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• Why can operator-> be overloaded manually?

  - by FredOverflow

  Wouldn't it make sense if p->m was just syntactic sugar for (*p).m? Essentially, every operator-> that I have ever written could have been implemented as follows: Foo::Foo* operator->() { return &**this; } Is there any case where I would want p->m to mean something else than (*p).m?

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• Instantiating and referencing models in MVC

  - by fig-gnuton

  In MVC, should each model be a globally accessible singleton accessible to any view/controller? Or should the models be singletons that are dependency injected into any component that requires them? Or should a new model instance be created for each component that needs one, in which case events would be used to propagate changes across model instances of the same class?

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• Is it possible to determine whose code (according to `git blame`) was affected by each hunk output by `git diff`?

  - by Ben

  I have a large cross-cutting commit that I would like to split up according to the authors whose code was affected, both to increase the reviewers' familiarity with the code they're reviewing, and to divide the review burden equitably. I realize that the blame may be mixed within a given hunk, in which case it would be nice to either collect multiple reviewers or just choose the most "blameworthy" one (breaking ties arbitrarily is fine).

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• Would showing primary key to the public be potential security risk?

  - by Bilzac

  Well the question is self-explanatory. One more thing would be, if it is a security risk then please provide an example of what the user could do. In this case the primary key would be something like : "Product ID" Thanks!

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• Android moving back to first activity on button click

  - by cppdev

  I am writing a application where I am dealing with 4 activities, let's say A, B, C & D. Activity A invokes B, B invokes C, C invokes D. On each of the activity, I have a button called "home" button. When user clicks on home button in any of the B, C, D activities, application should go back to A activity screen ? How to simulate "home" button in this case ?

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• How to implement a login page in a GWT app?

  - by Gatis

  My WebApp needs to authenticate user before allowing any sort of access. The scenario I'm trying to implement is a login page with username and password fields. Once user hits "send" button, a sign like "Verifing..." should be shown up while an RPC call verifies credentials. In case of success, load the main app screen. What is the best way to implement that?

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• Getting indices of most recent set of numbers in an array in Matlab?

  - by user2539781

  Let's say I have an array in Matlab: x = [1 1 1 2 2 2 3 3 3 3 2 2 3 3 3 1 1 1 1 1 2 2 2 2 3 3 3] I want the indices of the most recent set of consecutive '1's. In this case, I want the answer: answer = [16 17 18 19 20] % (which should correspond to the last sequence of 1's) I need an automated way to do this in Matlab, that will work with any size arrays, always giving me the indices for the last set of consecutive 1s. Any suggestions?

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• Implementing a kext that intercepts file system usage.

  - by UraN

  Hi, how do most of antivirus software block file system io in case of an infected file? I suppose all the magic resides in some custom kext to do that. Can anyone point me to some topics on this? Some working example would also be great. I've read apple docs about kext development, but mostly it's all about hardware drivers and i could not find what i need. Thanx.

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• can you use jquery datepickers renderCalendar with the multimonth plugin

  - by oo

  using jquery date picker you can render specific cells the way you want. (in my case i have a list of dates that i want to highlight as they are important days) i see that datepicker itself supports this here: http://www.kelvinluck.com/assets/jquery/datePicker/v2/demo/renderCalendarCallback.html but i dont see the multimonth implementation having an option for renderingcustomDates http://www.kelvinluck.com/assets/jquery/datePicker/v2/demo/datePickerMultiMonth3.html was this missed out in the implementation to expose this functionality?

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• Paging in my web page

  - by Jibu P C_Adoor

  Hi, I have a large data set and i have to apply paging on that data set and after that the result set should be another data set. What is the reliable method to achieve that. I have tried with 'PagedDataSource' class but i don't know how it is possible to convert to dataset or data table. In my case i need a general solution. I have to bind to a control like gridview as well as i have to used it with normal html table.

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• How to make nested child forms in C#.net

  - by abu

  In my windows form application I am using 10 forms.It is fine when only a parent and single child form are used at a time. But in case of multiple use of child form I am getting problem and not able to use them as child forms.They are not working as child form. Your any effort would be helpful for me. Thanking You In Advance

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• What is the point of function pointers?

  - by gramm

  Hi, I have trouble seing the utility of the function pointers. I guess it may be useful in some cases (they exist, after all), but I can't think of a case where it's better or unavoidable to use a function pointer. Could you give some example of good use of function pointers (in C or C++)? Many thanks :)

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• Exclude specific filename from shell globbing

  - by Alsciende

  Hi, I want to excluse a specific filename (say, fubar.log) from a shell (bash) globbing string, *.log. Nothing of what I tried seems to work, because globbing doesn't use the standard RE set. Test case : the directory contains fubar.log fubaz.log barbaz.log text.txt and only fubaz.log barbaz.log must be expanded by the glob.

