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  • What is the difference from the push and pull development models?

    - by michelpm
    I was reading Extreme Programming Explained, Second Edition and in the chapter 11 "The Theory of Constraints" the authors talk about the old and obsolete "push" development model and the XP way, the "pull" development model. It looks like a quite important concept, but it takes only a very small paragraph and two images that are mere illustrations of the "waterfall" and iterative process, nothing specific about these models except by the image caption. I searched and it doesn't go any further about it in the rest of the book. I couldn't find any further explanations or discussions about it in the Internet either. If the only difference about those is that one is "waterfall" and the other is iterative, them why push and why pull? Does anyone understand what is really the difference between those two and give some good examples?

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  • Cross-platform & 3D mobile game development [on hold]

    - by Sylvia MBemba
    I am not a developer or programmer and, I am planning an educative project that will involve having students to develop a cross-platform, 3D mobile game, similar to the SimCity concept. I need to write a project requirement and I'd like to pick someone's brain to understand what's involved in developing such a project: Is it realistic to have one or two students to do it? and along their other modules at uni? How much time can it take to develop from scratch? what are the different skills required?

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  • Testifying that somaxconn change can make a difference

    - by petermolnar
    I got into an argument on the net.core.somaxconn parameter: I was told that it will not make any difference if we change the default 128. I believed this might be enough proof: "If the backlog argument is greater than the value in /proc/sys/net/core/somaxconn, then it is silently truncated to that value" http://linux.die.net/man/2/listen but it's not. So does anyone know a method to testify this with two machines, one running, for example MySQL or LVS and the other is hammering it in a GBit network? I'm opened to any solution, scripts are slightly more welcome.

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  • Check SSD stability before returning it as broken?

    - by data_jepp
    I have the Transcend SSD 720 256GB 2,5" 7mm disk. And randomly I get disk IO in utorrent and large files copying to external will fail. I have removed it from my laptop since I need max stability. I use my laptop on exams. How can I really bench/make-it-sweat whilst connected to my desktop? I want to re-create some of the fails as I need proof if I am to return it. Firmware is updated. BIOS on laptop is updated. I could just completely nul the disk and then check for bad sectors, but is there anything else I could use for testing? Edit: It has 7 bad sector replacement operations. What does it mean?

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  • Do games use threads?

    - by Nubcake
    I understand that the concept of how a game runs i.e while (game_loop = true) { //handle events // input/output/sound etc } But it has come to my attention while programming in another HLL is do some games use threads for certain operations? For example take any Pokemon game ; during interaction a textbox appears to display information. Now I've been trying to simulate that sort of textbox and the only way I could have got it to be exactly the same is by using a loop and yes once a loop is started there is no way to handle window events unless they are handled again inside the loop itself. I couldn't have used this loop inside a different thread other than the main one (due to a DirectX limitation) so the only option was to use it inside the main program thread. I was wondering if some games work like this ; do they only use the main program thread and handle events again if they're inside a loop? Edit: I forgot to mention this is about console games not PC games! Thanks Nubcake

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  • Setting up IIS 7.5 for AD Client Certificates for iOS devices

    - by vonsch
    I am working on getting an iPad to auth to an IIS7.5 website using a local certificate mapped to a user in AD. I am not, in any sense of the word, an IIS admin. I essentially need to setup a proof of concept. I believe that this may work, but I just have no idea how to do it. What I have so far is an iPad with a user certificate installed. I have this user certificate added the correlating user account in AD. What I would like is a basic text webpage to load showing the user that it is authenticating. I would like this page to not be viewable unless it is client certificate authenticated. I don't mind doing the legwork, but I really don't know where to begin on the IIS side. Can anyone point me in the right direction?

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  • create new subdomain or buy new domain? seo costs [closed]

    - by greek_no_money
    If I am targeting the same audience, but the new sub-site has different concept from the existing site, should I create a new sub-domain or create a new domain? What are the seo advantages and disadvantages of creating a new sub-domain? For example Stack Exchange with Alexa rank 1.474 right now, has sub-domains such as programmers.stackexchange.com and other domains such us serverfault.com with rank 3.515 and stackoverflow.com with rank 109. So why didn't Stack Exchange put, for example, Stack Overflow in a sub-domain to create a better ranking?

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  • Relationship between databases [closed]

    - by user1525474
    Hi I am getting ready to create my first web aplication.I have some knowledge of databases but I have never used databases with relationship created beetween them and also I am not sure how to acces the data in the relationship.My experience is limited to basic CRUD applications and working on simple tables with no realtionship using PHP and MySql. For example I will be creating a login system and for each user I would like to create a profile page that store different data(name , address , profile image etc.).Some of the info will be the same in both tables so there is no point in creating the same table twice. What I would like is if anyone can tell of some tutorials so I can better understand the concept?

