Difference between revisions of "getVariable"

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{{Command|= Comments
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{{RV|type=command
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____________________________________________________________________________________________
 
  
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| arma |= Game name
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|game1= arma1
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|version1= 1.00
  
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|1.00|= Game version
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|game2= arma2
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____________________________________________________________________________________________
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|version2= 1.00
  
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| Return the value of variable in the variable space of given object. |= Description
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|game3= arma2oa
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____________________________________________________________________________________________
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|version3= 1.50
  
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| '''''object'' getVariable ''name''''' |= Syntax
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|game4= tkoh
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|version4= 1.00
  
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|p1= object: [[Object]] |= Parameter 1
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|game5= arma3
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|version5= 0.50
  
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|p2= name: [[String]] |= Parameter 2
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|arg= global
  
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| [[Any Value]] |= Return value
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|gr1= Multiplayer
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____________________________________________________________________________________________
 
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|x1= <code>myTruck getVariable "myVariable";</code> |= Example 1
 
  
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| [[setVariable]] |= See also
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|gr2= Variables
  
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|descr= Returns the value of variable in the variable space assigned to various data types.
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All available data types combinations:
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{{{!}} class="wikitable"
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!colspan="2"{{!}}Primary syntax ([[String]]) !! colspan="2"{{!}}Alternative syntax ([[Array]])
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{{!}}-
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{{!}}'''Code'''
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{{!}}'''Since'''
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{{!}}'''Code'''
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{{!}}'''Since'''
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{{!}}-
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{{!}} [[Namespace]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Namespace]] getVariable [[Array]] {{!}}{{!}} {{arma2oa}} v1.60
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{{!}}-
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{{!}} [[Object]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Object]] getVariable [[Array]] {{!}}{{!}} -
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{{!}}-
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{{!}} [[Group]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Group]] getVariable [[Array]] {{!}}{{!}} -
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{{!}}-
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{{!}} [[Team Member]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Team Member]] getVariable [[Array]] {{!}}{{!}} -
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{{!}}-
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{{!}} [[Task]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Task]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.68
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{{!}}-
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{{!}} [[Location]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Location]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.68
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{{!}}-
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{{!}} [[Control]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Control]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.56
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{{!}}-
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{{!}} [[Display]] getVariable [[String]] {{!}}{{!}} {{arma3}} v1.56 {{!}}{{!}} [[Display]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.56
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{{!}}}
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{{Feature | important | When variable is [[setVariable|set]] on a [[Task]], it is not actually set on the task itself, but on the FSM attached to the task.<br>
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If there is no FSM, [[getVariable]] will not work.}}
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{{Feature | arma3 | In the case of Alt Syntax usage in {{arma3}}, ''defaultValue'' will be returned if:
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* Requested variable is either undefined or [[nil]]
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* Variable namespace is null ([[objNull]], [[grpNull]], etc.)}}
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|s1= varspace [[getVariable]] name
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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 in given namespace
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|r1= [[Anything]] or [[Nothing]] if the variable doesn't exist
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|s2= varspace [[getVariable]] [name, defaultValue]
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|p21= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]]
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|p22= name: [[String]] - Variable name in given namespace
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|p23= defaultValue: [[Anything]] - Value to return if variable doesn't exist {{Feature|warning|A dynamic ''defaultValue'' e.g. {{ic|[[random]] 500}} will always be executed, even if the variable is defined.}}
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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>
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|x2= <code>[[private]] _variable = myTruck [[getVariable]] ["myVariable", 50]; {{cc|returns 50 if "myVariable" is not set}}</code>
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|x3=
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<code>[[for]] "_i" [[from]] 0 [[to]] 5 [[do]] {
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_car = [[missionNamespace]] [[getVariable]] ("car" [[valuea_plus_valueb|+]] [[str]] _i);
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_car [[setDamage]] 0;
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};{{cc|Set damage of car0..car5 to 0}}</code>
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|x4= <code>myMissionVar = 2015;
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[[missionNamespace]] [[getVariable]] "myMissionVar"; {{cc|Returns 2015}}</code>
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|x5= 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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[[if]] ([[isNil]] "_var") [[then]]
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{
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[[missionNamespace]] [[setVariable]] ["varName", 123];
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_var = 123;
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};
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{{cc|_var here will contain current value of the variable varName}}</code>
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|seealso= [[setVariable]], [[allVariables]], [[getFSMVariable]]
 
