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  • an error within context

    - by helloWorld
    can somebody please explain my mistake, I have this class: class Account{ private: string strLastName; string strFirstName; int nID; int nLines; double lastBill; public: Account(string firstName, string lastName, int id); friend string printAccount(string firstName, string lastName, int id, int lines, double lastBill); } but when I call it: string reportAccounts() const { string report(printAccountsHeader()); for(list<Account>::const_iterator i = listOfAccounts.begin(); i != listOfAccounts.end(); ++i){ report += printAccount(i->strFirstName, i->strLastName, i->nID, i->nLines, i->lastBill);; } return report; } I receive error within context, can somebody explain why? thanks in advance

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  • weird index behavior

    - by TasostheGreat
    I have set up my table with an index only on done_status(done_status =INT), when I use EXPLAIN SELECT * FROM reminder WHERE done_status=2 i get this back id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE reminder ALL done_status NULL NULL NULL 5 Using where but when I give this command EXPLAIN SELECT * FROM reminder WHERE done_status=1 that's what I get back: id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE reminder ref done_status done_status 4 const 2 first time it shows me it uses 5 rows second time 2 rows I don't think the index works, if I understood it right first time it should give me 3 rows. What do I do wrong? SHOW INDEX FROM reminder: Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment reminder 1 done_status 1 done_status A 5 NULL NULL BTREE

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  • Comparison of Architecture presentation patterns MVP(SC),MVP(PV),PM,MVVM and MVC

    This article will compare four important architecture presentation patterns i.e. MVP(SC),MVP(PV),PM,MVVM and MVC. Many developers are confused around what is the difference between these patterns and when should we use what. This article will first kick start with a background and explain different...Did 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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  • Comparison of Architecture presentation patterns MVP(SC),MVP(PV),PM,MVVM and MVC

    This article will compare four important architecture presentation patterns i.e. MVP(SC),MVP(PV),PM,MVVM and MVC. Many developers are confused around what is the difference between these patterns and when should we use what. This article will first kick start with a background and explain different...Did 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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  • Article: Interceptors 1.1 in Java EE 6

    - by OracleTechnologyNetwork
    This Tip Of The Day (TOTD) attempts to explain the basics of Interceptors 1.1 - a "new" specification introduced in the Java EE 6. Interceptors do what they say - they intercept on invocations and lifecycle events on an associated target class. The specification is not entirely new as the concept is borrowed from the EJB 3.0 specification.

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  • Explaining interfaces to beginning programmers?

    - by cbmeeks
    I've had discussions with other programmers on interfaces (C#). I tried to use the analogy of interfaces being like a contract between programmers. Meaning that when you design to an interface, you are designing to a "thought out plan". This didn't fly. The other programmers (limited experience) couldn't get the concept. Or worse, refused to participate. How do you explain to people like that there are reasons to use interfaces? Thanks

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  • Visual Studio 2010 and .NET Framework 4 IDE Enhancements –Part3

    In my previous article I explained some of the nice features related to IDE, in continuation to that I am going to explain Add Reference enhancements for developers, Windows 7 support for developers, Share Point 2010 enhancements , Office Business Application Support, Cloud Development, Document Map Margin and Visual Studio 2010 Tips

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  • A quick note about the end of SQL Server 2005 mainstream support

    - by AaronBertrand
    In a previous blog post about Service Pack 4 , I said the following: "...from this point forward all you're likely to see are cumulative updates to the SP3 and SP4 branches and, roughly a year from today, mainstream support will only need to maintain the SP4 branch. You can read more about this in the following blog post from the CSS blog: Mainstream vs Extended Support and SQL Server 2005 SP4: Can someone explain all of this? " In that post, I focused on these words in the product lifecycle chart:...(read more)

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  • What is Quantum Computing? Microsoft’s video explains it in simple language

    - by Gopinath
    Quantum Computing is the next promising big thing to happen in computer science and its going to revolutionize the way we solve problem using computers. To explain the concepts of Quantum Computing to common man, Microsoft released a nice video which gives brief introduction to the concepts, explains the benefits and the work being carried out by Microsoft to make this technology research a reality. Check out this embedded video and visit Microsoft’s website for more details on Quantum Computing.

