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• Security Resources Defining, Static/Dynamic

  - by mmontalvo

  I am implementing a simple(hopefully) security manager within an application. Is it better to have predefined(static) roles, custom roles(dynamic)? I am leaning more towards dynamic groups or roles only because then it would not require a redeploy to update the system. Also, what would be the best approach to define resources in general? The application has a database that can hold either the static or dynamic values.

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• Support for IMAP IDLE in ruby

  - by Asaxena

  Ok, I have been suck on it for hours. I thought net/imap.rb with ruby 1.9 supported the idle command, but not yet. Can anyone help me in implementing that? From here, I though this would work: class Net::IMAP def idle cmd = "IDLE" synchronize do tag = generate_tag put_string(tag + " " + cmd) put_string(CRLF) end end def done cmd = "DONE" synchronize do put_string(cmd) put_string(CRLF) end end end But imap.idle with that just return nil.

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• iphone coredata removing records between two entities connected by relation ship

  - by satyam

  I'm implementing core data in my iphone app. It has two entities. Entity1: LatestData Entity2: LatestDetailedData LatestData has URL, publishedDate, heading LatestDetailedData has URL, NewsDescription, PublishedDate, Author Both entities have same URL for a record. Both the entities are connected with inverse relation ship. And the relation ship is "delete-Cascaded" What I want: If I remove a record in LatestData, I want the record with same URL in LatestDetailedData must also be deleted. How?

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• .net - invoke methods from classes from a certain namespace via reflection

  - by Kristian Hildebrandt

  SPL and PHP allows you to create objects on the fly from classes, that fulfill certain conditions, such as implementing certain interfaces and stuff like that. However, I would like to do something similar in c# and automatically create objects from all classes in a namespace and invoke a particular method from those classes that implement a certain interface. My experience developing desktop apps is very limited. I am not quite sure if I should use delegates to archive this or if reflection is really the way to go.

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• Interface explosion problem

  - by Benny

  I am implementing a screen using MVP pattern, with more feature added to the screen, I am adding more and more methods to the IScreen/IPresenter interface, hence, the IScreen/IPresenter interface is becoming bigger and bigger, what should I do to cope with this situation?

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• How to make a webpage display differently in different browsers?

  - by Karthik

  I want to display the contents of a web page in a different format in different browsers. How to go about implementing it?

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• Preventing threads from writing to the same file

  - by EpsilonVector

  I'm implementing an FTP-like protocol in Linux kernel 2.4 (homework), and I was under the impression that if a file is open for writing any subsequent attempt to open it by another thread should fail, until I actually tried it and discovered it goes through. How do I prevent this from happening? PS: I'm using open() to open the file.

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• Image animation over CGContextDrawPDFPage

  - by BittenApple

  I have a pdf page displayed with CGContextDrawPDFPage. I want to keep this page shown and have an image slide in from top over this page, just as it can be seen in the iBooks application. It's a book, the sliding image is a bookmark that slides in when you are about to close the book. What is the best way to go about implementing this?

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• Undo implementation - DOM manipulations

  - by sonofdelphi

  Is there a library that can be used for implementing undo/redo functionality for DOM element manipulations in JavaScript? I'm writing an app that moves around DOM elements, enables editing and deletion of those elements. There are event-handlers and other objects associated with each element operated upon. Not sure whether I need to roll my own implementation of the Command pattern for this. Surely, there must be something available? If not, suggestions and pointers would be a great help.

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• ASP.NET MVC: How to create a basic Pseudo Viewstate? Or better solution?

  - by Mark Redman

  I am newish to MVC and understand all the great things about it, including the reasons why voewstate isnt available, however there are some circumstances where I think having some kind of view state will be quite handy, In my case I am thinking about list pages with various search filters that can be applied to the list. Would it be worthwhile implementing some kind of pseudo viewstate to hold this info in some cases? or is there a better solution? Any examples out there? Your comments appreciated.

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• What kinds of strategies are their for paging result sets for web UIs?

  - by predhme

  I am looking at implementing a paging strategy for a domain model who's numbers are in the hundreds of thousands. I am most interested in how websites that are performance conscience achieve this.

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• Programmatically refresh Windows Explorer (not IE) window

  - by awj

  I'm using a Windows Service to do some directory cleaning (implementing a FileSystemWatcher). The problem I'm having is that sometimes, when several files in a directory are deleted, one of the files still shows in the Explorer window. If you refresh the window the file disappears. Similarly, if you right-click on it or try to copy it, a pop-up informs that it no longer exists. So what I'd like to know is: is there any way I can programmatically refresh the view of the Explorer window?

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• Any way to anticipate session timeout ?

