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JPA EntityManager: Why use persist() over merge()?
EntityManager.merge() can insert new objects and update existing ones.
15 Answers
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How to map calculated properties with JPA and Hibernate
...a childCount property. This property is not mapped to a database column . Instead, it should be calculated by the database with a COUNT() function operating on the join of my Java bean and its children. It would be even better if this property could be calculated on demand / "lazily", but this is...
Setting PayPal return URL and making it auto return?
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You have to enable auto return in your PayPal account, otherwise it will ignore the return field.
From the documentation (updated to reflect new layout Jan 2019):
Auto Return is turned off by default.
To turn on Auto Return:
Log in to your P...
There can be only one auto column
How do I correct the error from MySQL 'you can only have one auto increment column'.
4 Answers
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How to print HTML content on click of a button, but not the page? [duplicate]
I want to print some HTML content, when the user clicks on a button. Once the user clicks on that button, the print dialog of the browser will open, but it will not print the webpage. Instead, it will print the some other HTML content which is not displayed on the page.
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How to generate a simple popup using jQuery
I am designing a web page. When we click the content of div named mail, how can I show a popup window containing a label email and text box?
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Sequence contains more than one element
I'm having some issues with grabbing a list of type "RhsTruck" through Linq and getting them to display.
5 Answers
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Fragment Inside Fragment
I need help regarding working on fragment inside fragment, actually I
am facing a problem on pressing back button. Application Main screen
has buttons and pressing on each button view replace with new
fragment(and that fragment contain inside another fragment),
dynamically adding/replacing fragment ...
Set element focus in angular way
After looking for examples of how set focus elements with angular, I saw that most of them use some variable to watch for then set focus, and most of them use one different variable for each field they want to set focus. In a form, with a lot of fields, that implies in a lot of different variables.
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Android Debug Bridge (adb) device - no permissions [duplicate]
I have a problem connecting HTC Wildfire A3333 in debugging mode with my Fedora Linux 17. Adb says:
20 Answers
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