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How to fix the Hibernate “object references an unsaved transient instance - save the transient insta
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You should include cascade="all" (if using xml) or cascade=CascadeType.ALL (if using annotations) on your collection mapping.
This happens because you have a collection in your entity, and that collection has one or more items which are not present in ...
Why does my application spend 24% of its life doing a null check?
...t store a copy of the bytes in RAM. An important one is the L1 cache, typically 16 kilobytes for data and 16 kilobytes for instructions. Small, allowing it to be close to the execution engine. Reading bytes from the L1 cache typically takes 2 or 3 CPU cycles. Next up is the L2 cache, bigger and slow...
Android activity life cycle - what are all these methods for?
...o many similar sounding methods ( onCreate() , onStart() , onResume() ) called during initialization, and so many others ( onPause() , onStop() , onDestroy() ) called at the end?
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How to sort a file, based on its numerical values for a field?
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Thank you all, folks! This is wired, because I looked over its man page back and forth several times and I didnt see that option. Ah, I was at a simplified man page. Damn!
– lukmac
Jan 31 '11 at 2...
How to exclude certain messages by TAG name using Android adb logcat?
Logcat allows filtering logs but it works like that: You define filters and logcat only displays messages which matches filters. But is there a way to display all logs EXCEPT some TAGs defined by filters?
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How to fix Error: “Could not find schema information for the attribute/element” by creating schema
...ML" menu and select "Create Schema". This action should create a new file called "app.xsd" or "web.xsd".
Save that file to your disk.
Go back to your app.config or web.config and in the edit window, right click and select properties. From there, make sure the xsd you just generated is referenced in ...
what is the difference between OLE DB and ODBC data sources?
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Actually sometimes OLE DB wraps the ODBC driver, sometimes it doesn't. See here
– bobobobo
Apr 11 '12 at 2:42
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How do you fork your own repository on GitHub?
...pstream https://github.com/userName/Repo
git push origin master
git push --all
(see git push)
See the all process described at "Fork your own project on GitHub".
Six years later (2016), you now have the GitHub importer which allows you to import a repo from another source... including GitHub.
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MySQL - why not index every field?
...y I've learned the wonder of indexes, and performance has improved dramatically. However, with all I've learned, I can't seem to find the answer to this question.
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Null or default comparison of generic argument in C#
...IEquatable<T> (without boxing) as well as object.Equals, and handles all the Nullable<T> "lifted" nuances. Hence:
if(EqualityComparer<T>.Default.Equals(obj, default(T))) {
return obj;
}
This will match:
null for classes
null (empty) for Nullable<T>
zero/false/etc for...