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Why is the Java main method static?
...ic because otherwise there would be ambiguity: which constructor should be called? Especially if your class looks like this:
public class JavaClass{
protected JavaClass(int x){}
public void main(String[] args){
}
}
Should the JVM call new JavaClass(int)? What should it pass for x?
If not...
Effects of changing Django's SECRET_KEY
...s between views.
protect session data and create random session keys to avoid tampering as well.
create random salt for most password hashers
create random passwords if necessary
create itself when using startproject
create CSRF key
In reality a lot of the items listed here use SECRET_KEY through...
What are WSGI and CGI in plain English?
...t into it. Each request results in a specific function in the script being called, with the request environment passed as arguments to the function.
CGI runs the script as a separate process each request and uses environment variables, stdin, and stdout to "communicate" with it.
...
How to detect when an Android app goes to the background and come back to the foreground
...
The onPause() and onResume() methods are called when the application is brought to the background and into the foreground again. However, they are also called when the application is started for the first time and before it is killed. You can read more in Activity.
...
Group by in LINQ
...ant:
var results = from p in persons
group p.car by p.PersonId into g
select new { PersonId = g.Key, Cars = g.ToList() };
Or as a non-query expression:
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { PersonId = key, ...
java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has
...
A common misunderstanding among starters is that they think that the call of a forward(), sendRedirect(), or sendError() would magically exit and "jump" out of the method block, hereby ignoring the remnant of the code. For example:
protected void doXxx() {
if (someCondition) {
send...
Convert JSON to Map
...ou work with Maven project, you will need <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.4</version> </dependency>
– LoBo
Nov 2 '15 a...
Creating a URL in the controller .NET MVC
... answered Mar 31 '09 at 7:09
GidonGidon
16.8k55 gold badges4242 silver badges6363 bronze badges
...
What is Delegate? [closed]
...calcTotalDelegate calcTotal)
{
return calcTotal(amt);
}
And we could call the CalcMyTotal method passing in the delegate method we wanted to use.
double tot1 = CalcMyTotal(100.34, CalcTotalMethod1);
double tot2 = CalcMyTotal(100.34, CalcTotalMethod2);
Console.WriteLine(tot1);
Console.WriteLin...
Python function overloading
...
What you are asking for is called multiple dispatch. See Julia language examples which demonstrates different types of dispatches.
However, before looking at that, we'll first tackle why overloading is not really what you want in python.
Why Not Over...