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What is :: (double colon) in Python when subscripting sequences?
... @UmarAsghar n means start. so the list start from nth index. Basically, [start:stop:step]
– harryghgim
Sep 1 at 11:42
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Advantages of using prototype, vs defining methods straight in the constructor? [duplicate]
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Methods that inherit via the prototype chain can be changed universally for all instances, for example:
function Class () {}
Class.prototype.calc = function (a, b) {
return a + b;
}
// Create 2 instances:
var ins1 = new Class(),
ins2 = new Class();
// Test the calc method:
console...
What is the difference between std::array and std::vector? When do you use one over other? [duplicat
...ssic C array. That means its size is fixed at compile time and it will be allocated as a single chunk (e.g. taking space on the stack). The advantage it has is slightly better performance because there is no indirection between the object and the arrayed data.
std::vector is a small class contain...
Move assignment operator and `if (this != &rhs)`
In the assignment operator of a class, you usually need to check if the object being assigned is the invoking object so you don't screw things up:
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Square retrofit server mock for testing
...orking anymore with Retrofit 2.0, here I describe a new way of doing that. All what you need to do now is to add your custom interceptors for OkHttpClient like it is shown below. FakeInterceptor class just overrides intercept method and in the case if application is in DEBUG mode return given JSON. ...
How to check if running as root in a bash script
...by using the root username. Nothing guarantees that the user with ID 0 is called root. It's a very strong convention that is broadly followed but anybody could rename the superuser another name.
I think the best way when using bash is to use $EUID, from the man page:
EUID Expands to the effectiv...
When is it appropriate to use UDP instead of TCP? [closed]
...my favorite questions. UDP is so misunderstood.
In situations where you really want to get a simple answer to another server quickly, UDP works best. In general, you want the answer to be in one response packet, and you are prepared to implement your own protocol for reliability or to resend. DNS i...
Can anonymous class implement interface?
... properties. No other kinds of class members such as methods or events are allowed. An anonymous type cannot be cast to any interface or type except for object.
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How to calculate the number of days between two dates? [duplicate]
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Warning: not all days are 24 hours long. If your date range spans a daylight saving change, you'll lose or gain an hour (typically). Use Math.round() on the result (avoid floor or ceil).
– Mark
Sep 2...
What is the difference between @Inject and @Autowired in Spring Framework? Which one to use under wh
...utowired is Spring's own annotation. @Inject is part of a Java technology called CDI that defines a standard for dependency injection similar to Spring. In a Spring application, the two annotations works the same way as Spring has decided to support some JSR-299 annotations in addition to their own....