  - by Tom

  Hi, Is there a way to "catch" the session timeout event, so as to retrieve data from HttpSession before its invalidated ? We're implementing the Filter Interface, and in the doFilter method, the user we stored in the session object at login is null when session times out. Thanks in advance.

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• Determining the order of DOM elements

  - by sonofdelphi

  Given two DOM elements, say a and b, how can we determine which comes first in the document? I'm implementing drag and drop for a set of elements. And the elements can be selected in any order, but when they are dragged, these elements need to be moved in the "correct" order.

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• Joomla: comments for own componet

  - by vitperov

  I have written my own Jommla component for displaying particular information (for example car info: engine power, year and etc.). Now I want to add a comments to my component. Implementing comments by my own is too hard and it's not very safe. Maybe someone had and experience integrating some existing joomla component for an own component? Update: Maybe I can copy-paste code of some existing joomla comments component in my own component? Does somebody tried to do this?

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• How can I know when QProcess wants to read input?

  - by mpcabd

  I'm implementing a compiler in my Compilers class, I'm using Qt & C++. After I have generated the machine code from the source code, I'm executing the virtual machine that will execute the call. I'm facing a problem here, I'm using readyRead() signal to get output from the virtual machine, but how can I know that the virtual machine wants to read data from the user? I wanna show the user an input dialog each time the machine asks for input.

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• Data Structure Used For SMS Messages In Android

  - by Greenhouse Gases

  Does anybody know what data structures are used to the store messages in an SMS client app, and whether there is an existing API for this. I was perhaps looking at implementing a link list for the purpose but if the work has already been done in an API then perhaps it would be unnecessary to commit time to the task that could be spent programming other parts. Many thanks

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• Why abstract classes necessary?

  - by bala3569

  1.What is the point of creating a class that can't be instantiated? Most commonly to serve as a base-class or interface (some languages have a separate interface construct, some don't) - it doesn't know the implementation (that is to be provided by the subclasses / implementing classes) 2.Why would anybody want such a class? For abstraction and re-use 3.What is the situation in which abstract classes become NECESSARY?can anyone brief it with an example?

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• If I never ever use HashSet, should I still implement GetHashCode?

  - by Dimitri C.

  I never need to store objects in a hash table. The reason is twofold: coming up with a good hash function is difficult and error prone. an AVL tree is almost always fast enough, and it merely requires a strict order predicate, which is much easier to implement. The Equals() operation on the other hand is a very frequently used function. Therefore I wonder whether it is necessary to implement GetHashCode (which I never need) when implementing the Equals function (which I often need)?

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• MySQL: what data type to use for hashed password field and what length?

  - by z-boss

  I'm not sure how password hashing works (will be implementing it later), but need to create database schema now. I'm thinking of limiting passwords to 4-20 characters, but as I understand after encrypting hash string will be of different length. So, how to store these passwords in the database?

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• Implement sms scheme function in iPhone apps

  - by elson

  hi, is there any code on how to implement the sms scheme in iPhone apps. in addition, implementing this sms scheme will allow my apps interact with the sms apps ma like doing subscription of advertisement or services ? any help, i truly appreciated it. Cheers

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• JDBC resulset total rows

  - by Zeeshan

  I am implementing Paging in my application. For this i run a query and get a resultset. Now i want to get total no of records in this resultset for my paging calculation. How can i get ? i dont want to execute a extra sql which gives me total rows

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• Is it good to use Jquery UI themes in a big high traffic website?

  - by Amr ElGarhy

  Is it a good way to use JQuery UI themes while implementing a high traffic website. Is it easy to edit and customize a little based on my website needs? Does it has any famous problems? want to hear your ideas about it and is it safe to use or its better to write all my CSS from scratch. Note that i checked the themes there and found there nice and some of them after some edits will fit the design we have.

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• Cascading dropdownlists in browser-enabled form

  - by Nomz

  Im trying to fill a dropdownlist based on an other one: Departments and SubDepartments. i followed this link: http://www.sharepoint-tips.com/2007/01/infopath-form-services-implementing.html when i try to fill in a form it gives me an error: Request Failed (-- securityException) on this line: q.FileLocation = q.FileLocation + "&FilterField1=Department&FilterValue1=" + GetDepartmentValue(); and the second dropdownlist (subdepartments) is not filtered. Any idea what might be the problem?

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• Update working on target repo when changes are pushed to it

  - by Francis

  I'm implementing GIT for web developemnt, and I want to have the working copy repository that everybody pushes to automatically reflect the latest commit in it (since it is online for everyone on the team to see as a testing site). Right now, you have to run "git reset --hard HEAD" on the repository after somebody pushes to it in order to be up to date.

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