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  2. Language Integrated Query - Wikipedia

    en.wikipedia.org/wiki/Language_Integrated_Query

    AsEnumerable: Statically types the collection as an IEnumerable<T>. [4] AsQueryable: Statically types the collection as an IQueryable<T>. ToArray: Creates an array T[] from the collection. ToList: Creates a List<T> from the collection. ToDictionary: Creates a Dictionary<K, T> from the collection, indexed by the key K. A user supplied projection ...

  3. Iterator - Wikipedia

    en.wikipedia.org/wiki/Iterator

    In computer programming, an iterator is an object that progressively provides access to each item of a collection, in order. [1] [2] [3]A collection may provide multiple iterators via its interface that provide items in different orders, such as forwards and backwards.

  4. 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})

  5. List (abstract data type) - Wikipedia

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

    A singly-linked list structure, implementing a list with three integer elements. The term list is also used for several concrete data structures that can be used to implement abstract lists, especially linked lists and arrays. In some contexts, such as in Lisp programming, the term list may refer specifically to a linked list rather than an array.

  6. Enumeration - Wikipedia

    en.wikipedia.org/wiki/Enumeration

    When an enumeration is used in an ordered list context, we impose some sort of ordering structure requirement on the index set. While we can make the requirements on the ordering quite lax in order to allow for great generality, the most natural and common prerequisite is that the index set be well-ordered. According to this characterization ...

  7. Wikipedia : Categories, lists, and navigation templates

    en.wikipedia.org/wiki/Wikipedia:Categories...

    For example, several levels of a hierarchy may be included in a list, or the list may have multiple columns, each of which can be a basis for the user to sort the list. Can be built and maintained by editing a single page, whereas filling a category requires the editing of multiple pages. Can be embellished with annotations (further details).

  8. Linked list - Wikipedia

    en.wikipedia.org/wiki/Linked_list

    A linked list is a sequence of nodes that contain two fields: data (an integer value here as an example) and a link to the next node. The last node is linked to a terminator used to signify the end of the list. In computer science, a linked list is a

  9. Comparison of relational database management systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_relational...

    Public issues list 4D (4th Dimension) 4D S.A.S. 1984 v16.0 2017-01-10 [1] Proprietary: No ADABAS: Software AG: 1970 8.1 2013-06 Proprietary: No Adaptive Server Enterprise: SAP AG: 1987 16.0 SP03 PL07 2019-06-10 Proprietary: No Advantage Database Server (ADS) SAP AG: 1992 12.0 2015 Proprietary: No Altibase: Altibase Corp. 2000 7.1.0.1.2 2018-03 ...