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  • In C and C++, what methods can prevent accidental use of the assignment(=) where equivalence(==) is needed?

    - by DeveloperDon
    In C and C++, it is very easy to write the following code with a serious error. char responseChar = getchar(); int confirmExit = 'y' == tolower(responseChar); if (confirmExit = 1) { exit(0); } The error is that the if statement should have been: if (confirmExit == 1) As coded, it will exit every time, because the assignment of the confirmExit variable occurs, then confirmExit is used as the result of the expression. Are there good ways to prevent this kind of error?

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  • State Transition Constraints

    Data Validation in a database is a lot more complex than seeing if a string parameter really is an integer. A commercial world is full of complex rules for sequences of procedures, of fixed or variable lifespans, Warranties, commercial offers and bids. All this requires considerable subtlety to prevent bad data getting in, and if it does, locating and fixing the problem. Joe Celko shows how useful a State transition graph can be, and how essential it can become with the time aspect added.

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  • an error in .profile file prevents the system from booting?

    - by nafaa
    I tryied to set the JAVA_HOME environmet variable in the ~/.profile file and I made a mistake JAVA_HOME="/usr/lib/jvm/jdk1.6.0_37" PATH=$JAVA_HOME:PATH the error is in the PATH referencing. I put PATH rather than $PATH. this prevents me from login. I tried to edit the file using the recovery mode but it says that the file system is read only. so any suggestions how to deal with this issue. thanks

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  • SQL Server 2012 disponible en version finale : AlwaysOn, Big Data, Power View, Microsoft tient ses promesses

    SQL Server 2012 disponible en version finale AlwaysOn, Big Data, Power View, la plateforme de gestion et d'analyse d'information de Microsoft tient ses promesses Mise à jour du 03/04/2012 Comme l'avait promis Microsoft, la version finale de SQL Server 2012 est disponible depuis le 1er avril, mais a été annoncée officiellement hier. La plateforme de gestion et d'analyse d'information de Microsoft a été conçue pour être l'environnement de référence des applications critiques d'entreprise, offrir une solution décisionnelle plus complète intégrant le Big Data et permettre une meilleure connexion avec le Cloud. ...

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  • Using Visual Studio 2010s Debugger PIN Feature

    One of the very cool new features in Visual Studio 2010 is the ability to Pin a variable you are watching, right in the place you want to see it.  Its always been a hassle to have to add a Watch and keep track of it among all your other watch variables.  I guess I [...]...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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  • 13.04: update-initramfs works but mkinitramfs fails from APT

    - by Phil2.0
    I'm experiencing a strange thing, I've freshly upgraded from 12.10 to 13.04, Everything is fine except that it can't build the initrd image automatically, it fails and prints out the mkinitramfs's Usage output. I tried to debug the "mkinitramfs" script and it appears the $outfile variable is never set. However, I'm able to produce the ramdisk manually like follow: update-initramfs -c -u 3.0.8-23-generic I tried most of the stuff seen on the net: purge, reinstall but no help but nothing, and I can't use linux-image is marked as "broken" but the kernel exists in /boot.

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  • What are the differences between Special Edition and the Third Edition of Stroustrup's The C++ Programming Language?

    - by TheBlueCat
    I'm buying a few C++ books after moving from Java. I obviously want to read the reference manual from the man himself, though I cannot tell the difference between these two editions. The special edition is ten pages shorter than the third edition. However, the special edition is recommended over the third edition and it seems this version covers the ASCII standard when the other edition does not. Can anyone shed a bit of light on this?

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  • MySQL Prepared Statements to Generate Crosstab SQL

    MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values.

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  • MySQL Prepared Statements to Generate Crosstab SQL

    MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values.

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  • MySQL Prepared Statements to Generate Crosstab SQL

    <b>Database Journal:</b> "MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values."

