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Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...s, and move constructing it into a value_type.
That is what some people call universal reference, but really is reference collapsing. In your case, where the argument is an lvalue of type pair<int,shared_ptr<int>> it will not result in the argument being an rvalue reference and it sho...
Rails formatting date
...fy in strftime method:
Date (Year, Month, Day):
%Y - Year with century (can be negative, 4 digits at least)
-0001, 0000, 1995, 2009, 14292, etc.
%C - year / 100 (round down. 20 in 2009)
%y - year % 100 (00..99)
%m - Month of the year, zero-padded (01..12)
%_m blank-pa...
$.ajax - dataType
...ocumentation has full descriptions of these as well.
In your particular case, the first is asking for the response to be in UTF-8, the second doesn't care. Also the first is treating the response as a JavaScript object, the second is going to treat it as a string.
So the first would be:
succes...
HashSet versus Dictionary w.r.t searching time to find if an item exists
...ormance test, taken from here.
Add 1000000 objects (without checking duplicates)
Contains check for half the objects of a collection of 10000
Remove half the objects of a collection of 10000
share
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What is Full Text Search vs LIKE
...
In general, there is a tradeoff between "precision" and "recall". High precision means that fewer irrelevant results are presented (no false positives), while high recall means that fewer relevant results are missing (no false negatives). Using the LIKE operator gives you 100% precis...
How to get a pixel's x,y coordinate color from an image?
...
Building on Jeff's answer, your first step would be to create a canvas representation of your PNG. The following creates an off-screen canvas that is the same width and height as your image and has the image drawn on it.
var img = document.getElementById('my-image');
var canvas = docume...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
...n “Any CPU 32-bit preferred” and “x86” is
only this: a .NET application compiled to x86 will fail to run on an
ARM Windows system, but an “Any CPU 32-bit preferred” application will
run successfully.
share...
In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
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In Swift you can still use the "#if/#else/#endif" preprocessor macros (although more constrained), as per Apple docs. Here's an example:
#if DEBUG
let a = 2
#else
let a = 3
#endif
Now, you must set the "DEBUG" symbol elsewhere,...
Does a const reference class member prolong the life of a temporary?
...
Only local const references prolong the lifespan.
The standard specifies such behavior in §8.5.3/5, [dcl.init.ref], the section on initializers of reference declarations. The reference in your example is bound to the constructor's...
visual c++: #include files from other projects in the same solution
...nclude "filename.h"
Note that you don't need to specify the path here, because you include the directory in the Additional Include Directories already, so Visual Studio will know where to look for it.
If you don't want to add every header file location in the project settings, you could just incl...