Difference between revisions of "getVariable"

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m (Text replacement - "\[\[Category:[cC]ommand[_ ][gG]roup:[_ ][^|]+\|\{*uc:{{PAGENAME}*]\]" to "")
m (Text replacement - " *\| *([Cc]omments|COMMENTS|Game|[Gg]ame [Nn]ame|Game [Vv]ersion|Game Version \(number surrounded by NO SPACES\)|Multiplayer Arguments( \("local" or "global"\))?|Effects|Multiplayer Effects( \("local" or "global"\))?|Multiplayer Exe...)
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{{Command|Comments=
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{{Command
  
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| arma1 |Game name=
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| arma1
  
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|1.00|Game version=
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|1.00
  
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|arg= global |Multiplayer Arguments=
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|arg= global
  
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|gr1= Multiplayer |GROUP1=
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|gr1= Multiplayer
  
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|gr2= Variables |GROUP2=
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|gr2= Variables
  
 
| Returns the value of variable in the variable space assigned to various data types.
 
| Returns the value of variable in the variable space assigned to various data types.
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{{Feature|arma3 | In the case of Alt Syntax usage in {{arma3}}, ''defaultValue'' will be returned if:
 
{{Feature|arma3 | In the case of Alt Syntax usage in {{arma3}}, ''defaultValue'' will be returned if:
 
* Requested variable is either undefined or [[nil]]
 
* Requested variable is either undefined or [[nil]]
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* Variable namespace is null ([[objNull]], [[grpNull]], etc.)}} |DESCRIPTION=
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* Variable namespace is null ([[objNull]], [[grpNull]], etc.)}}
  
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| varspace [[getVariable]] name |SYNTAX=
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| varspace [[getVariable]] name
  
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|p1= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]] |PARAMETER1=
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|p1= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]]
  
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|p2= name: [[String]] - variable name that was defined in [[setVariable]] |PARAMETER2=
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|p2= name: [[String]] - variable name that was defined in [[setVariable]]
  
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| [[Anything]] or [[Nothing]] if the variable doesn't exist |RETURNVALUE=
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| [[Anything]] or [[Nothing]] if the variable doesn't exist
  
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|s2= varspace [[getVariable]] [name, defaultValue] |SYNTAX2=
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|s2= varspace [[getVariable]] [name, defaultValue]
  
 
|p21= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]] |PARAMETER21=
 
|p21= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]] |PARAMETER21=
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|p23= defaultValue: [[Anything]] - Value to return if variable doesn't exist |PARAMETER23=
 
|p23= defaultValue: [[Anything]] - Value to return if variable doesn't exist |PARAMETER23=
  
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|r2= [[Anything]] - current value of the variable or ''defaultValue'' if the variable doesn't exist. |RETURNVALUE2=
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|r2= [[Anything]] - current value of the variable or ''defaultValue'' if the variable doesn't exist.
  
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|x1= <code>[[private]] _variable = myTruck [[getVariable]] "myVariable"; {{cc|returns [[nil]] if "myVariable" is not set}}</code> |EXAMPLE1=
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|x1= <code>[[private]] _variable = myTruck [[getVariable]] "myVariable"; {{cc|returns [[nil]] if "myVariable" is not set}}</code>
  
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|x2= <code>[[private]] _variable = myTruck [[getVariable]] ["myVariable", 50]; {{cc|returns 50 if "myVariable" is not set}}</code> |EXAMPLE2=
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|x2= <code>[[private]] _variable = myTruck [[getVariable]] ["myVariable", 50]; {{cc|returns 50 if "myVariable" is not set}}</code>
  
 
|x3= Set damage of car0..car5 to 0:
 
|x3= Set damage of car0..car5 to 0:
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_car = [[missionNamespace]] [[getVariable]] ("car" [[valuea_plus_valueb|+]] [[str]] _i);
 
_car = [[missionNamespace]] [[getVariable]] ("car" [[valuea_plus_valueb|+]] [[str]] _i);
 
_car [[setDamage]] 0;
 
_car [[setDamage]] 0;
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};</code> |EXAMPLE3=
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};</code>
  
 
|x4= <code>myMissionVar = 2015;
 
|x4= <code>myMissionVar = 2015;
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[[missionNamespace]] [[getVariable]] "myMissionVar"; {{cc|returns 2015}}</code>|EXAMPLE4=
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[[missionNamespace]] [[getVariable]] "myMissionVar"; {{cc|returns 2015}}</code>
  
 
|x5= WARNING when using dynamic default values as they always get evaluated:
 
|x5= WARNING when using dynamic default values as they always get evaluated:
 
