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  2. 2–3–4 tree - Wikipedia

    en.wikipedia.org/wiki/2–3–4_tree

    Space. O (n) O (n) In computer science, a 2–3–4 tree (also called a 24 tree) is a self-balancing data structure that can be used to implement dictionaries. The numbers mean a tree where every node with children ( internal node) has either two, three, or four child nodes: a 2-node has one data element, and if internal has two child nodes;

  3. G2A - Wikipedia

    en.wikipedia.org/wiki/G2A

    Users. 30 million (as of 2024) G2A.COM Limited (commonly referred to as G2A) is a digital marketplace headquartered in the Netherlands, [ 1][ 2] with offices in Poland and Hong Kong. [ 3][ 4] The site operates in the resale of gaming offers and others digital items by the use of redemption keys. G2A.COM’s main offerings are game key codes for ...

  4. 2–3 tree - Wikipedia

    en.wikipedia.org/wiki/2–3_tree

    2–3 tree. In computer science, a 2–3 tree is a tree data structure, where every node with children ( internal node) has either two children (2-node) and one data element or three children (3-node) and two data elements. A 2–3 tree is a B-tree of order 3. [ 1] Nodes on the outside of the tree ( leaf nodes) have no children and one or two ...

  5. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    The random nature of standard UUIDs of versions 3, 4, and 5, and the ordering of the fields within standard versions 1 and 2 may create problems with database locality or performance when UUIDs are used as primary keys. For example, in 2002 Jimmy Nilsson reported a significant improvement in performance with Microsoft SQL Server when the ...

  6. Alt code - Wikipedia

    en.wikipedia.org/wiki/Alt_code

    Alt code. On personal computers with numeric keypads that use Microsoft operating systems, such as Windows, many characters that do not have a dedicated key combination on the keyboard may nevertheless be entered using the Alt code (the Alt numpad input method ). This is done by pressing and holding the Alt key, then typing a number on the ...

  7. Functional programming - Wikipedia

    en.wikipedia.org/wiki/Functional_programming

    The distinction between the two is subtle: "higher-order" describes a mathematical concept of functions that operate on other functions, while "first-class" is a computer science term for programming language entities that have no restriction on their use (thus first-class functions can appear anywhere in the program that other first-class ...

  8. Input method - Wikipedia

    en.wikipedia.org/wiki/Input_method

    The term input method generally refers to a particular way to use the keyboard to input a particular language, for example the Cangjie method, the pinyin method, or the use of dead keys. On the other hand, the term input method editor on Microsoft products refers to the actual program that allows an input method to be used (for example MS New ...

  9. List of Java keywords - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_keywords

    List of Java keywords. A snippet of Java code with keywords highlighted in blue and bold font. In the Java programming language, a keyword is any one of 68 reserved words [ 1] that have a predefined meaning in the language. Because of this, programmers cannot use keywords in some contexts, such as names for variables, methods, classes, or as ...