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What is an efficient way to implement a singleton pattern in Java? [closed]
...erializable Singleton
public enum Elvis {
INSTANCE;
private final String[] favoriteSongs =
{ "Hound Dog", "Heartbreak Hotel" };
public void printFavorites() {
System.out.println(Arrays.toString(favoriteSongs));
}
}
Edit: An online portion of "Effective Java" says:...
MySQL vs MongoDB 1000 reads
...
admittedly, i was too surly; it was that html string concat of "<br>" that really 'urghed' me out. you don't need pretty print in tests. even iterating it seems like a php test and not a database test. overall, that AQLDatabase 'possibly/maybe' moment... more ingre...
What's the difference between size_t and int in C++?
...t is unsigned. Many stdlib functions, including malloc, sizeof and various string operation functions use size_t as a datatype.
An int is signed by default, and even though its size is also platform dependant, it will be a fixed 32bits on most modern machine (and though size_t is 64 bits on 64-bits...
Efficiently convert rows to columns in sql server
...######################
--###| Step 2 - Preparing lists of column groups as strings:
--#######################################################################################################################
DECLARE @ColumnName nvarchar(128)
DECLARE @Destiny ...
How to start two threads at “exactly” the same time
...CountDownLatch;
public class ThreadExample
{
public static void main(String[] args)
{
CountDownLatch latch = new CountDownLatch(1);
MyThread t1 = new MyThread(latch);
MyThread t2 = new MyThread(latch);
new Thread(t1).start();
new Thread(t2).start();...
How to create the perfect OOP application [closed]
...e a kind of Item
Items may be Imported Goods
An Item has a Name which is a String
An Item has a Shelf Price which is a Decimal. (Note: does an item really have a price? two identical washing machines might be for sale for different prices at different stores, or at the same store at different times....
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...wercase, and even UPPERCASE (which may occur in comments) versions
of your strings.
It's best to search for plural versions first, then singular. That
way if you have an irregular plural - such as in my merchants ::
businesses example - you can get all the irregular plurals correct.
Otherwise you ma...
Understanding prototypal inheritance in JavaScript
...r.prototype.constructor === Car, but it is equally true for Array, Object, String, ...etc.
But if you reassign a different object to prototype, that invariance is broken. Usually this is not a problem (as you have noticed), but it is better to reinstate it, because it answers the question "Which c...
What is Rack middleware?
...of them will do. Let's create a simple web application that returns a JSON string. For this we'll create a file called config.ru. The config.ru will automatically be called by the rack gem's command rackup which will simply run the contents of the config.ru in a rack-compliant webserver. So let's ad...
What does the star operator mean, in a function call?
...e for any beginning programmer. In Python, a beginner can write def printf(string_template, *args) and move on.
– IceArdor
Nov 20 '13 at 7:38
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