different between implementation vs vtable

English

Pronunciation

• (UK) IPA^(key): /??mpl?m?n?te??n/
• (US) IPA^(key): /??mpl?m?n?te???n/, IPA^(key): /??mpl?m?n?te???n/
• Rhymes: -e???n

Noun

implementation (countable and uncountable, plural implementations)

1. The process of moving an idea from concept to reality. In business, engineering and other fields, implementation refers to the building process rather than the design process.
2. (electronics) A result of implementing something; a finished product, system or device.

   His implementation works, but it needs some fine-tuning.

Hyponyms

• reference implementation

Translations

References

• implementation on Wikipedia.Wikipedia

English

Etymology

Shortening of virtual method table or virtual function table.

Pronunciation

• (UK) IPA^(key): /?vi?te?b?l/
• Rhymes: -e?b?l

Noun

vtable (plural vtables)

1. (computing, programming) A table of memory pointers to different implementations of a virtual function.
   • 2000, Robert C. Martin, More C++ gems

     This solution allows the Command executor to iterate through a collection of unrelated objects with no vtables and pick out the right method for each one.

   • 2003, John C. Mitchell, Concepts in programming languages

     Note that nonvirtual functions do not appear in a vtable.

   • 2003, Steve Heller, C++: a dialogue: programming with the C++ standard library

     The most likely result will be a crash when the code tries to use a vtable entry that contains random garbage.