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  2. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  3. Comparison of programming languages (associative array)

    en.wikipedia.org/wiki/Comparison_of_programming...

    The relatively new System.Collections.Immutable package, available in .NET Framework versions 4.5 and above, and in all versions of .NET Core, also includes the System.Collections.Immutable.Dictionary<TKey, TValue> type, which is implemented using an AVL tree. The methods that would normally mutate the object in-place instead return a new ...

  4. Python (programming language) - Wikipedia

    en.wikipedia.org/wiki/Python_(programming_language)

    Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. [33] Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional ...

  5. Covariance and contravariance (computer science) - Wikipedia

    en.wikipedia.org/wiki/Covariance_and_contra...

    Because fields in C# classes are always mutable, variantly parameterized classes in C# would not be very useful. But languages which emphasize immutable data can make good use of covariant data types. For example, in all of Scala, Kotlin and OCaml the immutable list type is covariant: List [Cat] is a subtype of List [Animal].

  6. Immutable object - Wikipedia

    en.wikipedia.org/wiki/Immutable_object

    Making a shallow copy of a const or immutable value removes the outer layer of immutability: Copying an immutable string (immutable(char[])) returns a string (immutable(char)[]). The immutable pointer and length are being copied and the copies are mutable. The referred data has not been copied and keeps its qualifier, in the example immutable.

  7. Mom Faces Backlash After Taking Down Christmas Tree ... - AOL

    www.aol.com/mom-faces-backlash-taking-down...

    "Take my Christmas tree down with me because there's no point my kids don't have anything to open under my tree for Christmas morning," the TikTok video begins, showing the mom disassembling the tree.

  8. Dick Van Dyke, 99, proves he doesn't skip leg day in new video

    www.aol.com/dick-van-dyke-99-proves-032538917.html

    See the video and how fans reacted. Dick Van Dyke, 99, shared a video on his Instagram of him hitting the gym and tackling leg day. See the video and how fans reacted.

  9. Family of Missouri teen who fell to death on FreeFall ride in ...

    www.aol.com/family-missouri-teen-fell-death...

    The same ride can be found at Dollywood in Tennessee, only theirs has seat belts, Hilliard told USA TODAY. He said things went wrong once the teenager got to the top of the ride and the drop set in.