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  2. Associative array - Wikipedia

    en.wikipedia.org/wiki/Associative_array

    To guarantee a fixed order of enumeration, ordered versions of the associative array are often used. There are two senses of an ordered dictionary: The order of enumeration is always deterministic for a given set of keys by sorting. This is the case for tree-based implementations, one representative being the <map> container of C++. [16]

  3. Comparison of programming languages (associative array)

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

    In C++, the std::map class is templated which allows the data types of keys and values to be different for different map instances. For a given instance of the map class the keys must be of the same base type. The same must be true for all of the values.

  4. Container (abstract data type) - Wikipedia

    en.wikipedia.org/wiki/Container_(abstract_data_type)

    Class substitution Previous three approaches above are used for weakly typed languages; these usually imply inheritance and polymorphism shared by types. Union types (C/C++ language) Permits storing types of different data sizes; it is hard to ensure which type is stored in a union upon retrieval however and should be carefully followed. Type ...

  5. Class (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Class_(computer_programming)

    [26] [27] In C++, an abstract class is a class having at least one abstract method given by the appropriate syntax in that language (a pure virtual function in C++ parlance). [25] A class consisting of only pure virtual methods is called a pure abstract base class (or pure ABC) in C++ and is also known as an interface by users of the language. [13]

  6. Trie - Wikipedia

    en.wikipedia.org/wiki/Trie

    Tries can be represented in several ways, corresponding to different trade-offs between memory use and speed of the operations. [ 5 ] : 341 Using a vector of pointers for representing a trie consumes enormous space; however, memory space can be reduced at the expense of running time if a singly linked list is used for each node vector, as most ...

  7. Factory (object-oriented programming) - Wikipedia

    en.wikipedia.org/wiki/Factory_(object-oriented...

    In class-based programming, a factory is an abstraction of a constructor of a class, while in prototype-based programming a factory is an abstraction of a prototype object. A constructor is concrete in that it creates objects as instances of one class, and by a specified process (class instantiation), while a factory can create objects by instantiating various classes, or by using other ...

  8. Associative containers (C++) - Wikipedia

    en.wikipedia.org/wiki/Associative_containers_(C++)

    In C++, associative containers are a group of class templates in the standard library of the C++ programming language that implement ordered associative arrays. [1] Being templates , they can be used to store arbitrary elements, such as integers or custom classes.

  9. typedef - Wikipedia

    en.wikipedia.org/wiki/Typedef

    typedef is a reserved keyword in the programming languages C, C++, and Objective-C.It is used to create an additional name (alias) for another data type, but does not create a new type, [1] except in the obscure case of a qualified typedef of an array type where the typedef qualifiers are transferred to the array element type. [2]