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Rails formatting date
...12)
%l - Hour of the day, 12-hour clock, blank-padded ( 1..12)
%P - Meridian indicator, lowercase (``am'' or ``pm'')
%p - Meridian indicator, uppercase (``AM'' or ``PM'')
%M - Minute of the hour (00..59)
%S - Second of the minute (00..59)
%L - Millisecond of the second (000..999)
%N...
HashSet versus Dictionary w.r.t searching time to find if an item exists
...
The accepted answer to this question does NOT validly answer the question! It happens to give the correct answer, but that answer isn't shown by the evidence they provided.
What that answer shows is that Key lookups on a Dictionary or HashSet are vastly quicker than looking...
How to get a pixel's x,y coordinate color from an image?
...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 = document.createElement('canvas');
canvas.width = img.width;
canvas.height = img.height;
canvas.getConte...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
...
@BrianDavidBerman there is, if you set false to 32-but preferred and set x64 or Any CPU on a 64-bit machine.
– Lex Li
Aug 4 '16 at 14:49
...
In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
... generates no errors, but does not do anything.
– David H
Jun 11 '14 at 14:02
10
Note: "Built Set...
Does a const reference class member prolong the life of a temporary?
...in your example is bound to the constructor's argument n, and becomes invalid when the object n is bound to goes out of scope.
The lifetime extension is not transitive through a function argument. §12.2/5 [class.temporary]:
The second context is when a reference is bound to a temporary. The te...
visual c++: #include files from other projects in the same solution
...ncies. How do I #include a header file from a different project? I have no idea how to use classes from one project in another.
...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...not so good compared with MessagePack.
BSON has special types like "ObjectId", "Min key", "UUID" or "MD5" (I think these types are required by MongoDB). These types are not compatible with JSON. That means some type information can be lost when you convert objects from BSON to JSON, but of course o...
How to automatically generate N “distinct” colors?
...arge the colors can start to look similar. I can also imagine evenly subdividing the RGB cube into a lattice and then drawing points. Does anyone know any other methods? I'm ruling out defining a list and then just cycling through it. I should also say I don't generally care if they clash or don't l...
Knight's Shortest Path on Chessboard
...alt
previous[v] := u
return dist[]
EDIT:
as moron, said using the
http://en.wikipedia.org/wiki/A*_algorithm
can be faster.
the fastest way, is
to pre-calculate all the distances
and save it to a 8x8 full matrix.
well, I would call that cheating,
and works only because the probl...