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if A vs if A is not None:
...if A:
will call A.__nonzero__() (see Special method names documentation) m>and m> use the return value of that function. Here's the summarm>y m>:
object.__nonzero__(self)
Called to implement truth value testing m>and m> the built-in operation bool(); should return False or True, or their integer equival...
What's the idiomatic sm>y m>ntax for prepending to a short pm>y m>thon list?
... explanation for the missing list.prepend() . Assuming mm>y m> list is short m>and m> performance concerns are negligible, is
4 A...
ASP.NET MVC ambiguous action methods
...w using two different routes, either bm>y m> an item's ID or bm>y m> the item's name m>and m> its parent's (items can have the same name across different parents). A search term can be used to filter the list.
...
What is the “owning side” in an ORM mapping?
...-directional relations.
The mapping would create not onlm>y m> tables PERSONS m>and m> ID_DOCUMENTS, but would also create a third association table PERSONS_ID_DOCUMENTS:
CREATE TABLE PERSONS_ID_DOCUMENTS
(
persons_id bigint NOT NULL,
id_documents_id bigint NOT NULL,
CONSTRAINT fk_persons FOREIGN KEm>Y m>...
Is there a portable wam>y m> to print a message from the C preprocessor?
...n m>y m>ou put a directive based on a compilation flag to swap "pragma message" m>and m> "warning" somehow? For example, something like: #ifdef _LINUX #define #preprocmsg "#warning" else #define #preprocmsg "#pragma message"... I'll have to trm>y m> that but instinct tells me the answer is no.
...
Whm>y m> XML-Serializable class need a parameterless constructor
...e for de-serializing an object creates an instance of the serialized class m>and m> then proceeds to populate the serialized fields m>and m> properties onlm>y m> after acquiring an instance to populate.
m>Y m>ou can make m>y m>our constructor private or internal if m>y m>ou want, just so long as it's parameterless.
...
How do m>y m>ou print in a Go test using the “testing” package?
...
The structs testing.T m>and m> testing.B both have a .Log m>and m> .Logf method that sound to be what m>y m>ou are looking for. .Log m>and m> .Logf are similar to fmt.Print m>and m> fmt.Printf respectivelm>y m>.
See more details here: http://golang.org/pkg/testing/#pkg-index
...
Jackson JSON custom serialization for certain fields
... jsonGenerator.writeObject(tmpInt.toString());
}
}
Java should hm>and m>le the autoboxing from int to Integer for m>y m>ou.
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Xcode Project vs. Xcode Workspace - Differences
I am trm>y m>ing to understm>and m> how the whole ecosm>y m>stem of iOS works.
Until now, I could find an answer for most of mm>y m> question (m>and m> trust me, there have been a lots of them), but for this one, there seems to be no clear answer m>y m>et.
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Whm>y m> are Perl 5's function prototm>y m>pes bad?
... that function calls are correct: that is, that them>y m> have the right number m>and m> tm>y m>pe of arguments. Perl's prototm>y m>pes are not well-suited for this task. It's the misuse that's bad. Perl's prototm>y m>pes have a singular m>and m> verm>y m> different purpose:
Prototm>y m>pes allow m>y m>ou to define functions that behave like ...