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What is the difference between persist() and merge() in JPA and Hibernate?
...X is copied onto a pre-existing
managed entity instance X' of the same
identity or a new managed copy X' of X
is created.
If X is a new entity
instance, a new managed entity
instance X' is created and the state
of X is copied into the new managed
entity instance X'.
If X is a
rem...
Should I use an exception specifier in C++?
...ossible to write with exception specifications,
template<class T>
void f( T k )
{
T x( k );
x.x();
}
The copies might throw, the parameter passing might throw, and x() might throw some unknown exception.
Exception-specifications tend to prohibit extensibility.
virtual void open()...
GoTo Next Iteration in For Loop in java
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Change size of axes title and labels in ggplot2
... answered Feb 18 '13 at 18:15
Didzis ElfertsDidzis Elferts
80k1111 gold badges228228 silver badges183183 bronze badges
...
How do you git show untracked files that do not exist in .gitignore
...
If you see files that you didn't think were in your .gitignore, there may be another one hiding in your project. Ferret it out with ` find . -name .gitignore`.
– jpadvo
Dec 10 '13 at 20:54
...
POST JSON to API using Rails and HTTParty
...
The :query_string_normalizer option is also available, which will override the default normalizer HashConversions.to_params(query)
query_string_normalizer: ->(query){query.to_json}
share
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...
jQuery UI slider Touch & Drag/Drop support on Mobile devices
I have already styled and implemented jQuery UI slider into a project. Though it's responsive, the slider does not respond to being touched and dragged. Instead, you have to touch where you want the slider to go. I'd like to avoid swapping to jQuery mobile UI, which supports touching and dragging, s...
Should bower_components be gitignored?
...ered Nov 8 '15 at 7:26
JoshuaDavidJoshuaDavid
6,92866 gold badges3636 silver badges5050 bronze badges
...
Return only string message from Spring MVC 3 Controller
...is another way:
@RequestMapping(value="/controller", method=GET)
public void foo(HttpServletResponse res) {
try {
PrintWriter out = res.getWriter();
out.println("Hello, world!");
out.close();
} catch (IOException ex) {
...
}
}
but the first meth...
Post an empty body to REST API via HttpClient
...methods which does not require a HttpContent class? Should we at least provide something (even an empty string) to make a http post?
– tugberk
Jan 30 '12 at 10:28
...