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  • Finding Tools Guidance in OUM

    - by user716869
    OUM is not tool – specific. However, it does include tool guidance.  Tool guidance in OUM includes: a mention of a tool that could be used to complete a specific task(s) templates created with a specific tool example work products in a specific tool links to tool resources Tool Supplemental Guides So how do you find all this helpful tool information? Start at the lowest level first – the Task Overview.  Even though the task overviews are written tool-agnostic, they sometimes mention suggestions, or examples of a tool that might be used to complete the task.  More specific tool information can be found in the Task Overview, Templates and Tools section.  In some cases, the tool used to create the template (for example, Microsoft Word, Powerpoint, Project and Visio) is useful. The Templates and Tools section also provides more specific tool guidance, such as links to: White Papers Viewlets Example Work Products Additional Resources Tool Supplemental Guides If you’re more interested in seeing what tools might be helpful in general for your project or to see if there is any tool guidance for a specific tool that your project is committed to using, go to the Supplemental Guidance page in OUM.  This page is available from the Method Navigation pull down located in the header of almost every OUM page. When you open the Supplemental Guidance page, the first thing you see is a table index of everything that is included on the page.  At the top of the right column are all the Tool Supplemental Guides available in OUM.  Use the index to navigate to any of the guides. Next in the right column is Discipline/Industry/View Resources and Samples.  Use the index to navigate to any of these topics and see what’s available and more specifically, if there is any tool guidance available.  For example, if you navigate to the Cloud Resources, you will find a link to the IT Strategies from Oracle page that provides information for Cloud Practitioner Guides, Cloud Reference Architectures and Cloud White Papers, including the Cloud Candidate Selection Tool and Cloud Computing Maturity Model. The section for Method Tool and Technique Cross References can take you to the Task to Tool Cross Reference.  This page provides a task listing with possible helpful tools and links to more information regarding the tools.  By no means is this tool guidance all inclusive.  You can use other tools not mentioned in OUM to complete an OUM task. The Method Tool and Technique Cross References can also take you to the various Technique pages (Index and Cross References).  While techniques are not necessarily “tools,” they can certainly provide valuable assistance in completing tasks. In the Other Resources section of the Supplemental Guidance page, you find links to the viewlets and white papers that are included within OUM.

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  • More than 5 custom variables across multiple websites using Google Analytics

    - by brakes
    We have multiple websites using the same Google Analytics account number so we can track visitors across multiple websites. One of these websites has set 5 custom variables. We want to introduce a new custom variable to track logged in users for our single sign-on (SSO) system to find out what parts of which website they are accessing. Is this possible or is it a case that all the custom variables have been used up by 1 of the sites?

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  • Hot off the Presses! The June 2014 Procurement News Collection Is Now Available

    - by LindaJ-Oracle
    Welcome To The June 2014 Procurement News CollectionIf you missed the last couple editions of the newsletter, then you will notice that our layout has changed.We want you to get the latest product news as it becomes available. So we have moved our newsletter-type articles to the Oracle EBS Support Blog where we post new product news regularly.This newsletter is now a 'News Collection' which will provide you with an easy reference to the articles that have been blogged since the previous edition.  Check it out here!

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  • Visual Studio 2010 Web Development Improvements

    - by Aamir Hasan
    VS2010 emulates what is available in previous framework versions through reference assemblies. These assemblies contain metadata that describes functionality available in previous versions. VS2010 itself uses the .NET 4 framework, so when adding multitargeting support the team decided against running a previous framework version inside the same process. When your application is compiled to 100 percent guarantee application compatibility, previous compiler versions are used.Web development in Visual Studio 2010 has been enhanced for greater CSS compatibility, increased productivity through HTML and ASP.NET markup snippets and new dynamic IntelliSense JavaScript.Improved CSS CompatibilityHTML and JavaScript SnippetsJavaScript IntelliSense Enhancements

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  • How to run an application using sudo without a password?

    - by tutuca
    ... but still be required for applications that need admin privilegies? In order to allow the following: $ apache2ctl restart httpd not running, trying to start (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs $ sudo !! sudo apache2ctl restart #no password asked $ #works! For reference I've seen this setup on amazon's e3 instances Any idea?

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  • Storing data on server [closed]

    - by Maciekp
    1.How am I supposed to store data on server, using not only: databases,text files and images? And how someone could implement storing data in fb's graph api http://developers.facebook.com/docs/reference/api/ , so when I go to: https://graph.facebook.com/19292868552 it shows me such data(how it can be stored? I guess it's not Mysql database) PS. Link to article: http://jayant7k.blogspot.com/2009/05/how-facebook-stores-billions-of-photos.html <- How can concurrent users writing requests be solved(while storing data in text file).

