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What is the most efficient/elegant way to parse a flat table into a tree?
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Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL...
What is the difference between #import and #include in Objective-C?
...was already included, as
far as #import is concerned, that file is now already completely included.
Bottom line:
C/C++ headers traditionally includes parts of other include files.
So for C/C++ headers, use #include.
For objc/objc++ headers, use #import.
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What is an EJB, and what does it do?
...you place EJBs in general? I'd say they belong to Model layer, although I know many people who say they are controllers. If EJB contain business logic (you said they do), then they're model layer by definition.
– user107986
Sep 29 '15 at 20:43
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Objective-C: Property / instance variable in category
...nnot create a synthesized property in a Category in Objective-C, I do not know how to optimize the following code:
6 Answer...
mongoose vs mongodb (nodejs modules/extensions), which better? and why?
... In case anyone was wondering the documentation is pretty good now.
– Kevin Beal
Jan 18 '13 at 6:03
7
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What exactly is a reentrant function?
...the code holding the const reference being told.
7.4. Make sure the user knows your object is not thread-safe
Thus, the user is responsible to use mutexes to use an object shared between threads.
The objects from the STL are designed to be not thread-safe (because of performance issues), and thus...
Does functional programming replace GoF design patterns?
...n patterns
found available to every other OOP
language. In fact, right now I use F#
and OCaml everyday, and there are no
striking differences between the
patterns I use in these languages vs
the patterns I use when I write in
Java.
Perhaps because you're still thinking imperatively? ...
C++: How to round a double to an int? [duplicate]
....
float x = 55; // stored as 54.999999...
x = x + 0.5 - (x<0); // x is now 55.499999...
int y = (int)x; // truncated to 55
C++11 also introduces std::round, which likely uses a similar logic of adding 0.5 to |x| under the hood (see the link if interested) but is obviously more robust.
A follo...
HtmlEncode from Class Library
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Thanks, Now I can use the .NET 4 Client Profile instead of the full framework!
– Annagram
Aug 25 '10 at 20:13
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Convert PDF to clean SVG? [closed]
...ucted - you have to install vector fonts and look them up.
UPDATE:
I have now developed this into a package PDF2SVG which does not use Batik any more:
which has been tested on a range of PDFs. It produces SVG output consisting of
characters as one <svg:text> per character
paths as <svg:...