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class
...class (eigenclass). This allows you to specialise the behaviour of methods called on that specific object.
a = 'foo'
class << a
def inspect
'"bar"'
end
end
a.inspect # => "bar"
a = 'foo' # new object, new singleton class
a.inspect # => "foo"
Now, to answer the questio...
Why are C# interface methods not declared abstract or virtual?
... In C# the class doesn't declare the method as virtual. That means that it cannot be overridden in a derived class (only hidden). In the CIL the method is still virtual (but sealed) because it must support polymorphism regarding the interface type.
class MyClass : MyInterface {
public void Method...
PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...lso known as Unix Millennium Bug, Y2K38 by analogy to the Y2K problem) may cause some computer software to fail before or in the year 2038. The problem affects all software and systems that store system time as a signed 32-bit integer, and interpret this number as the number of seconds since 00:00:0...
Can't pickle when using multiprocessing Pool.map()
... you. Seem to have progressed some way, anyhow: Using the code at pastebin.ca/1693348 I now get a RuntimeError: maximum recursion depth exceeded. I looked around and one forum post recommended increasing the maximum depth to 1500 (from the default 1000) but I had no joy there. To be honest, I can't ...
What does FETCH_HEAD in Git mean?
...ed from the remote repository. git pull first invokes git fetch, in normal cases fetching a branch from the remote; FETCH_HEAD points to the tip of this branch (it stores the SHA1 of the commit, just as branches do). git pull then invokes git merge, merging FETCH_HEAD into the current branch.
The r...
What is the difference between DAO and Repository patterns?
...Data Access Objects (DAO) and Repository patterns? I am developing an application using Enterprise Java Beans (EJB3), Hibernate ORM as infrastructure, and Domain-Driven Design (DDD) and Test-Driven Development (TDD) as design techniques.
...
Drawing an SVG file on a HTML5 canvas
Is there a default way of drawing an SVG file onto a HTML5 canvas? Google Chrome supports loading the SVG as an image (and simply using drawImage ), but the developer console does warn that resource interpreted as image but transferred with MIME type image/svg+xml .
...
LinkedBlockingQueue vs ConcurrentLinkedQueue
...uestion asked earlier. In situations where I am using a queue for communication between producer and consumer threads would people generally recommend using LinkedBlockingQueue or ConcurrentLinkedQueue ?
...
phpunit mock method multiple calls with different arguments
...ts for different input arguments? For example, I have database layer class called DB. This class has method called "Query ( string $query )", that method takes an SQL query string on input. Can I create mock for this class (DB) and set different return values for different Query method calls that de...
Why doesn't Java allow generic subclasses of Throwable?
According to the Java Language Sepecification , 3rd edition:
5 Answers
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