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  • Using multiple servers for hosting [on hold]

    - by foo
    I need help understanding the concept of using multiple servers (for hosting at home). More specifically multiple WAMP servers. (I have tried looking online but have found no good resources, maybe i am searching for for the wrong things to answer my questions) Questions -How do multiple servers work together? -Do they all have their independent hard drives storing different information? and if so, does the server dynamically locate files? -How do shell commands get executed? -How do they share the "load"? i.e. processing power, resources? Please tag links to resources so i may use a reference. Cheers!

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  • SPARC SuperCluster T4-4 ????!

    - by user12798668
    SPARC SuperCluster T4-4 ???? Oracle Solution Center Tokyo ???????!?????????? Pillar Axiom 600 ????????????????? ?????????? SPARC SuperCluster T4-4 ???????????????? Oracle Solution Center Tokyo ???????????????????... ????????????????? ?? SPARC SuperCluster T4-4 ????? POC (Proof of Concept) ????????????????????????????????!?????? SPARC SuperCluster T4-4 ???????????????????????? blog ??????...?? 4?4???????? Oracle OpenWorld Tokyo 2012 ????????? 4/5(?) ????????? G2-01 ???????&???????????IT???????????(11:50 - 13:20)@???????? 4/5(?) S2-42 ???UNIX?????????? - SPARC SuperCluster? (16:30 - 17:15)@??????????? 4/5(?) S2-53 ?Oracle E-Business Suite?????????????????? ??/??????????????????????”SPARC SuperCluster”?(17:40 - 18:25)@??????????? ?????????????????????????????????????????????! EXHIBITION HALL(????)(11:15-18:00)@??????????? http://www.oracle.com/openworld/jp-ja/exhibit/index.html ???????????!! Oracle OpenWorld Tokyo 2012 ???? URL http://www.oracle.com/openworld/jp-ja/index.html ?????? 7264 ???????????????

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  • [NSCustomView isOpaque]: message sent to deallocated instance 0x123456

    - by JxXx
    Hi all I receive that message in debugger console since I added the following arguments for debugging my application with XCode. NSZombieEnabled: YES NSZombieLevel: 16 I was looking for zombie objects... Before doing so, the application failed before I could know where what and why was happening.... Now I´m pretty sure that 'something' outside code is trying to access an object previously released and I can't know where or why it happens neither where it was released... My application is based on this proof of concept (very interesting and colorful) of QuartzCore Framework: http://www.cimgf.com/2008/03/03/core-animation-tutorial-wizard-dialog-with-transitions/ Based on it, I added a few more nsviews to my project and a title and an index to each one, also I added some buttons, text and images depending on what 'dialog' (ACLinkedView object) it was... The transition from an ACLinkedView object to another is going through a validation that depends on the view where you are ... As you see I used this proof of concept as the foundation of my application and it grew and grew into an application that makes use of configuration files, web services (using gSOAP and C ...) I hope you can give me some clues to where is my error ... I´ve been the hole week debugging unsuccessfully, as I said before, I think that that message comes from a point outside my code. I'd say that the problem s related with bad memory allocation or automatisms (nearly completely unknowns for me) during loading the nib components... I will try to explain all this with parts of mycode. This is my ACLinkedView definition: #import <Cocoa/Cocoa.h> @interface ACLinkedView : NSView { // The Window (to close it if needed) IBOutlet NSWindow *mainWindow; // Linked Views IBOutlet ACLinkedView *previousView; IBOutlet ACLinkedView *nextView; // Buttons IBOutlet NSButton *previousButton; IBOutlet NSButton *nextButton; IBOutlet NSButton *helpButton; //It has to be a Button!! IBOutlet NSImageView *bannerImg; NSString *sName; int iPosition; } - (void) SetName: (NSString*) Name; - (void) SetPosition: (int) Position; - (NSString*) GetName; - (int) GetPosition; - (void) windowWillClose:(NSNotification*)aNotification; @property (retain) NSWindow *mainWindow; @property (retain) ACLinkedView *previousView, *nextView; @property (retain) NSButton *previousButton, *nextButton, *helpButton; @property (retain) NSImageView *bannerImg; @property (retain) NSString *sName; @end The ACLinkedView's AwakeFromNib is this: #import <Cocoa/Cocoa.h> @interface ACLinkedView : NSView { // The Window (to close it if needed) IBOutlet NSWindow *mainWindow; // Linked Views IBOutlet ACLinkedView *previousView; IBOutlet ACLinkedView *nextView; // Buttons IBOutlet NSButton *previousButton; IBOutlet NSButton *nextButton; IBOutlet NSButton *helpButton; //It has to be a Button!! IBOutlet NSImageView *bannerImg; NSString *sName; int iPosition; } - (void) SetName: (NSString*) Name; - (void) SetPosition: (int) Position; - (NSString*) GetName; - (int) GetPosition; - (void) windowWillClose:(NSNotification*)aNotification; @property (retain) NSWindow *mainWindow; @property (retain) ACLinkedView *previousView, *nextView; @property (retain) NSButton *previousButton, *nextButton, *helpButton; @property (retain) NSImageView *bannerImg; @property (retain) NSString *sName; @end (As you can see the initialization of each ACLinkedView object depends on it's position wich is seted up into the Interface Builder by linking actions, buttons and CustomViews... Does I explain enough? Do you think that I should put more of my code here, i.e. AppDelegate definition or it´s awakeFromNib method? Can you help me in any way? Thanks in advance. Juan

