isNull: Difference between revisions

Revision as of 14:41, 7 April 2019

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Description:

Checks whether the tested item is Null.
Which null type the item has to be equal to depends on the type of game entity tested:

Note: A test via == does not work, because, for example, objNull is not equal to anything, not even to itself. Use isEqualTo.

Groups:

Uncategorised

Syntax:: isNull entity
Parameters:: entity: Object, Control, Display, Group (or Location, Task since ARMA 2 (or Script since Arma 3 1.29.127075))
Return Value:: Boolean

See also:: controlNull displayNull grpNull locationNull objNull taskNull teamMemberNull scriptNull configNull typeName

: Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note

Posted on December 9, 2015 - 11:29 (UTC)
Commy2: isNull does not work with the TEAM_MEMBER type. Use this instead: _tmember isEqualTo teamMemberNull

Posted on December 9, 2015 - 11:38 (UTC)
Commy2: The note in the description does not apply to the CONFIG type, probably due to backwards compatibility.
configNull == configNull -> true

@@ Line 20: / Line 20: @@
 * [[Config]]s -> [[configNull]] (since Arma 3 1.53.133130)
-Note: A test via <nowiki>==</nowiki> does not work, because, for example, [[objNull]] is not equal to anything, not even to itself. Use [[isEqualTo]]. |= Description
+Note: A test via <nowiki>==</nowiki> does not work, because, for example, [[objNull]] is not equal to anything, not even to itself. Use [[isEqualTo]]. |DESCRIPTION=
 ____________________________________________________________________________________________
-| '''isNull''' entity |= Syntax
+| '''isNull''' entity |SYNTAX=
-|p1 = entity: [[Object]], [[Control]], [[Display]], [[Group]] (or [[Location]], [[Task]] since ARMA 2 (or [[Script]] since Arma 3 1.29.127075)) |= Parameter 1
+|p1 = entity: [[Object]], [[Control]], [[Display]], [[Group]] (or [[Location]], [[Task]] since ARMA 2 (or [[Script]] since Arma 3 1.29.127075)) |PARAMETER1=
-| [[Boolean]] |= Return value
+| [[Boolean]] |RETURNVALUE=
 ____________________________________________________________________________________________
 |x1 = <code>[[if]] ([[isNull]] obj) [[then]] {[[hint]] "doesn't exist";};</code>
-| [[controlNull]], [[displayNull]], [[grpNull]], [[locationNull]], [[objNull]], [[taskNull]], [[teamMemberNull]], [[scriptNull]], [[configNull]], [[typeName]]|= See also
+| [[controlNull]], [[displayNull]], [[grpNull]], [[locationNull]], [[objNull]], [[taskNull]], [[teamMemberNull]], [[scriptNull]], [[configNull]], [[typeName]]|SEEALSO=
 }}