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What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
...dress;
:
}
Orphan Removal
JPA 2 supports an additional and more aggressive remove cascading mode
which can be specified using the orphanRemoval element of the
@OneToOne and @OneToMany annotations:
@Entity
class Employee {
:
@OneToOne(orphanRemoval=true)
private Addr...
Can Android do peer-to-peer ad-hoc networking?
...without having a server. I would like to use wifi since bluetooth range is more limited.
11 Answers
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JavaScript to scroll long page to DIV
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What does the “Just” syntax mean in Haskell?
... way in which you can do case analysis of values that belong to types with more than one constructor.
In order to use a Maybe a value in a pattern match, you need to provide a pattern for each constructor, like so:
case maybeVal of
Nothing -> "There is nothing!"
Just val -> "There...
Finding which process was killed by Linux OOM killer
...sense here. Plain old grep, or if we're being specific, fgrep, makes much more sense. (Editing answer accordingly.)
– antak
Nov 10 '16 at 0:49
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Do SVG docs support custom data- attributes?
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there is a more general mechanism.
svg supports desc elements which may contain arbitrary xml from other namespaces. link instances of this elements or child nodes from you own namespace by dependent ids or refid attributes.
this is t...
Testing whether a value is odd or even
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Simple Log to File example for django 1.3+
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How to get hosting Activity from a view?
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What is a stream?
...Metaphor
As mentioned a stream is a metaphor, an abstraction of something more complex. To get your imagination working I offer some other metaphors:
you want to fill an empty pool with water. one way to accomplish this is to attach a hose to a spigot, placing the end of the hose in the pool and ...