AS3 class and class name judgment, acquisition, conversion, etc.

1.is--determines whether an object/class belongs to a category, returns a Boolean value
Example: 123 is number
Return: True
Example: int is Object
Return: True

2.as--determines whether the object/class is in a certain class, returns the object itself successfully, and fails to return null
Example: 123 as UINT
Returns: 123
Example: 123 As String
return: null
Note: In many cases, the compiler automatically makes the as operation when the type does not match
With AS, we can call out code hints without strong conversions.

3.Class (object)--strong conversion, possible loss of data, wide applicability, failure throw error
Example: Int (123.45)
Returns 123

4.typeof--returns the type of the object as a string, not recommended
Example: typeof "Test"
return: "String"

5.instanceof--and is the same, but cannot judge the interface, is not recommended to use

6.getdefinitionbyname--get class by class name

7.getqualifiedclassname--get the Full class name

8.getqualifiedsuperclassname--get the full parent class name

9.constructor gets the class based on the object, needs to be converted to object objects, otherwise the compilation does not pass
Example: Obj1.constructor
return: [Class Object]

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AS3 class and class name judgment, acquisition, conversion, etc.