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  • How to delete child table records during the update of parent table using Hibernate

    - by Harsha
    I have a Parent Table A and child tables B,C with many to one relations. Lets say I have data like, for primary key 1 in parent table A I have 3 rows in child table B and 4 rows in child table C. Now if I want to delete the rows of the child table during an update of the parent table(that means Now, I want to update the table only with one row in each child tables and delete the other rows in them) then how to handle this scenario in hibernate?

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  • Grails many to many using a third 'join' class

    - by andy mccullough
    I read that a m:m relationship often means there is a third class that isn't yet required. So I have m:m on User and Project, and I created a third domain class, ProjectMembership The three domains are as follows (minimized for illustration purposes): User class User { String name static hasMany = [projectMemberships : ProjectMembership] } Project Membership class ProjectMembership { static constraints = { } static belongsTo = [user:User, project:Project] } Project: class Project { String name static hasMany = [projectMemberships : ProjectMembership] static constraints = { } } If I have the ID of the user, how can I get a list of Project objects that they are assigned to?

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  • How to set Background image for iphone app in phonegap

    - by Sandeep
    I am new in phonegap development and i am developing one project for iphone application with use of phonegap framework. I am setting http://www.wallpaperbase.com/wallpapers/computer/mac/mac_8.jpg image as a background of my iphone application but its showing problem with image means image not properly displaying on my iphone Device like as given image example below. Please solve my issue ASPS. Please check my code and let me know what's wrong in it.

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  • Print layout of C++ object with g++ compiler

    - by zaheer
    Is there a way to print the layout of a C++ object using the g++ compiler or any other means. A simplified example (assuming int takes 4 bytes) class A{ int a; }; class B:public A{ int b; } so the output would be A - 0 4 + a + B- 0 4 8 + A.a + b + It would be useful to understand the layout of objects (in my case virtual machine code). Thanks in advance. Regards, Zaheer

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  • What is DEFAULT_CC in function declaration?

    - by humoeba
    I'm relatively new to C, and am curious what this syntax means in a function declaration: int DEFAULT_CC foo(void) where DEFAULT_CC is probably defined somewhere else as: #define DEFAULT_CC "cc" Is this a direction to use a certain compiler or something?

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  • $Id tag in comment headers

    - by Bernhard
    When I read source from open source projects I often find a comment line with "$Id" at the header of the file, f. ex.: // $Id: addappwindowa.c 30792 2009-03-07 22:40:04Z neil $ Is there an "offical" syntax for this lines? (What does "30792" means? ) Are there editors that auto-generate these "$Id"s? Are there any tools that use this information?

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  • Several C# Language Questions

    - by Water Cooler v2
    1) What is int? Is it any different from the struct System.Int32? I understand that the former is a C# alias (typedef or #define equivalant) for the CLR type System.Int32. Is this understanding correct? 2) When we say: IComparable x = 10; Is that like saying: IComparable x = new System.Int32(); But we can't new a struct, right? or in C like syntax: struct System.In32 *x; x=>someThing = 10; 3) What is String with a capitalized S? I see in Reflector that it is the sealed String class, which, of course, is a reference type, unlike the System.Int32 above, which is a value type. What is string, with an uncapitalized s, though? Is that also the C# alias for this class? Why can I not see the alias definitions in Reflector? 4) Try to follow me down this subtle train of thought, if you please. We know that a storage location of a particular type can only access properties and members on its interface. That means: Person p = new Customer(); p.Name = "Water Cooler v2"; // legal because as Name is defined on Person. but // illegal without an explicit cast even though the backing // store is a Customer, the storage location is of type // Person, which doesn't support the member/method being // accessed/called. p.GetTotalValueOfOrdersMade(); Now, with that inference, consider this scenario: int i = 10; // obvious System.object defines no member to // store an integer value or any other value in. // So, my question really is, when the integer is // boxed, what is the *type* it is actually boxed to. // In other words, what is the type that forms the // backing store on the heap, for this operation? object x = i; Update Thank you for your answers, Eric Gunnerson and Aaronought. I'm afraid I haven't been able to articulate my questions well enough to attract very satisfying answers. The trouble is, I do know the answers to my questions on the surface, and I am, by no means, a newbie programmer. But I have to admit, a deeper understanding to the intricacies of how a language and its underlying platform/runtime handle storage of types has eluded me for as long as I've been a programmer, even though I write correct code.

