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  2. The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

    A visitor to the island must ask a number of yes/no questions in order to discover what he needs to know (the specifics of which vary between different versions of the puzzle). One version of these puzzles was popularized by a scene in the 1986 fantasy film Labyrinth. There are two doors, each with one guard.

  3. Door problem - Wikipedia

    en.wikipedia.org/wiki/Door_problem

    A door is an example of a complex feature that is seemingly trivial to implement correctly. In the original description of the analogy, Liz England justifies and explains the job requirements of a designer and how complex the job actually is compared to how the requirements are initially posed (making a door). She uses the idea of implementing ...

  4. First-class citizen - Wikipedia

    en.wikipedia.org/wiki/First-class_citizen

    In a given programming language design, a first-class citizen [a] is an entity which supports all the operations generally available to other entities. These operations typically include being passed as an argument , returned from a function , and assigned to a variable .

  5. Programming language - Wikipedia

    en.wikipedia.org/wiki/Programming_language

    This is an accepted version of this page This is the latest accepted revision, reviewed on 29 January 2025. Language for communicating instructions to a machine The source code for a computer program in C. The gray lines are comments that explain the program to humans. When compiled and run, it will give the output "Hello, world!". A programming language is a system of notation for writing ...

  6. Entity–control–boundary - Wikipedia

    en.wikipedia.org/wiki/Entity–control–boundary

    The entity–control–boundary (ECB), or entity–boundary–control (EBC), or boundary–control–entity (BCE) is an architectural pattern used in use-case–driven object-oriented programming that structures the classes composing high-level object-oriented source code according to their responsibilities in the use-case realization.

  7. Duck typing - Wikipedia

    en.wikipedia.org/wiki/Duck_typing

    Duck typing is similar to, but distinct from, structural typing.Structural typing is a static typing system that determines type compatibility and equivalence by a type's structure, whereas duck typing is dynamic and determines type compatibility by only that part of a type's structure that is accessed during runtime.

  8. Entity linking - Wikipedia

    en.wikipedia.org/wiki/Entity_linking

    In natural language processing, Entity Linking, also referred to as named-entity disambiguation (NED), named-entity recognition and disambiguation (NERD), named-entity normalization (NEN), [1] or Concept Recognition, is the task of assigning a unique identity to entities (such as famous individuals, locations, or companies) mentioned in text.

  9. Door space - Wikipedia

    en.wikipedia.org/wiki/Door_space

    Every subspace of a door space is a door space. [2] So is every quotient of a door space. [3] Every topology finer than a door topology on a set is also a door topology. Every discrete space is a door space. These are the spaces without accumulation point, that is, whose every point is an isolated point.