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Event vs Null - What's the difference?

event | null |

In computing terms the difference between event and null

is that event is a possible action that the user can perform that is monitored by an application or the operating system (event listener). When an event occurs an event handler is called which performs a specific task while null is the attribute of an entity that has no valid value.

As nouns the difference between event and null

is that event is an occurrence; something that happens while null is a non-existent or empty value or set of values.

As an adjective null is

having no validity, "null and void.

As a verb null is

to nullify; to annul.

event

English

(wikipedia event)

Noun

(en noun)
  • An occurrence; something that happens.
  • * Macaulay
  • the events of his early years
  • An end result; an outcome (now chiefly in phrases).
  • *, II.3.3:
  • hard beginnings have many times prosperous events  […].
  • * 1707 , , by Eccles and Congrieve; scene 8
  • Of my ill boding Dream / Behold the dire Event .
  • * Young
  • dark doubts between the promise and event
    In the event , he turned out to have what I needed anyway.
  • (physics) A point in spacetime having three spatial coordinates and one temporal coordinate.
  • (computing) A possible action that the user can perform that is monitored by an application or the operating system (event listener). When an event occurs an event handler is called which performs a specific task.
  • (probability theory) A set of some of the possible outcomes; a subset of the sample space.
  • If X is a random variable representing the toss of a six-sided die, then its sample space could be denoted as {1,2,3,4,5,6}. Examples of events could be: X = 1, X = 2, X \ge 5, X \not = 4, and X \isin \{1,3,5\}.
  • (obsolete) An affair in hand; business; enterprise.
  • * Shakespeare
  • Leave we him to his events .
  • (lb) An episode of severe health conditions.
  • Derived terms

    * blessed event * credit event * current events * doomsday event * eventful * event horizon * eventless * eventual * in the event * K-T extinction event * media event * quick time event * risk event * sentinel event * social event * speciation event * to be wise after the event

    null

    English

    Noun

    (en noun)
  • A non-existent or empty value or set of values.
  • Zero]] quantity of [[expression, expressions; nothing.
  • (Francis Bacon)
  • Something that has no force or meaning.
  • (computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
  • (computing) the attribute of an entity that has no valid value.
  • Since no date of birth was entered for the patient, his age is null .
  • One of the beads in nulled work.
  • (statistics) null hypothesis
  • Adjective

    (en adjective)
  • Having no validity, "null and void"
  • insignificant
  • * 1924 , Marcel Proust, Within a Budding Grove :
  • In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.
  • absent or non-existent
  • (mathematics) of the null set
  • (mathematics) of or comprising a value of precisely zero
  • (genetics, of a mutation) causing a complete loss of gene function, amorphic.
  • Derived terms

    * nullity

    Verb

    (en verb)
  • to nullify; to annul
  • (Milton)

    See also

    * nil ----