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  • Creating WCF Services using Dynamic Languages and DLR

    - by Perpetualcoder
    I was curious how anyone would go about creating WCF based services using a dynamic language like IronPython or IronRuby. These languages do not have the concept of interfaces. How would someone define service contracts? Would we need to rely on static languages for such kind of tasks? I am a big fan of Python in particular and would like to know if this can be done at this point.

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  • Subquery using derived table in Hibernate HQL

    - by Vladimir
    I have a Hibernate HQL question. I'd like to write a subquery as a derived table (for performance reasons). Is it possible to do that in HQL? Example: FROM Customer WHERE country.id in (SELECT id FROM (SELECT id FROM Country where type='GREEN') derivedTable) (btw, this is just a sample query so don't give advices on rewriting it, is just the derived table concept I'm interested in) Thanks.

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  • Secure Delete PCI-DSS Windows Environment

    - by Brennan Mann
    Hello, I have been reviewing a number of applications for securing deleting files. I understand the concepts of overwriting the file several times with zeros and random characters; however, I don't understand the concept of renaming the file up to thirty times before actually deleting the file. Any feedback would greatly be appreciated. I am currently working on a PCI DSS project. URL - SDELETE by Sysinternals http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx Thanks, Brennan

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  • Fluent Nhibernate - Mapping two entities to same table

    - by Andy
    Hi, I'm trying to map two domain entities to the same table. We're doing a smart entity for our domain model, so we have the concept of an Editable Address and a readonly Address. I have both mapped using Classmaps, and everything seems to go fine until we try to export the schema using the SchemaExport class from NHibernate. It errors out saying the table already exists. I assume it's something simple that I'm just not seeing. Any ideas? Thanks

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  • Sales Career in Cloud Computing

    - by ricky
    I am working with a Google's business partner and selling Google Apps which is based on cloud computing concept. As we all know cloud computing is ready to capture the IT world, So I just wanted to take suggestion from you experts here about the sales career in Cloud computing I am a Post graduate in Sales and Marketing and planning to dig deeper into Cloud computing from sales point of view. I would appreciate if you can assist me with my path creation to achieve good career in cloud computing. Regards, Jason Robb

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  • pitfalls/disadvantages of functional programming

    - by CrazyJugglerDrummer
    When would you NOT want to use functional programming? What is it not so good at? I am more looking for disadvantages of the paradigm as a whole, not things like "not widely used", or "no good debugger available". Those answers may be correct as of now, but they deal with FP being a new concept (an unavoidable issue) and not any inherent qualities. Related: pitfalls of object oriented programming advantages of functional programming

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  • UIView's frame, bounds, center, origin, when to use what?

    - by Boon
    UIView has the concept of frame, bounds, center, and origin, and they all seem to be interrelated. Most of the time, I deal with frame when setting the position and size of a UIView (or subclass). I understand that the frame is using global coordinate system and the bounds is using coordinate of the local view (therefore it's x and y are 0, but not always), but it's still confusing to me when to use what. Question: Under what context (and what's the right time) the other properties (bounds, center, origin) should be used?

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  • C# 4: Real-World Example of Dynamic Types

    - by routeNpingme
    I think I have my brain halfway wrapped around the Dynamic Types concept in C# 4, but can't for the life of me figure out a scenario where I'd actually want to use it. I'm sure there are many, but I'm just having trouble making the connection as to how I could engineer a solution that is better solved with dynamics as opposed to interfaces, dependency injection, etc. So, what's a real-world application scenario where dynamic type usage is appropriate?

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  • ASP.NET MVC Routing Via Method Attributes

    - by TorgoGuy
    In the StackOverflow Podcast #54, Jeff mentions they register their URL routes in the StackOverflow codebase via an attribute above the method that handles the route. Sounds like a good concept (with the caveat that Phil Haack brought up regarding route priorities). Could someone provide some sample to to make this happen? Also, any "best practices" for using this style of routing?

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  • (RAD Studio) Virtual TreeView: how to initialize all nodes at once?

    - by Andrew
    Hi, I just discovered this component and started working with it. I understand that the whole concept of it is to initialize nodes on the go as they are needed but I need all of them to initialize instantly. What is the smart way to do it? The only thing I came up with is to use GetLast() after adding nodes. I believe, there is a better way, or not?

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