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Equation for testing if a point is inside a circle
If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
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Deleting all records in a database table
How do I delete all records in one of my database tables in a Ruby on Rails app?
7 Answers
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Java 256-bit AES Password-Based Encryption
... location. In a JDK, they should be placed under ${jdk}/jre/lib/security
Based on the problem description, it sounds like the policy files are not correctly installed. Systems can easily have multiple Java runtimes; double-check to make sure that the correct location is being used.
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C++ equivalent of Java's toString?
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You can also do it this way, allowing polymorphism:
class Base {
public:
virtual std::ostream& dump(std::ostream& o) const {
return o << "Base: " << b << "; ";
}
private:
int b;
};
class Derived : public Base {
public:
virtual std::ostream...
Accessing the web page's HTTP Headers in JavaScript
...requests were a standard part of web development way back in 2008 as well -_-
– BlueRaja - Danny Pflughoeft
Feb 3 '12 at 22:02
5
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Why java.lang.Object is not abstract? [duplicate]
Why is the Object class, which is base class of 'em all in Java, not abstract?
14 Answers
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Real World Example of the Strategy Pattern
...oring information: We want the application to store information to the Database, but later it may need to be able to save a file, or make a webcall
Outputting: We need to output X as a plain string, but later may be a CSV, XML, JSON, etc.
Examples
I have a project where the users can assign pro...
Python: Select subset from list based on index set
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How to change package name of an Android Application
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And you might need to change app_name in res->values=>strings.xml
– Deqing
Sep 24 '13 at 9:26
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How can you hide database output in Rails console?
In newer version of Rails, I'm guessing from 3 up, database queries are output to the console. This is useful most of the time, but how can you hide it when you do not want to see it?
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