<code>[[missionNamespace]] [[getVariable]] ["var", 123 [[call]] fnc_abc];
 
<code>[[missionNamespace]] [[getVariable]] ["var", 123 [[call]] fnc_abc];
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{{cc|fnc_abc is called every [[getVariable]] even if "var" is defined}}</code>|EXAMPLE5=
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{{cc|fnc_abc is called every [[getVariable]] even if "var" is defined}}</code>
  
 
|x6= Get current value of a variable and if it is undefined, define it and get the defined value:<code>[[private]] _var = [[missionNamespace]] [[getVariable]] "varName";
 
|x6= Get current value of a variable and if it is undefined, define it and get the defined value:<code>[[private]] _var = [[missionNamespace]] [[getVariable]] "varName";
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_var = 123;
 
_var = 123;
 
};
 
};
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{{cc|_var here will contain current value of the variable varName}}</code> |EXAMPLE6=
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{{cc|_var here will contain current value of the variable varName}}</code>
  
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| [[setVariable]], [[allVariables]], [[getFSMVariable]]|SEEALSO=
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| [[setVariable]], [[allVariables]], [[getFSMVariable]]
 
}}
 
}}
  

Revision as of 01:42, 18 January 2021

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Description

Description:
Returns the value of variable in the variable space assigned to various data types. All available data types combinations:
Primary syntax (String) Alternative syntax (Array)
⚠
When variable is set on a Task, it is not actually set on the task itself, but on the FSM attached to the task.
If there is no FSM, getVariable will not work.
Arma 3
In the case of Alt Syntax usage in Arma 3, defaultValue will be returned if:
  • Requested variable is either undefined or nil
  • Variable namespace is null (objNull, grpNull, etc.)
Groups:
MultiplayerVariables

Syntax

Syntax:
varspace getVariable name
Parameters:
varspace: Namespace, Object, Display, Control, Group, Location, Task, Team Member, Display, Control
name: String - variable name that was defined in setVariable
Return Value:
Anything or Nothing if the variable doesn't exist

Alternative Syntax

Syntax:
varspace getVariable [name, defaultValue]
Parameters:
varspace: Namespace, Object, Display, Control, Group, Location, Task, Team Member, Display, Control
name: String - Variable name that was defined in setVariable
defaultValue: Anything - Value to return if variable doesn't exist
Return Value:
Anything - current value of the variable or defaultValue if the variable doesn't exist.

Examples

Example 1:
private _variable = myTruck getVariable "myVariable"; // returns nil if "myVariable" is not set
Example 2:
private _variable = myTruck getVariable ["myVariable", 50]; // returns 50 if "myVariable" is not set
Example 3:
Set damage of car0..car5 to 0: for "_i" from 0 to 5 do { _car = missionNamespace getVariable ("car" + str _i); _car setDamage 0; };
Example 4:
myMissionVar = 2015; missionNamespace getVariable "myMissionVar"; // returns 2015
Example 5:
WARNING when using dynamic default values as they always get evaluated: missionNamespace getVariable ["var", 123 call fnc_abc]; // fnc_abc is called every getVariable even if "var" is defined
Example 6:
Get current value of a variable and if it is undefined, define it and get the defined value:private _var = missionNamespace getVariable "varName"; if (isNil "_var") then { missionNamespace setVariable ["varName", 123]; _var = 123; }; // _var here will contain current value of the variable varName

Additional Information

See also:
setVariableallVariablesgetFSMVariable

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

Notes

Posted on August 13, 2016 - 17:13 (UTC)
Ebay
NOTE: Arma 2 ONLY! In Arma 3 this will return default value: Warning: the alternative syntax returns undefined when the varspace is an object and that object is null. Example:
_test = objNull getVariable ["test", "0"]; systemChat _test; Errors because _test is undefined. Tested in A2OA 1.63.131129
Posted on August 31, 2017 - 03:29 (UTC)
AgentRev
You can do typechecking using param: private _myVar = [player getVariable "myVar"] param [0, "", [""]]; and params: [player getVariable "myVar"] params [["_myVar", "", [""]]];

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