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What is Persistence Context?
...nce context is normally accessed via an EntityManager.
http://docs.oracle.com/javaee/6/api/javax/persistence/EntityManager.html
The various states an entity can have and the transitions between these are described below:
http://docs.jboss.org/hibernate/entitymanager/3.6/reference/en/html/objectst...
How can I dynamically create a selector at runtime with Objective-C?
I know how to create a SEL at compile time using @selector(MyMethodName:) but what I want to do is create a selector dynamically from an NSString . Is this even possible?
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Meaning of Open hashing and Closed hashing
... (aka. address) at which an object will be stored in the hash table is not completely determined by its hash code. Instead, the index may vary depending on what's already in the hash table.
The "closed" in "closed hashing" refers to the fact that we never leave the hash table; every object is st...
Android Fragments: When to use hide/show or add/remove/replace?
...e it because it's a less expensive operation to redraw it's layout than to completely reinitialize it.
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How do I set the default font size in Vim?
...
For the first one remove the spaces. Whitespace matters for the set command.
set guifont=Monaco:h20
For the second one it should be (the h specifies the height)
set guifont=Monospace:h20
My recommendation for setting the font is to do (if your version supports it)
set guifont=*
This ...
Aggregate function in an SQL update query?
... 'join' to account for this or your sums will be inaccurate (stackoverflow.com/a/14366034/16940)
– Simon_Weaver
Nov 9 '18 at 10:07
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