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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    501 Not Implemented The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API). 502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 Service ...

  3. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    If a web server responds with Cache-Control: no-cache then a web browser or other caching system (intermediate proxies) must not use the response to satisfy subsequent requests without first checking with the originating server (this process is called validation). This header field is part of HTTP version 1.1, and is ignored by some caches and ...

  4. Stack Overflow - Wikipedia

    en.wikipedia.org/wiki/Stack_Overflow

    Stack Overflow is written in C# using the ASP.NET MVC (Model–View–Controller) framework, and Microsoft SQL Server for the database [38] and the Dapper object-relational mapper used for data access. [39]

  5. Python Server Pages - Wikipedia

    en.wikipedia.org/wiki/Python_Server_Pages

    Python Server Pages (PSP) is a name used by several different implementations of server-side script engines for creating dynamically-generated web pages by embedding Python in HTML. For example, an implementation of Python Server Pages was released with mod_python 3.1 in 2004. [ 1 ]

  6. Missing data - Wikipedia

    en.wikipedia.org/wiki/Missing_data

    Missing not at random (MNAR) (also known as nonignorable nonresponse) is data that is neither MAR nor MCAR (i.e. the value of the variable that's missing is related to the reason it's missing). [5] To extend the previous example, this would occur if men failed to fill in a depression survey because of their level of depression.

  7. Anomaly detection - Wikipedia

    en.wikipedia.org/wiki/Anomaly_detection

    PyOD is an open-source Python library developed specifically for anomaly detection. [56] scikit-learn is an open-source Python library that contains some algorithms for unsupervised anomaly detection. Wolfram Mathematica provides functionality for unsupervised anomaly detection across multiple data types [57]

  8. Cheating in online games - Wikipedia

    en.wikipedia.org/wiki/Cheating_in_online_games

    This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. Practice of subverting video game rules or mechanics to gain an unfair advantage This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article possibly contains original research. Please ...

  9. WebSocket - Wikipedia

    en.wikipedia.org/wiki/WebSocket

    The protocol accepted by the server, or an empty string if the client did not specify protocols in the WebSocket constructor. ws.extensions: The extensions accepted by the server. ws.readyState: The connection state. It is one of the constants below. Constant: WebSocket.CONNECTING = 0: Waiting opening handshake. [21] [22] WebSocket.OPEN = 1