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  2. pragma once - Wikipedia

    en.wikipedia.org/wiki/Pragma_once

    Using #pragma once allows the C preprocessor to include a header file when it is needed and to ignore an #include directive otherwise. This has the effect of altering the behavior of the C preprocessor itself, and allows programmers to express file dependencies in a simple fashion, obviating the need for manual management.

  3. 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.

  4. Fatal exception error - Wikipedia

    en.wikipedia.org/wiki/Fatal_exception_error

    This operating-system -related article is a stub. You can help Wikipedia by expanding it.

  5. 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.

  6. 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 ...

  7. Error - Wikipedia

    en.wikipedia.org/wiki/Error

    Download QR code; Print/export Download as PDF; Printable version; In other projects ... One reference differentiates between "error" and "mistake" as follows:

  8. Void Linux - Wikipedia

    en.wikipedia.org/wiki/Void_Linux

    Void Linux [3] is an independent Linux distribution that uses the X Binary Package System (XBPS) package manager, which was designed and implemented from scratch, and the runit init system. Excluding binary kernel blobs , a base install is composed entirely of free software (but users can access an official non-free repository to install ...

  9. List of voids - Wikipedia

    en.wikipedia.org/wiki/List_of_voids

    Name Coordinates Distance Diameter Data Notes Local Void: 18 h 38 m +18° : cz=2500 km/s : 60 Mpc [1]Northern Local Supervoid: 61 Mpc 104 Mpc Virgo Supercluster, Coma Supercluster, Perseus–Pisces Supercluster, Ursa Major–Lynx Supercluster, Hydra–Centaurus Supercluster, Sculptor Supercluster, Pavo–Corona Australes Supercluster form a sheet between the Northern Local Supervoid and the ...