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How exactly does a generator comprehension work?
What does generator comprehension do? How does it work? I couldn't find a tutorial about it.
6 Answers
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When do I need to use AtomicBoolean in Java?
...thread-safe. You can fix it by using AtomicBoolean:
if (atomicInitialized.compareAndSet(false, true)) {
initialize();
}
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How do CDI and EJB compare? interact?
...EJB container.
Seems that CDI does understand what EJB is, so in Java EE 6 compliant server, in your servlet you can write both
@EJB EJBService ejbService;
and
@Inject EJBService ejbService;
that's what can make you confusing, but that's probably the only thing which is the bridge between EJB and ...
Remove unused references (!= “using”)
...nced assembly, and pick "Find Dependent Code". See:
http://www.jetbrains.com/resharper/features/navigation_search.html#Find_ReferencedDependent_Code
You will either get:
A list of the dependencies on that Reference in a browser window, or
A dialog telling you "Code dependent on module XXXXXXX w...
How do you get the length of a list in the JSF expression language?
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Yes, since some genius in the Java API creation committee decided that, even though certain classes have size() members or length attributes, they won't implement getSize() or getLength() which JSF and most other standards require, you can't do what you want.
There's a co...
Set NOW() as Default Value for datetime datatype?
...P,
modification_time DATETIME ON UPDATE CURRENT_TIMESTAMP
)
Or even combine both rules:
modification_time DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
Reference:
http://dev.mysql.com/doc/refman/5.7/en/timestamp-initialization.html
http://optimize-this.blogspot.com/2012/04...
How do I limit the number of results returned from grep?
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Javascript: Extend a Function
...turn publicSymbols;
})();
(Much of the above could be written a bit more compactly, but I wanted to use clear names like publicSymbols rather than my usual pubs or anonymous object literal. You can write it a lot more compactly if you want to have anonymous functions, but I don't much care for ano...
Creating JS object with Object.create(null)?
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filter items in a python dictionary where keys contain a specific string
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How about a dict comprehension:
filtered_dict = {k:v for k,v in d.iteritems() if filter_string in k}
One you see it, it should be self-explanatory, as it reads like English pretty well.
This syntax requires Python 2.7 or greater.
In Pyth...