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Pimpl idiom vs Pure virtual class interface
...ltiple pimpls depending on the implementation desired. Often this is say a win32 impl vs a linux impl of something that needs to be implemented differently per platform.
– Doug T.
May 5 '09 at 14:10
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How do I “source” something in my .vimrc file?
...:set yy bbbb4dw
The only file sourced by default is the .vimrc(_vimrc on windows) so that's a place you can keep all the commands you use to set up Vim every time.
Where it gets interesting is the fact that since a sourced file is just a series of commands, and sourcing is a command, you can sour...
Async call with await in HttpClient never returns
...a call I am making from inside a xaml-based, C# metro application on the Win8 CP; this call simply hits a web service and returns JSON data.
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Multiprocessing: How to use Pool.map on a function defined in a class?
...rictions on what sort of functions pool.map could accept. I wrote the following to circumvent this. It appears to work, even for recursive use of parmap.
from multiprocessing import Process, Pipe
from itertools import izip
def spawn(f):
def fun(pipe, x):
pipe.send(f(x))
pipe.clo...
Making a property deserialize but not serialize with json.net
...rialization.Json & Newtonsoft.Json) and it worked for me like the following:
flag all your class and sub-classes as "DataContract".
flag all the properties of your class and sub-classes as "DataMember".
flag all the properties of your class and sub-classes as "JsonProperty" except those you ...
Advantages of std::for_each over for loop
..., replace, etc and these won't look so strange anymore. This can be a huge win.
Update 1:
Most importantly, it helps you go beyond for_each vs. for-loops like that's all there is, and look at the other STL-alogs, like find / sort / partition / copy_replace_if, parallel execution .. or whatever.
A ...
How to convert An NSInteger to an int?
...stem.
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
#else
typedef int NSInteger;
#endif
You can use NSInteger any place you use an int without converting it.
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Advantage of switch over if-else statement
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This immediate-constant bitmap is a big win, because there's no cache miss on the bitmap. It works if the "special" error codes are all in a range 64 or less. (or 32 for legacy 32bit code.) The compiler subtracts the smallest case value, if it's non-zero. The t...
What is the difference between memmove and memcpy?
...than memcpy and if you are unlucky, it may even be slower, so you can only win calling memcpy.
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Python __call__ special method practical example
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@delnan: This is not intended to be shortest. No one wins at code golf. It's intended to show __call__, be simple and nothing more.
– S.Lott
Apr 28 '11 at 21:06
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