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  2. Undefined value - Wikipedia

    en.wikipedia.org/wiki/Undefined_value

    Safely handling undefined values is important in optimistic concurrency control systems, which detect race conditions after the fact. For example, reading a shared variable protected by seqlock will produce an undefined value before determining that a race condition happened. It will then discard the undefined data and retry the operation.

  3. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  4. JavaScript - Wikipedia

    en.wikipedia.org/wiki/JavaScript

    This is an accepted version of this page This is the latest accepted revision, reviewed on 23 February 2025. High-level programming language Not to be confused with Java (programming language), Javanese script, or ECMAScript. JavaScript Screenshot of JavaScript source code Paradigm Multi-paradigm: event-driven, functional, imperative, procedural, object-oriented Designed by Brendan Eich of ...

  5. Ruby on Rails - Wikipedia

    en.wikipedia.org/wiki/Ruby_on_Rails

    "Don't repeat yourself" means that information is located in a single, unambiguous place. For example, using the ActiveRecord module of Rails, the developer does not need to specify database column names in class definitions. Instead, Ruby on Rails can retrieve this information from the database based on the class name.

  6. Wikipedia:Language learning centre/Word list - Wikipedia

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

    Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency.

  7. Undefined (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Undefined_(mathematics)

    For example, the imaginary number is undefined within the set of real numbers. So it is meaningless to reason about the value, solely within the discourse of real numbers. However, defining the imaginary number i {\displaystyle i} to be equal to − 1 {\displaystyle {\sqrt {-1}}} , allows there to be a consistent set of mathematics referred to ...

  8. List of Super Bowl commercials - Wikipedia

    en.wikipedia.org/wiki/List_of_Super_Bowl_commercials

    The way kids react to the new Chevy SSR causes them to get soap in their mouths. Dodge "Monkey" To get a literal monkey off his back, a man visits his local Dodge dealer and purchases a new Dodge Magnum station wagon. Ford "The One" A Ford GT is shown driven at speed on a racetrack. Credit card MasterCard "Errands"

  9. US signals intelligence in the Cold War - Wikipedia

    en.wikipedia.org/wiki/US_signals_intelligence_in...

    The Air Force and Navy, for example, might duplicate efforts in probing North Korean radars. Air Force RIVET JOINT RC-135 aircraft collected COMINT of interest to all the services. Navy P2 and P3 electronic capabilities also collected data of relevance to the military as a whole.