What can't a namespace do that a singleton class does?
119077
Singleton: How should it be used
131448
C++ mutex in namespace std does not name a type
104585
How to refer to the outer class in another instance of a non-static inner class?
156233
Why does the set of all singleton sets not exist?
82422
C++ a singleton class with dll
22587
Namespaces without packages
96607
Why doesn't C# support local static variables like C does?
44606
How to properly implement ARC compatible and `alloc init` safe Singleton class?
65204
Why can't enum's constructor access static fields?
9078
Difference between static class and singleton pattern?
62584
What are drawbacks or disadvantages of singleton pattern?
136629
"A namespace cannot directly contain members such as fields or methods"
113556
How is an instance initializer different from a constructor?
124515
Java: Non-static nested classes and instance.super()
145051
Why constructors will always have same name as of class and how they are invoked implicitly?
133544
Is there a way to instantiate a class by name in Java?
152312
IOS Weird compiler error: "expected ']' before ;' using set-ter for NSString constant in singleton