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  2. Type introspection - Wikipedia

    en.wikipedia.org/wiki/Type_introspection

    For instance, if it is desirable to determine the actual class of an object (rather than whether it is a member of a particular class), Object.getClass() and Class.getName() can be used: System . out . println ( obj . getClass (). getName ());

  3. Downcasting - Wikipedia

    en.wikipedia.org/wiki/Downcasting

    In the below example, the method objectToString takes an Object parameter which is assumed to be of type String. public static String objectToString ( Object myObject ) { // This will only work when the myObject currently holding value is string. return ( String ) myObject ; } public static void main ( String [] args ) { // This will work since ...

  4. Indexer (programming) - Wikipedia

    en.wikipedia.org/wiki/Indexer_(programming)

    WriteLine ($"{member} is the member number {index} of the {nameof(doeFamily)}");}} In this example, the indexer is used to get the value at the nth position, and then to get the position in the list referenced by its value.

  5. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python supports most object oriented programming (OOP) techniques. It allows polymorphism, not only within a class hierarchy but also by duck typing. Any object can be used for any type, and it will work so long as it has the proper methods and attributes. And everything in Python is an object, including classes, functions, numbers and modules.

  6. Immutable object - Wikipedia

    en.wikipedia.org/wiki/Immutable_object

    In object-oriented (OO) and functional programming, an immutable object (unchangeable [1] object) is an object whose state cannot be modified after it is created. [2] This is in contrast to a mutable object (changeable object), which can be modified after it is created. [ 3 ]

  7. Serialization - Wikipedia

    en.wikipedia.org/wiki/Serialization

    Flow diagram. In computing, serialization (or serialisation, also referred to as pickling in Python) is the process of translating a data structure or object state into a format that can be stored (e.g. files in secondary storage devices, data buffers in primary storage devices) or transmitted (e.g. data streams over computer networks) and reconstructed later (possibly in a different computer ...

  8. C Sharp syntax - Wikipedia

    en.wikipedia.org/wiki/C_Sharp_syntax

    GetHashCode - Gets the number corresponding to the value of the object to support the use of a hash table. GetType - Gets the Type of the current instance. ToString - Creates a human-readable text string that describes an instance of the class. Usually it returns the name of the type.

  9. Iterator - Wikipedia

    en.wikipedia.org/wiki/Iterator

    Some object-oriented languages such as C#, C++ (later versions), Delphi (later versions), Go, Java (later versions), Lua, Perl, Python, Ruby provide an intrinsic way of iterating through the elements of a collection without an explicit iterator. An iterator object may exist, but is not represented in the source code. [4] [6]