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What is a clean, pythonic way to have multiple constructors in Python?
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Actually None is much better for "magic" values:
class Cheese():
def __init__(self, num_holes = None):
if num_holes is None:
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Now if you want complete freedom of adding more parameters:
class Cheese...
Why should I implement ICloneable in c#?
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Wayback link to article, which is 404 now: web.archive.org/web/20040419170407/http://blogs.msdn.com/brada/…
– harpo
Sep 7 '13 at 17:48
2
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How do I migrate a model out of one django app and into a new one?
... that one of these models should be in a separate app. I do have south installed for migrations, but I don't think this is something it can handle automatically. How can I migrate one of the models out of the old app into a new one?
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What is the difference between Python and IPython?
... load into your own projects.
Easy to use, high performance tools for parallel computing.
Note that the first 2 lines tell you it helps you make the most of using Python. Thus, you don't need to alter your code, the IPython shell runs your python code just like the normal python shell does, o...
What new capabilities do user-defined literals add to C++?
C++11 introduces user-defined literals which will allow the introduction of new literal syntax based on existing literals ( int , hex , string , float ) so that any type will be able to have a literal presentation.
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How can I convert ereg expressions to preg in PHP?
...pha-numeric, a backslash or a whitespace character. The most used are generally ~, / and #.
You can also use matching brackets:
preg_match('[^hello]', $str);
preg_match('(^hello)', $str);
preg_match('{^hello}', $str);
// etc
If your delimiter is found in the regular expression, you have to escap...
How can you do paging with NHibernate?
...od, which indicates the index of the first item that you wish to get (basically the first data row in your page).
It also has a SetMaxResults(int i) method, which indicates the number of rows you wish to get (i.e., your page size).
For example, this criteria object gets the first 10 results of yo...
Use tnsnames.ora in Oracle SQL Developer
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I downloaded and installed the Oracle SQL Developer to connect to an already existing Oracle 11g database. But it seems that I will need to download and install Oracle client software also, which one do I use if I am on Windows 10?
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How to shuffle a std::vector?
...n Coliru
Make sure to reuse the same instance of rng throughout multiple calls to std::shuffle if you intend to generate different permutations every time!
Moreover, if you want your program to create different sequences of shuffles each time it is run, you can seed the constructor of the random e...
When would anyone use a union? Is it a remnant from the C-only days?
I have learned but don't really get unions. Every C or C++ text I go through introduces them (sometimes in passing), but they tend to give very few practical examples of why or where to use them. When would unions be useful in a modern (or even legacy) case? My only two guesses would be programming ...