How to tell if an object has the default value for its type?
8743
Programmatic equivalent of default(Type)
66549
how to get all primitive type of an object
16807
Should I always/ever/never initialize object fields to default values?
82350
Default value on generic predicate as argument
90461
python - returning a default value
19249
Type Checking: typeof, GetType, or is?
149302
Is Java's default value for Boolean 'true'?
28673
How to list the properties of a JavaScript object?
155078
lightning:select - Set default value based on sObject List from apex controller
108666
Iterate over Object Literal Values
77713
Convert variable to type only known at run-time?
93047
How to check whether a variable is a class or not?
127819
How to check whether an object is a date?
27583
Determine if object is integer
32337
Dynamically find the class that represents a primitive Java type
103811
Can I determine if an argument is string literal?
93279
Should I force Python type checking?