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Python: fastest way to create a list of n lists
...ly way which is marginally faster than
d = [[] for x in xrange(n)]
is
from itertools import repeat
d = [[] for i in repeat(None, n)]
It does not have to create a new int object in every iteration and is about 15 % faster on my machine.
Edit: Using NumPy, you can avoid the Python loop using
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How can I pass a member function where a free function is expected?
...and call your member through a forwarding function which obtains an object from the void* and then calls the member function.
In a proper C++ interface you might want to have a look at having your function take templated argument for function objects to use arbitrary class types. If using a templat...
Get Current Area Name in View or Controller
...
From MVC2 onwards you can use ViewContext.RouteData.DataTokens["area"]
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Entity Framework: One Database, Multiple DbContexts. Is this a bad idea? [closed]
...multiple context types - for example shared entity types and their passing from one context to another, etc. Generally it is possible, it can make your design much cleaner and separate different functional areas but it has its costs in additional complexity.
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What is an existential type?
...ytecode type is, but it doesn't need to; all it does is relay the bytecode from VirtualMachine.compile to VirtualMachine.run.
Java type wildcards (ex: List<?>) are a very limited form of existential types.
Update: Forgot to mention that you can sort of simulate existential types with univers...
Array vs. Object efficiency in JavaScript
... But I want to know what is performing better: retrieving an object from an array (by looping through it) or from an "associative" object where the id is the key. I'm sorry if my question wasn't clear...
– Moshe Shaham
Jun 25 '13 at 10:57
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Call UrlHelper in models in ASP.NET MVC
...ference of the current HttpContext
HttpContext.Current
which is derived from System.Web. Therefore, the following will work anywhere in an ASP.NET MVC application:
UrlHelper url = new UrlHelper(HttpContext.Current.Request.RequestContext);
url.Action("ContactUs"); // Will output the proper link a...
How do I test a camera in the iPhone simulator?
...ctions how to downgrade your device: iclarified.com/31004/how-to-downgrade-from-ios-7-beta-to-ios-6
– knagode
Jun 18 '13 at 15:25
5
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Correct way to load a Nib for a UIView subclass
... nil;
NSArray* elements = [[NSBundle mainBundle] loadNibNamed: NSStringFromClass([self class]) owner:self options: nil];
for (id anObject in elements)
{
if ([anObject isKindOfClass:[self class]])
{
result = anObject;
break;
}
}
retu...
Print a file, skipping the first X lines, in Bash [duplicate]
...number>, I just tested it. So tail -n +1 won't skip anything, but start from the first line instead.
– Andres F.
Aug 22 '12 at 14:36
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