no answer? From my own point of view, I can read Java, Python, Delphi etc, but if my manager comes up to me and asks me how far along in a project I am and I say "The code is 80% complete" (and before you start shooting me down, I've heard this uttered in a couple of offices by developers), how exactly is that self documenting? Apologies if this question seems strange, but I'd rather ask and get some opinions on it to gain a better understanding of why it would be put to someone in an interview.

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• How could a human factors degree help a computer scientist?

  - by Bob Dole

  I'm wrapping up a masters in CS and already have half the credit hours needed for a degree in Human Factors. I just recently discovered how useful understanding about cognition can help someone that creates user interfaces and am thirsty for more knowledge in the area. For me, it seems that having both a masters in Human Factors and CS would be very marketable but would there be jobs out there that would allow me to apply both? Meaning what I would really like to do is take the requirements for some application, apply different Human Factors theories( GOMS, CE+ ) to developing the interface, maybe do cognitive walk through with users to optimize the UI, then develop the application. Do jobs out there exist like this? The reason I ask, is because I'm wondering if most places just want you to be either a Human Factors Expert or a Developer but not both.

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