Why is `object` an instance of `type` and `type` an instance of `object`?
36491
What are metaclasses in Python?
99131
What does [object Object] mean? (JavaScript)
109249
Does the default constructor initialize built-in types?
14782
Determining if an Object is of primitive type
1820
What does Java's type parameter wildcard really mean? What's the real difference between Foo and Foo?
112406
Abstract types versus type parameters
127452
Why is typeof null "object"?
106025
Why does `type which` say that `which is hashed`?
17716
What's the difference between primitive and reference types?
29701
Why does instanceof return false for some literals?
139592
What exactly is a type cast in C/C++?
132590
What is the meaning of single and double underscore before an object name?
111570
What is the difference between class and instance methods?
129358
Property vs Instance Variable
62472
How to get the Runtime-Type of an Object dynamically (for Primitive Data Types and SObjects)
86166
Why are my JavaScript object properties being overwritten by other instances?
123115
How do you find out the type of an object (in Swift)?