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  • nonatomic property in model class when using NSOperationQueue (iPhone)?

    - by Andrew B.
    I have a custom model class with an NSMutableData ivar that will be accessed by custom NSOperation subclasses (using an NSOperationQueue). I think I can guarantee thread-safe access to the ivar from multiple NSOperations by using dependencies, and I can guarantee that I don't access the ivar from other code (say my main app thread) by waiting until the Q has finished all operations. Should I use a nonatomic property specification, or leave it atomic? Is there a significant impact on performance?

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  • Screen lock customization for android

    - by deaviator
    Hi frens I'm planning to explore the possibilities on how to make a screen lock better (like pattern based). It will be great help if someone points out the difficulty level or where to actually start digging. This is going to be my project idea for minor research paper. What do u guys think or if anyone has more ideas worth exploring, I would like to consider it. reagrds

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  • Is Cassandra database row size limited by available memory?

    - by Adam Hollidge
    I'm working with very long time series -- hundreds of millions of data points in one series -- and am considering Cassandra as a data store. In this question, one of the Cassandra committers (the über helpful jbellis) says that Cassandra rows can be very large, and that column slicing operations are faster than row slices, hence my question: Is the row size still limited by available memory?

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  • Best programming language for teaching econometrics?

    - by TJB
    I will be teaching an econometrics course to masters students in the fall. I think it is important for them to learn programming with data as an essential applied research skill. What suggestions do you have for the programming language. I am leaning mostly towards R. What others should I consider?

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  • Opinions on commercial MVC controls

    - by Mark
    We are interested in the communities opinions on commercial MVC controls ie Telerik, Syncfusion. Which is fast, easy to use, stability, documentation, support and all that good stuff. We are about to start our second MVC project and are currently doing research into improving functionality and speed of development to 'standard' MVC. Any of your thoughts are much appreciated...

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  • When a tech document states that something is IP-Aware was does that specifically mean?

    - by Mike
    I need a class room definition for IP-aware for a research assignment. I.E. something that would be used, lets say, in a dictionary. Does anyone know or provide me with a link to a defintiion, I am having no luck with searches. Are IP-Aware devices only devices that can read/find/make decisions based on IP addresses. For example a router would be one, but a network printer would not?

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  • Automated incremental backups from Plesk on Centos to Amazon S3

    - by ChrisS
    Hi, I've done a far bit of research on this via Google and there seems to be quite a few ways of possibly doing this. I'm looking to incrementally backup new and updated files in two directories on my Plesk run Centos 5.2 server: /backups and /var/www/vhosts (preferable only httdocs within each vhost) Has anyone got some great feedback from using the various solutions - seems to be various Java, Perl and Ruby based solutions out there. Many thanks, Chris

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  • Delay in the implementation of text change in Statusbar control

    - by ehsan zeynali
    I have a function a time consuming operation that is done I want to start and end operations appear to be user (By statusbar control) But when performed function, both text executed at the end of function. (user can not sees "Start Operation ...") What solution do you recommend to me? private void btnUpdateDataBase_Click(object sender, RoutedEventArgs e) { TextBlockStatus.Text = "Start Operation ..."; //Time consuming operation TextBlockStatus.Text = "End Operation ..."; }

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  • How do you label output variables in an IDL FOR loop for further processing outside the loop in the same program?

    - by user610769
    I have a FOR loop like this: FOR k = 1,216 DO atom = G[,0::(215+k)] END What I would like to be able to do is to store in memory the array for each atom, say, atom_k and then call these different variables to perform further operations outside the FOR loop. Conceptually, I want to label the "atom" variable with the "k" counter somewhat like this: FOR k = 1,216 DO atom(k) = G[,0::(215+k)] END Of course, this doesn't work because "k" is no longer a label in this case. Does anyone know?

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  • Methods for implementing and using graphs of nodes in C++?

