Jan 28, 2010 · A singleton is a class which only allows one instance of itself to be created - and gives simple, easy access to said instance. The singleton premise is a pattern across software …

Apr 9, 2009 · By using this it will provide the tread safety and proper singleton pattern (that is how it is different from a static class). Your code for the singleton were not thread safe.

One example is if the constructor of the singleton allocates memory from the heap and you wish that allocation to be predictable, for instance in an embedded system or other tightly controlled …

The singleton pattern is a fully paid up member of the GoF's patterns book, but it lately seems rather orphaned by the developer world. I still use quite a lot of singletons, especially for factory

Jun 10, 2020 · A singleton is special because its instance is created only once, and a metaclass is the way you customize the creation of a class, allowing it to behave differently than a normal …

When I look at this second example, it is very intuitive how this is a singleton, since the class holds a reference to one instance of itself, and only ever returns that instance.

What is the simplest/cleanest way to implement the singleton pattern in JavaScript?

Feb 6, 2009 · What real (i.e. practical) difference exists between a static class and a singleton pattern? Both can be invoked without instantiation, both provide only one "Instance" and …

Sep 7, 2012 · The pattern you see here is called double-checked locking. Its purpose is to avoid the expensive lock operation which is only going to be needed once (when the singleton is first …

The glorified global variable - becomes a gloried global class. Some say breaking object-oriented design. Give me scenarios, other than the good old logger where it makes sense to use the …