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  • google analytics statistics

    - by colmcq
    I am compiling a report for a client using google analytics. I have observed that the client has unusually good page view times (5 mins) and excellent bounce rates (<25%). I need to reference research data that validates my assertion that these figures are excellent compared to an industry standard (the industry is ecommerce and gaming). Can you direct me to any published research data that specifies normal bounce rates and page view times for this industry?

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  • How to grep (or find) on cPanel?

    - by San
    How can I search for a specific string (function name or a variable name) in my files which are in various directories under cPanel file manager? I have been using a library directory and functions on that directory are used in various apps and pages. Now, I am in a situation to change something in the library file, for which I need to know the impact on files which use this library file functions. How to search / find / grep through the files hosted?

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  • Taking too long to get skills for entry level programmer position [closed]

    - by greenonion
    I don't have the skills for an entry level position as a .Net programmer. I am trying to learn what I need but there is too much to learn and too little time. What can I do? About two months ago, I went to a job interview for an entry level C# .Net programming/consultant position in NYC. When I heard back from them, they told me that the knowledge gap between what I knew and what they needed me to know was too big and I might have been a better fit if I had 6 months of experience. This was the first interview that I went on since graduating college. before the interview, I read a book on visual C#. Turns out it wasn't a very good book and I was missing a lot of key areas of knowledge such as ADO.net SQL (I had learned some LINQ) A little bit about how memory is handled Multiple threaded programming, etc. Because the book wasn't very good, the stuff I did know, I didn't know very well. I felt crushed. I've applied for jobs to gain experience but when recruiters hear that I have no experience they lose interest. I figured that I can at least work on my knowledge. Since then, I read "SQL Essentials" to cover the SQL bit and I found a pretty awesome book that is good enough to clear up what's hazy in my mind and covers almost all of the extra topics. The book is "C# 4.0: The Complete Reference" by Herbert Schildt. I'm even learning a lot about the topics I was familiar with. For a month now I've been working my way through this beast of a book. However, gaining the knowledge I need is taking too long. I can't hold off not having a full-time job much longer. I'm not stupid and I'm studying constantly pouring through the book, asking questions on stackoverflow, referencing the C# specification, etc. I have made great progress but there is just too much ground to cover. I'm on chapter 12 which is about a 3rd through the book. To get an idea of what I know vs don't know, the table of contents is on amazon: http://www.amazon.com/C-4-0-The-Complete-Reference/dp/007174116X How on earth can someone know enough to function as a programmer in the real world? Can I try for a job in academia? Will I have time to finish learning the rest of the C# language or am I just un-hireable?

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  • Office Cleaning Business Websites

    Office cleaning businesses can benefit immensely from having a website for existing customers to reference and as a marketing tool for bringing in new customers. In this article we examine some of features that go into creating an effective website for an office cleaning business.

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  • What's wrong with this answer? [migrated]

    - by MikeLJ
    I wrote an answer to this question, but I can't post it even though it's not opinion based. which tile size to choice for 16-bits What's wrong with my answer? The Answer: I'll use these classic 16-bit consoles as reference: http://en.wikipedia.org/wiki/History_of_video_game_consoles_(fourth_generation) Super Nintendo: Max Resolution: 512x478 Sprites On Screen: 128 Max Sprite Size: 8×8. TurboGrafx-16: Max Resolution: 565x242 "Normal" resolution: 256×239 Sprites On Screen: 64 Max Sprite Sizes: 32×64 Neo Geo: Display resolution: 320×224 "Normal" Resolution: 304x224 Sprites on screen: 380 Max Sprite Size: 16x512

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  • What's the difference between these design pattern books? [on hold]

    - by BSara
    I'm currently looking for a good reference/guide for design patterns and in my search I've found the following three books highly recommended: Design Patterns: Elements of Reusable Object-Oriented Software Pattern Hatching: Design Patterns Applied Design Patterns Explained: A New Perspective on Object-Oriented Design I can't decide which book (if any) to purchase. So, my question is this: What are the fundamental differences between these books?

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