Persistent vs Null - What's the difference?
persistent | null |
Obstinately refusing to give up or let go.
* {{quote-news
, year=2011
, date=November 10
, author=Jeremy Wilson
, title= England Under 21 5 Iceland Under 21 0: match report
, work=Telegraph
Insistently repetitive.
Indefinitely continuous.
(botany) Lasting past maturity without falling off.
*
(computing) About some data or data structures: existing after the execution of the program. Remaining in existence past the lifetime of the program that creates it.
(mathematics) Describing a fractal process that has a positive Brown function
(mathematics, stochastic processes, of a state) non-transient.
A non-existent or empty value or set of values.
Zero]] quantity of [[expression, expressions; nothing.
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.
One of the beads in nulled work.
(statistics) null hypothesis
Having no validity, "null and void"
insignificant
* 1924 , Marcel Proust, Within a Budding Grove :
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.
In context|computing|lang=en terms the difference between persistent and null
is that persistent is (computing) about some data or data structures: existing after the execution of the program remaining in existence past the lifetime of the program that creates it while null is (computing) the attribute of an entity that has no valid value.In context|mathematics|lang=en terms the difference between persistent and null
is that persistent is (mathematics) describing a fractal process that has a positive brown function while null is (mathematics) of or comprising a value of precisely zero.As adjectives the difference between persistent and null
is that persistent is obstinately refusing to give up or let go while null is having no validity, "null and void".As a noun null is
a non-existent or empty value or set of values.As a verb null is
to nullify; to annul.persistent
English
Adjective
(en adjective)- She has had a persistent cough for weeks.
citation, page= , passage=The most persistent tormentor was Alex Oxlade-Chamberlain, who scored a hat-trick in last month’s corresponding fixture in Iceland. His ability to run at defences is instantly striking, but it is his clever use of possession that has persuaded some shrewd judges that he is an even better prospect than Theo Walcott.}}
- There was a persistent knocking on the door.
- There have been persistent rumours for years.
- Pine cones have persistent scales.
- The Jubulaceae have a leaf whose lobule, usually transformed into a water-sac, is normally very narrowly attached to the stem and to the dorsal lobe; indeed some Frullania'' taxa reproduce vegetatively by dropping the dorsal lobes, but not the lobules, and ''Neohattoria has caducous lobules but persistent lobes.
- Once written to a disk file the data becomes persistent and it will still be there tomorrow when we run the next program.
- This way transient value becomes persistent .
Anagrams
* ----null
English
Noun
(en noun)- (Francis Bacon)
- Since no date of birth was entered for the patient, his age is null .
Adjective
(en adjective)- 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.