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• tor api in own project

  - by Ockonal

  Hello, I'm going to develop gui-based application for tor controlling (like vidalia or torK). Are there any libraries for using tor? I don't want to parse each byte of information from sockets. My program should display branches of computers, use chosen as traffic-provider etc. What I need in my case? Are there any small and simple samples (for example open-source projects) to do this.

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• Rescuing redirect :back after destroy in Rails?

  - by Andreas

  I'm looking for a best practice solution to be able to keep using redirect :back after a successful destroy action, as many items can be deleted from a variety of listings. Unfortunately that strategy fails for the one case when the delete is initiated from the item view itself. What approach do you recommend for this situation?

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• How do I declare a constructor for an 'object' class type in Scala? I.e., a one time operation for the singleton.

  - by Zack

  I know that objects are treated pretty much like singletons in scala. However, I have been unable to find an elegant way to specify default behavior on initial instantiation. I can accomplish this by just putting code into the body of the object declaration but this seems overly hacky. Using an apply doesn't really work because it can be called multiple times and doesn't really make sense for this use case. Any ideas on how to do this?

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• VB.net SyncLock Object

  - by Budius

  I always seen on SyncLock examples people using Private Lock1 As New Object ' declaration SyncLock Lock1 ' usage but why? In my specific case I'm locking a Queue to avoid problems on mult-threading Enqueueing and Dequeueing my data. Can I lock the Queue object itself, like this? Private cmdQueue As New Queue(Of QueueItem) ' declaration SyncLock cmdQueue ' usage Any help appreciated. Thanks.

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• Is deriving square from rectangle a violation of Liskov's Substitution Principle?

  - by somaraj

  I am new to design and learning the design principles. It says deriving square from rectangle is a classic example of violation of Liskov's Substitution Principle. If that's the case, what should be the correct design?

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• Task Manager with Trac support for Mac

  - by Dmitry

  Found Mylyn as a very good task manager that supports Trac and Gmail Task. I've seen Tasktop, but looking for something with smaller memory footprint that I could always run in background. Is there any lighter client (not on Eclipse platform) to manager at least Trac tasks (via XML-RPC) and in best case scenario with GMail Tasks support?

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• When to use dictionaries?

  - by RHaguiuda

  I`m not really sure when I should use a dictionary in my applications. Everytime I code a switch case that returns a single value, for example, should I strive for a dic? Thanks

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• I want to be able to use .toggle() but binded to the keydown element - jQuery

  - by DanC

  I've seen thejQElement.toggle(fn1, fn2, fn3, fn4) would do the trick in case I wanted to click the element. I want it to sequencially fire the events on the tab keydown event. Thanks

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• Recommended book for Sql Server query optimisation

  - by Patrick Honorez

  Even if I have made a certification exam on Sql Server Design and implementation , I have no clue about how to trace/debug/optimise performance in Sql Sever. Now the database I built is really business critical, and getting big, so it is time for me to dig into optimisation, specially regarding when/where to add indexes. Can you recommend a good book on this subject ? (smaller is better :) Just in case: I am using Sql Server 2008. Thanks

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• Django: auto minifying css/js files before release

  - by Dzida

  Hi, I have following case: I want to use uncompressed js/css files during development (to debug js for example) but on production I want to switch automatically to minified versions of that files. some simple solution is to put in your template: <script src="some_js.{% if not debug %}min.{% endif %}js".... but this require manully providing that such file exist and to do minifaction manullay after original file change. How do you accomplish this in your projects? Is there any tool for this?

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• Create Hidden Windows file/folder from Linux

  - by what4893

  Is it possible to create a file on a mounted SMB share that is hidden from Windows? The .(dot) prefix doesn't work in this case because that only works on Linux. Basically I'm looking for the same affect as using attrib +h on Windows, but under Linux.

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• What does the length attribute do when set on the @Column JPA annontation?

  - by James McMahon

  What exactly does setting the length on a column do in JPA? @Column(name = "middle_name", nullable = false, length = 32) public String getMiddleName() { return this.middleName; } I understand that you can use the annotations to generate the database schema based on the entity objects, but does length do any sort of check or truncation when persistence happens, or it solely used for schema creation? I also realize that JPA can sit on top of various implementations, the implementation I am concerned with in this case, is Hibernate.

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