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What is the difference between typeof and instanceof and when should one be used vs. the other?
...rect...from the book : " github.com/getify/You-Dont-Know-JS" a instanceof Foo; // true The instanceof operator takes a plain object as its left-hand operand and a function as its right-hand operand. The question instanceof answers is: in the entire [[Prototype]] chain of a, does the object arbitrar...
How do you declare an interface in C++?
...al function declared using the following syntax:
class A
{
virtual void foo() = 0;
};
An abstract base class cannot be instantiated, i. e. you cannot declare an object of class A. You can only derive classes from A, but any derived class that does not provide an implementation of foo() will als...
unsigned int vs. size_t
...ue bigger than 4G. Most compilers would reject e.g. typedef unsigned char foo[1000000000000LL][1000000000000LL], and even foo[65536][65536]; could be legitimately rejected if it exceeded a documented implementation-defined limit.
–
Class with Object as a parameter
...ake of backward-compatibility.)
In general, in a statement such as
class Foo(Base1, Base2):
Foo is being declared as a class inheriting from base classes Base1 and Base2.
object is the mother of all classes in Python. It is a new-style class, so inheriting from object makes Table a new-style cl...
What is the Python equivalent of Matlab's tic and toc functions?
...time() - self.tstart))
It can be used as a context manager:
with Timer('foo_stuff'):
# do some foo
# do some stuff
Sometimes I find this technique more convenient than timeit - it all depends on what you want to measure.
...
Ensuring json keys are lowercase in .NET
... used like this:
var json = LowercaseJsonSerializer.SerializeObject(new { Foo = "bar" });
// { "foo": "bar" }
ASP.NET MVC4 / WebAPI
If you are using ASP.NET MVC4 / WebAPI, you can use a CamelCasePropertyNamesContractResolver from Newtonsoft.Json library which included by default.
...
What is the difference between char array and char pointer in C?
...; // => 5
printf("%zu\n", strlen(q)); // => 5
return 0;
}
foo* and foo[] are different types and they are handled differently by the compiler (pointer = address + representation of the pointer's type, array = pointer + optional length of the array, if known, for example, if the arra...
Effect of a Bitwise Operator on a Boolean in Java
... logic is non-short-circuiting, so the second part is evaluated. So a || x.foo() is safe if x is null, but a | x.foo() is not. |= follows the same rules as |.
– Michael Smith
May 13 '15 at 1:28
...
Extract substring using regexp in plain bash
...
If your string is
foo="US/Central - 10:26 PM (CST)"
then
echo "${foo}" | cut -d ' ' -f3
will do the job.
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How do you remove a Cookie in a Java Servlet
...l still see that cookie passed on the request. E.g. if the url is "http://foo.bar.com/baz/index.html", you'll see any cookies defined on bar.com or foo.bar.com, or with a path of "/" or "/baz".
Thus, what you have looks like it should work, as long as there's only one cookie defined in the client,...