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Daylight saving time and time zone best practices [closed]
...e JODA jar file as per this article (joda.org/joda-time/tz_update.html) in order to keep up to date with the latest timezone information. Is there any standard way of downloading the latest timezone data from IANA website (iana.org/time-zones) and rebuilding the joda library? In other words, is it p...
String concatenation vs. string substitution in Python
...my scripts, and I was wondering what the cost was. I ran them in different orders to make sure nothing was interfering, or getting better performance being first or last. On a side note, I threw in some longer string generators into those functions like "%s" + ("a" * 1024) and regular concat was alm...
Why does string::compare return an int?
...erload resolution. Finally, C++11 introduces
several new distinctions, in order to support rvalue references;
these, too, are mainly applicable to class types.
Integral promotion refers to the fact that when integral types
smaller than an int are used as rvalues in an expression, in
most contexts,...
Is there a performance gain in using single quotes vs double quotes in ruby?
...
The measured differences are not meaningful. Just the order (because of garbage collection) can make important a difference. There is no runtime difference between ' and " as they are parsed to the same thing.
– Marc-André Lafortune
Aug 1 ...
Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Why should I use a pointer rather than the object itself?
...y, you shouldn't abuse it. So here are some disadvantages in no particular order:
It is error-prone. Manual memory allocation is dangerous and you are prone to leaks. If you are not proficient at using the debugger or valgrind (a memory leak tool), you may pull your hair out of your head. Luckily ...
Compile time string hashing
...l over std::hash's algorithm, and we must reimplement it as a constexpr in order to evaluate it at compile time. In addition, there are no "transparent" hashes in std, so you cannot (without creating a std::string) hash a raw character buffer as a std::string.
I stuck the std::string custom hasher...
Deserialize JSON into C# dynamic object?
...C# 4 dynamic type? It would be nice to skip creating a bunch of classes in order to use the DataContractJsonSerializer .
...
how to draw smooth curve through N points using javascript HTML5 canvas?
... 2, 4, 4);
}
}
To draw a curve have an array with x, y points in the order: x1,y1, x2,y2, ...xn,yn.
Use it like this:
var myPoints = [10,10, 40,30, 100,10]; //minimum two points
var tension = 1;
drawCurve(ctx, myPoints); //default tension=0.5
drawCurve(ctx, myPoints, tension);
The functio...
Why do we need private subnet in VPC?
...are an instance on a "public" subnet, then you need a public IP address in order to do a significant number of things that servers commonly need to do.
For instances with only a private IP address, there's an alternate way of outbound access to the Internet. This is where Network Address Translati...