    - by DistortedLojik
    I am working on a research project that deals with social networks. I have done most of the backbone of the program in C++ and am now wanting to implement a way to create the graph of nodes and the connections as well as a way to visualize the connections between people. I have looked a little into Lemon and the Boost graph library, but was wondering which one would be easier to learn and implement or if I should just code my own.

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  • Sharing code between Android and Windows Mobile

    - by reuscam
    I'm doing some initial research on smart phone development, and I noticed that Android and Windows Mobile both support c++ for application development. I was curious if anyone had any experience trying to manage shared files between both Android and Windows Mobile, and to what extent that code can be shared? e.g. no user interface can be shared, but web service and business logic classes can be shared, etc.

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  • How does IE8 handle xml header.

    - by markovuksanovic
    I was wondering where I can find some information how IE8 actually handles xml header... for example how is handling <?xml version="1.0" encoding="utf-8"?> different to <?xml version="1.0"?>. One other questions would be how FF handles those header. How is that different to IE8. I am almost 100% sure that they handle them differently but am still doing some research. /Marko

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  • Google App Engine - The most awaited feature

    - by systempuntoout
    This list is taken from the official Google App Engine roadmap: SSL for third-party domains Background servers capable of running for longer than 30s Ability to reserve instances to reduce application loading overhead Ability to select different availability vs. latency options for Datastore Support for mapping operations across datasets Datastore dump and restore facility Raise request/response size limits for some APIs Improved monitoring and alerting of application serving Support for Browser Push (Comet) communication Built-in support for OAuth & OpenID What is your most awaited feature and why?

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  • HTTPS and C++ - Not an easy match?

    - by Holli
    I need to access a HTTPS protected website (HTML or XML) from an C++ MFC application and I would like an easy solution. But I did a little research and it's seems to me HTTPS and C++ don't play nice and easy together. Is there any recommended class library for HTTPS web access? Should be easy to use and not too expensive.

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  • Robotium BDD with Cucumber

    - by LucasGomes
    I want to know if you guys know how to make BDD tests with Robotium. As I research Robotium works with a different Virtual Machine (Dalvik) so I cannot run as Junit Test (Only with Android Junit Test). So I found a possible solution to run Robotium with Junit with RoboRemote https://github.com/groupon/robo-remote. But when i tried to integrate with cucumber the tests became unstable. So you guys know some way to make BDD tests using Robotium?

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  • Knowing the type of the stored proc when invoking from C#

    - by dotnetdev
    I am making a windows service to be able to run operations on a sql server database (insert, edit, etc) and invoke Stored Procs. However, is there a way for me to know the type of the SP? When invoking from C#, I need to knof if it is returning 1 value, or more, or none (so I can use executereader, scalar, etc)? Thanks

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  • C++ code coverage tool

    - by prattipam
    I am looking for c++ code coverage tool which fares well in mutli server setup and on both windows and linux without licensing issues(if non free). I have done some research and found 2 free tools: Covtool and gcov. Any disadvantages on these or any other suggestions?

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  • MySQL: LOAD DATA reclaim disk space after delete

    - by Michael
    I have a DB schema composed of MYISAM tables, i am interested to delete old records from time to time from some of the tables. I know that delete does not reclaim the memory space, but as i found in a description of DELETE command, inserts may reuse the space deleted In MyISAM tables, deleted rows are maintained in a linked list and subsequent INSERT operations reuse old row positions. I am interested if LOAD DATA command also reuses the deleted space? UPDATE I am also interested how the index space reclaimed?

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  • How can I implement a 'select all' check-box on my CRM 4 custom form?

    - by Gryphoenix
    I am working on a custom CRM form with numerous checkboxes, organized by sections. I would like to implement a 'select all' feature to the form and am trying to understand how to format the JavaScript. My research thus far has pointed me to the possibility of using a FOR statement to iterate through all of the elements in the section I want to process, setting their values accordingly, but am unsure of which document.getElements ... method to utilize.

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