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  2. Method overriding - Wikipedia

    en.wikipedia.org/wiki/Method_overriding

    The implementation in the subclass overrides (replaces) the implementation in the superclass by providing a method that has same name, same parameters or signature, and same return type as the method in the parent class. [2] The version of a method that is executed will be determined by the object that is used to invoke it.

  3. 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]

  4. Concurrency control - Wikipedia

    en.wikipedia.org/wiki/Concurrency_control

    The lost update problem: A second transaction writes a second value of a data-item (datum) on top of a first value written by a first concurrent transaction, and the first value is lost to other transactions running concurrently which need, by their precedence, to read the first value. The transactions that have read the wrong value end with ...

  5. Wikipedia:Browser notes - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Browser_notes

    Wikipedia allows users to create accounts and upload style-sheets (amongst other things) to override/customize the rendering of pages via skins when logged in as that user-account. A style-sheet is required per skin.

  6. Wikipedia:List of policies - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of_policies

    Where a discrepancy exists, the policy page itself overrides. Changing this page does not change policy. Likewise, adding a page to this summary does not elevate it to policy status. Policies are promoted through consensus. See Wikipedia:Policies and guidelines for more.

  7. Evaluation strategy - Wikipedia

    en.wikipedia.org/wiki/Evaluation_strategy

    In a programming language, an evaluation strategy is a set of rules for evaluating expressions. [1] The term is often used to refer to the more specific notion of a parameter-passing strategy [2] that defines the kind of value that is passed to the function for each parameter (the binding strategy) [3] and whether to evaluate the parameters of a function call, and if so in what order (the ...

  8. Read-copy-update - Wikipedia

    en.wikipedia.org/wiki/Read-copy-update

    Read-copy-update insertion procedure. A thread allocates a structure with three fields, then sets the global pointer gptr to point to this structure.. A key property of RCU is that readers can access a data structure even when it is in the process of being updated: RCU updaters cannot block readers or force them to retry their accesses.

  9. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.