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  2. Void type - Wikipedia

    en.wikipedia.org/wiki/Void_type

    Unlike a real unit type which is a singleton, the void type lacks a way to represent its value and the language does not provide any way to declare an object or represent a value with type void. In the earliest versions of C, functions with no specific result defaulted to a return type of int and functions with no arguments simply had empty ...

  3. Arduino - Wikipedia

    en.wikipedia.org/wiki/Arduino

    Arduino (/ ɑː r ˈ d w iː n oʊ /) is an Italian open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices.

  4. Forward declaration - Wikipedia

    en.wikipedia.org/wiki/Forward_declaration

    void printThisInteger (int); In C and C++ , the line above represents a forward declaration of a function and is the function's prototype . After processing this declaration, the compiler would allow the program code to refer to the entity printThisInteger in the rest of the program.

  5. 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.

  6. Weak symbol - Wikipedia

    en.wikipedia.org/wiki/Weak_symbol

    The nm command identifies weak symbols in object files, libraries, and executables. On Linux a weak function symbol is marked with "W" if a weak default definition is available, and with "w" if it is not.

  7. Cache placement policies - Wikipedia

    en.wikipedia.org/wiki/Cache_placement_policies

    Cache placement policies are policies that determine where a particular memory block can be placed when it goes into a CPU cache.A block of memory cannot necessarily be placed at an arbitrary location in the cache; it may be restricted to a particular cache line or a set of cache lines [1] by the cache's placement policy.

  8. List of voids - Wikipedia

    en.wikipedia.org/wiki/List_of_voids

    major void SRSS1 Void 3 (Sculptor Void) 6 3 h 56 m −20° 11′ 56.5 32.0 Eridanus: major void: 7 3 h 17 m −11° 40′ 77.2 25.5 Eridanus: major void: 8 23 h 20 m −12° 32′ 83.9 27.8 Aquarius: major void: 9 3 h 06 m −13° 47′ 114.6 39.0 Eridanus: major void: 10 0 h 26 m −9° 17′ 104.7 34.8 Cetus: major void: 11 0 h 21 m −29 ...

  9. Alternative approaches to redefining the kilogram - Wikipedia

    en.wikipedia.org/wiki/Alternative_approaches_to...

    The International Committee for Weights and Measures (CIPM) approved a redefinition of the SI base units in November 2018 that defines the kilogram by defining the Planck constant to be exactly 6.626 070 15 × 10 −34 kg⋅m 2 ⋅s −1. This approach effectively defines the kilogram in terms of the second and the metre, and took effect on 20 ...