}}
 
}}
  
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<h3 style="display:none">Notes</h3>
 
 
<dl class="command_description">
 
<dl class="command_description">
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<!-- Note Section BEGIN -->
 
  
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<!-- Note Section END -->
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<dt><dt>
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<dd class="notedate">Posted on August 13, 2016 - 17:13 (UTC)</dd>
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<dt class="note">[[User:Ebay|Ebay]]</dt>
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<dd class="note">
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'''NOTE: {{arma2}} only! In {{arma3}} this will return default value:'''
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Warning: the alternative syntax returns undefined when the namespace is an object and that object is null. Example:<br>
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<code>_test = [[objNull]] [[getVariable]] ["test", "0"];
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[[systemChat]] _test;</code>
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Errors because _test is undefined. Tested in {{arma2oa}} 1.63.131129
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</dd>
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<dt><dt>
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<dd class="notedate">Posted on August 31, 2017 - 03:29 (UTC)</dd>
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<dt class="note">[[User:AgentRevolution|AgentRev]]</dt>
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<dd class="note">
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You can do typechecking using [[param]]:
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<code>[[private]] _myVar = [<nowiki/>[[player]] [[getVariable]] "myVar"] [[param]] [0, "", [""]];</code>
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and [[params]]:
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<code><nowiki>[</nowiki>[[player]] [[getVariable]] "myVar"] [[params]] [["_myVar", "", [""]]];</code>
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</dd>
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</dl>
 
</dl>
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<h3 style="display:none">Bottom Section</h3>
 
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[[Category:Scripting Commands|GETVARIABLE]]
 
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[[Category:Scripting Commands ArmA|GETVARIABLE]]
 
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[[Category:Command_Group:_Variables|{{uc:{{PAGENAME}}}}]]
 

Revision as of 01:55, 8 August 2021

Logo A1 black.png1.00Logo A2.png1.00A2 OA Logo.png1.50tkoh logo small.png1.00Arma 3 logo black.png0.50
GAGlobal
Hover & click on the images for description

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)
Code Since Code Since
Namespace getVariable String - Namespace getVariable Array Arma 2: Operation Arrowhead v1.60
Object getVariable String - Object getVariable Array -
Group getVariable String - Group getVariable Array -
Team Member getVariable String - Team Member getVariable Array -
Task getVariable String - Task getVariable Array Arma 3 v1.68
Location getVariable String - Location getVariable Array Arma 3 v1.68
Control getVariable String - Control getVariable Array Arma 3 v1.56
Display getVariable String Arma 3 v1.56 Display getVariable Array Arma 3 v1.56
⚠

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 in given namespace
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 in given namespace
defaultValue: Anything - Value to return if variable doesn't exist
⚠

A dynamic defaultValue e.g. random 500 will always be executed, even if the variable is defined.

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:
for "_i" from 0 to 5 do { _car = missionNamespace getVariable ("car" + str _i); _car setDamage 0; };// Set damage of car0..car5 to 0
Example 4:
myMissionVar = 2015; missionNamespace getVariable "myMissionVar"; // Returns 2015
Example 5:
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
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 namespace is an object and that object is null. Example:
_test = objNull getVariable ["test", "0"]; systemChat _test; Errors because _test is undefined. Tested in Arma 2: Operation Arrowhead 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", "", [""]]];
Retrieved from "https://community.bistudio.com/wiki?title=getVariable&oldid=292439"