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Wrapper vs Undefined - What's the difference?

wrapper | undefined |

As a noun wrapper

is something that is wrapped around something else as a cover or protection: a wrapping.

As an adjective undefined is

lacking a definition or value.

wrapper

English

Noun

(en noun)
  • Something that is wrapped around something else as a cover or protection: a wrapping.
  • An outer garment; a loose robe or dressing gown.
  • *1839 , (Edgar Allan Poe), ‘William Wilson’:
  • *:‘Please to examine, at your leisure, the inner linings of the cuff of his left sleeve, and the several little packages which may be found in the somewhat capacious pockets of his embroidered morning wrapper .’
  • One who, or that which, wraps.
  • He proved to be a remarkably efficient wrapper of parcels.
  • (computing) A construct, such as a class or module, that serves to mediate access to another.
  • We need a Perl wrapper for this C++ library.

    Synonyms

    * (construct that mediates access) * wrapper class

    Usage notes

    * In the computing sense, is often used attributively: one can speak of a “wrapper class”, a “wrapper object”, a “wrapper function”, and so on. More broadly, one can speak of the “wrapper pattern”, which is a general term for the creation and use of such wrappers.

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
  • The result of division by zero is undefined .

    Antonyms

    * defined