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  • subquery factoring questions.

    - by Sujee
    Hi, Please explain. a) is "subquery factoring" used to replace a non-correlated subquery? What about correlated subquery? b) if it is true, are "subquery" and "subquery factoring" executed exactly once? c) "subquery" vs "subquery factoring" which one is better Thank you.

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  • Is there a utility that can monitor open windows/ in .net winforms?

    - by Jules
    This is a general question, but I'll explain my specific need at the moment: I want to find the framework class that enables one to choose an image at design-time. I can find the editor that is used at run-time - its the Drawing.Design.ImageEditor. At design time, however, a different editor pops up which allows one to choose an image from resources. I'm guessing I could run some kind of program, then open up the image editor, from the property grid, and see what new windows/classes have been created? Thanks

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  • Explanation of this SQL sanitization code

    - by Derek
    I got this from for a login form tutorial: function clean($str) { $str = @trim($str); if(get_magic_quotes_gpc()) { $str = stripslashes($str); } return mysql_real_escape_string($str); } Could some one explain exactly what this does? I know that the 'clean' var is called up afterwards to sanitize the fields; I.e. $email = clean($_POST['email']);

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  • Prolog instantiation error?

    - by KP65
    Hello guys, I'm stuck with some sort of error which i don't really understand in prolog. I get this error when calling a rule(which seems to work sometimes?) : error(instantiation_error,Var0) Can anyone explain to me what this means? Thanks

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  • SharePoint Governance

    - by jobless-spt
    I have been search about SharePoint Governance for past few days, the more I search, more confused I am getting about this Topic. Could anyone just explain in brief? What you know about it or are you using/implementing it?

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  • Bitwise Operations -- Arithmetic Operations..

    - by RBA
    Hi, Can you please explain the below lines, with some good examples. A left arithmetic shift by n is equivalent to multiplying by 2n (provided the value does not overflow), while a right arithmetic shift by n of a two's complement value is equivalent to dividing by 2n(2 to the power n) and rounding toward negative infinity. If the binary number is treated as ones' complement, then the same right-shift operation results in division by 2n and rounding toward zero. Thankx..

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  • Git Cherry Pick dirty index

    - by Anantha Kumaran
    I have two branches master and exp i tried to cherry pick some of the commit in the exp to master.I am getting the following error. git cherry-pick 209c4b154d3c15fa8086d4cc15fa34e53b8a65a3 fatal: Dirty index: cannot cherry pick Can anyone explain this error.

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  • JSP/Servlet CRUD form with special input field based on join table relationship

    - by user1701467
    There's database with a bunch of tables that are joined with join tables. E.g. Members and Division are joined with MembersDivisions table. JSP/Servlet login functionality has been developed, but now the CRUD functionality needs to be implemented and I was unable to find any tutorials about it, especially involving the join table(when creating new division you can add members to it, or add more to the existing one). Maybe someone could, theoretically, explain how to do the Division part of the CRUD web form?

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  • why to use code generators

    - by Night Walker
    Hi all I have encountered this topic lately and couldn't understand why they are needed ... Can you explain me why i should use them in my projects and how they can ease my life . Examples will be great, and where from i can learn this topic little more . Thanks.

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  • array of pointers

    - by tushar
    char *a[]={"diamonds","clubs","spades","hearts"}; char **p[]={a+3,a+2,a+1,a}; char ***ptr=p; cout<<*ptr[2][2]; why does it display h and please explain how is the 2d array of ptr implementing and its elements

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  • WPF Grid scroll

    I want to create two grids in the WPF Page. One grid need scrollbar or scroll viewer. Another grid is static.The grids are placed one by one in the page. How to create and set the scroll in first grid.? plz explain me.

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  • TeX on iPad compatible with Apple's policy?