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  • Unity3d Gravity script issues

    - by Joseph Le Brech
    I'm try this script out http://wiki.unity3d.com/index.php/Gravity and I'm having some issues with it (it seemed to work when I tried it with an old version of unity) the first issue is of collision, the objects (in my case spheres) will stick into each other rather than just touch. and the second is that when the objects collide one of the objects with continue it's trajectory. I'm thinking of rewriting the script from scratch unless someone can explain what's wrong with the script that i've got.

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  • Warning: LBA32 addressing assumed

    - by user197194
    Warning: LBA32 addressing assumed when i read this and my server is rebooting, it wont boot again. I have to boot from USB, repair bootloader and then its rebooting again, but after the next update of the Linux Kernel (i think that is it) i will read that again and blah blah. Can anyone explain how to fix that permanently? I usually use Grub, but when this error hits, he tries to boot with Lilo. Greeetz and Thanks in advance!

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  • Search Engine Optimization - The Importance of Page Optimization in Search Engine Optimization

    In order for your website to rank well, your internal linking structure is critical to your success. This is covered some of the theory for this in various articles and blogs about Page Structure of a website, which said how you should map out the physical linking structure, but in this guide I will explain more about the importance of interlinking your pages, while using your targeted keyword in your anchor text.

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  • Developing your Data Access Layer with ADO.NET Entity Framework 4

    Entity Framework has evolved in the light of feedback. ADO.NET Entity Framework 4 is now better able to accommodate different development methodologies. A welcome improvement is the way that, the application designer now has a range of options in the way that Entity Framework creates the Data Access layer. Prasanna returns to Simple-Talk to explain the significance of the changes.

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  • Part 2: The Customization Lifecycle

    - by volker.eckardt(at)oracle.com
    To understand the challenges when working with Customizations better, please allow me to explain my understanding from the Customization Lifecycle.  The starting point is the functional GAP list. Any GAP can lead to a customization (but not have to). The decision is driven by priority, gain, costs, future functionality, accepted workarounds etc. Let's assume the customization has been accepted as such - including estimation. (Otherwise this blog would not have any value)Now the customization life-cycle starts and could look like this:-    Functional specification-    Technical specification-    Technical development-    Functional setup-    Module Test-    System Test-    Integration Test (if required)-    Acceptance Test-    Production mode-    Usage-    10 x Rework-    10 x Retest -    2 x Upgrade-    2 x Upgrade Test-    Usage-    10 x Rework-    10 x Retest -    1 x Upgrade-    1 x Upgrade Test-    Usage-    Review for Retirement-    Accepted Retirement-    De-installationWhat I like to highlight herewith is that any material and documentation you create upfront or during the first phases will usually be used multiple times, partial or complete, will be enhanced, reviewed, retested. The better the quality right from the beginning is, the better we can perform the next steps.What I see very often is the wish to remove a customization, our customers are upgrading and they like to get at least some of the customizations replaced with standard functionality. To be able to support this process best, the customization documentation should contain at least the following key information: What is/are the business process(es) where this customization is used or linked to?Who was involved in the different customization phases?What are the objects comprising the customization?What is the setup necessary for the customization?What setup comes with the customization, what has to be done via other tools or manually?What are the test steps and test results (in all test areas)?What are linked customizations? What is the customization complexity?How is this customization classified?Which technologies were used?How many days were needed to create/test/upgrade the customization?Etc.If all this is available, a replacement / retirement can be done much more efficient and precise, or an estimation and upgrade itself can be executed with much better support.In the following blog entries I will explain in more detail why we suggest tracking such information, by whom this task shall be done and how.Volker Eckardt

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