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  • jQuery: snapped scrolling - possible?

    - by Fuxi
    hi all, i'm having a scrollable table with fixed header. would it be possible to have "snapped scrolling" on the scrollbar - which means that the table rows won't scroll pixel by pixel but snap responding to its row height, for better viewing. thx

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  • Eclipse Type Hierarchy Question

    - by Tom Tresansky
    In Eclipse, the Java Method Override Indicator is the little upwards arrow next to a method in the Type Hierarchy view. A solid arrow means a method overrides an existing method lower in the hierarchy. What does the hollow arrow mean? Do annotations effect either arrow?

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  • How to get the list in second image ?

    - by rajesh
    Hi, actually i have 2 images ,when we click on one image it generates pop window containing n no of list. if i click on any link 2 parameters are passed to function one for url and other image path and now i have another image ,what i want to do is if i click on that image it will generate a list which has a content of first image after clicking any link of first image means if i click image1 image2 1 2 3 now if i click 1 then result must be like this image1 image2 1 1 2 3 Please help thanks.

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  • python and overflowing byte?

    - by Meloun
    Hi all, I need to make a variable with similar behaviour like in C lanquage. I need byte or unsigned char with range 0-255. This variable should overflow, that means... myVar = 255 myVar += 1 print myVar #!!myVar = 0!!

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  • Java syntax of +

    - by Pindatjuh
    Why is the following syntax correct: x = y+++y; (Where it means y++ + y or y + ++y which both mean y * 2 + 1) But this is not valid syntax: x = y+++++y; (Which should mean y++ + ++y, which must mean y and increase y and then add ++y which increases y thus y * 2 + 2) Is there a reason for this?

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  • how to calculate geometric values in C#

    - by user321182
    i want design a dll for geometric points i have x value and y value from that i have to enter more x value and y value and two x points and two y points means.i have to find the distance...this is one dll then second class library we have to get the points from first class library and calculate slope angel

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  • How to determine whether there is date in the string or not with different date format ?

    - by Harikrishna
    I am parsing table information from the html table.Now I want to check whether there is date in the records for one particular column.Means I want to check whether there is date in the string or not .And date can be in different format like the string can be FUTIDX 26FEB2009 NIFTY 0 -- There is date in the string. FUTIDX MINIFTY 30 Jul 2009 -- There is date in the string. FUTSTK ONGC 27 Mar 2008 -- There is date in the string. How can I do that ?

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  • Anchor tag issue in FF; targeting hidden div...

    - by Biff
    Hello! I'm having an issue with Firefox and anchor links from an external page to a tab div on the landing page; while IE render these correctly (I know, that means little), FF and Chrome both send the user to a place somewhat above or below the actual anchor tag. I didn't write the original code, but I'm not able to find much about a FF bug that would cause this, or a solution? Starting link: http://www.washington.edu/students/gencat/academic/sis.html#INTSTUDUG

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  • start service under logged on user account by changing token

    - by sam
    hi all,i have a desktop application that install and start a service,i know a process can get the explorer.exe token and lunch another process with the tkoen,it means the second process will run us logged on account, my question is this that can i start my service by explorer.exe token too ? is there is an example in delphi? thx for ur time

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  • Can we build websites in Java

    - by Mirage
    IF some says to me to build webisite in java. What does that mean. That means building in core java, java servlets , jsp , java beans , j2ee or what. What thing i need to learn if some tells me to make webiste in java. Just like there are ready made login scripts in php , are those available in java as well thanks

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