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The tilde operator in C
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Bitwise NOT is useful for a number of things, for example, bit masks. I am not sure what you mean by unsigned to signed integer conversion.
– GWW
Oct 20 '15 at 18:15
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas
The whole question fits in the title. And to add some context: I'm not asking what is the best according to what the specs are saying, but rather what works the best given the mix of browsers deployed nowadays.
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What does ||= (or-equals) mean in Ruby?
...ted assignments" of the Ruby Language Draft Specification.
As a first approximation,
a ||= b
is equivalent to
a || a = b
and not equivalent to
a = a || b
However, that is only a first approximation, especially if a is undefined. The semantics also differ depending on whether it is a simple variab...
C++ equivalent of Java's toString?
...t; ")";
}
This way you can output instances of your class on streams:
A x = ...;
std::cout << x << std::endl;
In case your operator<< wants to print out internals of class A and really needs access to its private and protected members you could also declare it as a friend func...
Most efficient way to concatenate strings?
...thod is much better than using the + operator. But I've found that, when executing 1000 concatenations or less, String.Join() is even more efficient than StringBuilder.
StringBuilder sb = new StringBuilder();
sb.Append(someString);
The only problem with String.Join is that you have to concatenat...
Handling JSON Post Request in Go
...self that Go has better designed libraries than this, but I can't find an example of Go handling a POST request of JSON data. They are all form POSTs.
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How to check if an element does NOT have a specific class?
How do I check if there isn't a class. For example, I know how to check to see if it has the class "test", but how do I check to see if it doesn't have the class "test"?
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Can a constructor in Java be private?
...e it private, but then your remaining constructors delegate to it.
As an example of delegating constructors, the following class allows you to save a value and a type, but it only lets you do it for a subset of types, so making the general constructor private is needed to ensure that only the permi...
Overlaying histograms with ggplot2 in R
...stogram(data = highf0, fill = "green", alpha = 0.2) +
Here's a concrete example with some output:
dat <- data.frame(xx = c(runif(100,20,50),runif(100,40,80),runif(100,0,30)),yy = rep(letters[1:3],each = 100))
ggplot(dat,aes(x=xx)) +
geom_histogram(data=subset(dat,yy == 'a'),fill = "red",...