isNull: Difference between revisions

Revision as of 11:34, 17 June 2022

1.00

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Description

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:

Type	Object	Group	Control	Display	Location	Task	Script	Config	Diary Record
Null value	objNull	grpNull	controlNull	displayNull	locationNull	taskNull	scriptNull	configNull	diaryRecordNull
Since	1.00	1.00	1.00	1.00	1.00	1.00	1.30	1.54	2.00

⚠

A test via == does not work, because a null value is not equal to anything, not even itself (configNull being the exception). See also isEqualTo.

Problems:

teamMemberNull for Team Member type is not supported before Arma 3 v2.10.149569. Use private _isNull = _teamMember isEqualTo teamMemberNull instead.

Groups:

Variables

Syntax

Syntax:: isNull entity
Parameters:: entity: Object, Control, Display, Group, Location, Task, Script, Config or Diary Record
Return Value:: Boolean

Examples

Example 1:: if (isNull obj) then {hint "doesn't exist";};

Additional Information

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

Notes

: 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

@@ Line 67: / Line 67: @@
 See also [[isEqualTo]].}}
-|pr= [[teamMemberNull]] for [[Team Member]] type is '''not''' supported. Use {{ic|[[private]] _isNull {{=}} _teamMember [[isEqualTo]] [[teamMemberNull]]}} instead.
+|pr= [[teamMemberNull]] for [[Team Member]] type is '''not''' supported '''before Arma 3 v2.10.149569'''. Use {{ic|[[private]] _isNull {{=}} _teamMember [[isEqualTo]] [[teamMemberNull]]}} instead.
 |s1= [[isNull]] entity