    - by Yuji
    Hi, As a nerd, I think it would be nice to have a TeX editor on the iPad. But TeX is a Turing-complete language, and it is arguably a general-purpose compiler/interpreter. Does that make it unacceptable to the App Store? Furthermore, if somebody ports TeX compiler to javascript and runs inside WebKit, does it make acceptable to the App Store? FYI, here's the section of the developer's agreement: 3.3.2 An Application may not itself install or launch other executable code by any means, including without limitation through the use of a plug-in architecture, calling other frameworks, other APIs or otherwise. No interpreted code may be downloaded and used in an Application except for code that is interpreted and run by Apple's Published APIs and builtin interpreter(s).

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  • Strange declaration(templates). C++

    - by atch
    Hi, guys could anyone explain to my like to a not very inteligent child what is declared here: (this is taken from another post on this forum) template<typename C> static char (&f(ChT<int Fallback::*, &C::x>*))[1]; how I read it is: template of static function f called with (ChT*) but then I can't make sense why is there address of operator and why is there array? When explaining please picture not very inteligent child and then try to make it clear to it. Thanks for any help

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  • Two separate fields need to be grouped in one group

    - by Sigita
    I have two fields: Mother's employer and Father's employer, and I need to group on the employer. Could somebody help me combine the two above fields into one group? Both fields are in one table. FOr example a child named John Lewis is a record in a table and he has a father and a mother and Mother's employer is IBM and Father's employer is ISF. And so forth. I need to come up with a list By employer where it would show: Employer: IBM John Lewis Emplyer: ISF John Lewis Employer: .... Thank you, Sigita

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  • registerForRemoteNotificationTypes causes app to exit immediately

    - by esilver
    I'm seeing behaviour on my iPhone where debug builds immediately exit after a call to [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert]; The debugger reports it exited with the message Terminating in response to SpringBoard's termination. This behaviour doesn't happen on my ad hoc distribution builds. Can anyone explain this behavior?

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  • Transition from restful authentication to authlogic in not working in rails

    - by user163352
    I'm using restful authentication in rails. Now I just want to change it to Authlogic. I used acts_as_authentic do |c| c.transition_from_restful_authentication = true end and changed the password and salt field to 128 characters.But, if I create a new user crypted password length is 40 characters length(Its not changing to 128 as in authlogic). Plz suggest me, how to change from restful to Authlogic from the start. i.e I have restful authentication now.(how to change it to authlogic..plz explain from start)

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  • Why are Python exceptions named "Error"?

    - by Elena
    Why are Python exceptions named "Error" (e.g. ZeroDivisionError, NameError, TypeError etc) and not "Exception" (e.g. ZeroDivisionException, NameException, TypeException etc). I come from a Java background and started to learn Python recently, as such this is confusing because in java there is a distinction between error and exception. Is there a difference in Python also or not? Can someone explain or point me to some documentation explaining it? Thank you!

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  • what it is Sharepoint ? Main advantages for programmer

    - by netmajor
    Hey, For some time i see that employers demand from programmers knowing Sharepoint, but I have problem with understand what it is :/ But today I was at IT training, and main guy told something like that:" Sharepoint is platform for commit code for programmer, control of version etc..." It is true? It looks like SVN tool... Can someone explain me what advantages it have for c# programmer? Thanks ;)

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  • Unit Testing Hibernate's Optimistic Locking (within Spring)

    - by Michal Bachman
    I'd like to write a unit test to verify that optimistic locking is properly set up (using Spring and Hibernate). I'd like to have the test class extend Spring's AbstractTransactionalJUnit4SpringContextTests. What I want to end up with is a method like this: @Test (expected = StaleObjectStateException.class) public void testOptimisticLocking() { A a = getCurrentSession().load(A.class, 1); a.setVersion(a.getVersion()-1); getCurrentSession().saveOrUpdate(a); getCurrentSession().flush(); fail("Optimistic locking does not work"); } This test fails. What do you recommend as a best practice? The reason I am trying to do this is that I want to transfer the version to the client (using a DTO). I want to prove that when the DTO is sent back to the server and merged with a freshly loaded entity, saving that entity will fail if it's been updated by somebody else in the meantime.

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