Difference between revisions of "getVariable"

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m (Text replacement - "\[\[Category:[ _]?Scripting[ _]Commands[ _]Armed[ _]Assault(\|.*)]]" to "{{GameCategory|arma1|Scripting Commands}}")
m (Some wiki formatting)
 
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{{Command|Comments=
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{{RV|type=command
____________________________________________________________________________________________
 
  
| arma1 |Game name=
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|game1= arma1
 +
|version1= 1.00
  
|1.00|Game version=
+
|game2= arma2
 +
|version2= 1.00
  
|arg= global |Multiplayer Arguments=
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|game3= arma2oa
 +
|version3= 1.50
  
|gr1= Multiplayer |GROUP1=
+
|game4= tkoh
 +
|version4= 1.00
  
|gr2= Variables |GROUP2=
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|game5= arma3
____________________________________________________________________________________________
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|version5= 0.50
  
| Returns the value of variable in the variable space assigned to various data types.
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|arg= global
 +
 
 +
|gr1= Variables
 +
|gr2= Namespaces
 +
|gr3= Multiplayer
 +
 
 +
|descr= Returns the value of variable in the variable space assigned to various data types.
 
All available data types combinations:
 
All available data types combinations:
{{{!}} class{{=}}"wikitable"
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{{{!}} class="wikitable"
! Primary syntax ([[String]])
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!colspan="2"{{!}}Primary syntax ([[String]]) !! colspan="2"{{!}}Alternative syntax ([[Array]])
! Alternative syntax ([[Array]])
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{{!}}-
 +
{{!}}'''Code'''
 +
{{!}}'''Since'''
 +
{{!}}'''Code'''
 +
{{!}}'''Since'''
 +
{{!}}-
 +
{{!}} [[Namespace]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Namespace]] getVariable [[Array]] {{!}}{{!}} {{arma2oa}} 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]] {{!}}{{!}} {{arma3}} v1.68
 +
{{!}}-
 +
{{!}} [[Location]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Location]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.68
 +
{{!}}-
 +
{{!}} [[Control]] getVariable [[String]] {{!}}{{!}} - {{!}}{{!}} [[Control]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.56
 
{{!}}-
 
{{!}}-
{{!}}
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{{!}} [[Display]] getVariable [[String]] {{!}}{{!}} {{arma3}} v1.56 {{!}}{{!}} [[Display]] getVariable [[Array]] {{!}}{{!}} {{arma3}} v1.56
* [[Namespace]] getVariable [[String]]
 
* [[Object]] getVariable [[String]]
 
* [[Group]] getVariable [[String]]
 
* [[Team_Member]] getVariable [[String]]
 
* [[Task]] getVariable [[String]]
 
* [[Location]] getVariable [[String]]
 
* [[Control]] getVariable [[String]] (since {{arma3}} v1.55.133553)
 
* [[Display]] getVariable [[String]] (since {{arma3}} v1.55.133553)
 
{{!}}
 
* [[Namespace]] getVariable [[Array]] (since {{arma2}} OA v1.60)
 
* [[Object]] getVariable [[Array]]
 
* [[Group]] getVariable [[Array]]
 
* [[Team_Member]] getVariable [[Array]]
 
* [[Task]] getVariable [[Array]] (since {{arma3}} v1.67)
 
* [[Location]] getVariable [[Array]] (since {{arma3}} v1.67)
 
* [[Control]] getVariable [[Array]] (since {{arma3}} v1.55.133553))
 
* [[Display]] getVariable [[Array]] (since {{arma3}} v1.55.133553)
 
 
{{!}}}
 
{{!}}}
  
{{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>
+
{{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>
 
If there is no FSM, [[getVariable]] will not work.}}
 
If there is no FSM, [[getVariable]] will not work.}}
{{Feature|arma3 | In the case of Alt Syntax usage in {{arma3}}, ''defaultValue'' will be returned if:
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{{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]]
* Variable namespace is null ([[objNull]], [[grpNull]], etc.)}} |DESCRIPTION=
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* Variable namespace is null ([[objNull]], [[grpNull]], etc.)}}
____________________________________________________________________________________________
 
  
| varspace [[getVariable]] name |SYNTAX=
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|s1= varspace [[getVariable]] name
  
|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]]
  
|p2= name: [[String]] - variable name that was defined in [[setVariable]] |PARAMETER2=
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|p2= name: [[String]] - Variable name in given namespace
  
| [[Anything]] or [[Nothing]] if the variable doesn't exist |RETURNVALUE=
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|r1= [[Anything]] or [[Nothing]] if the variable doesn't exist
____________________________________________________________________________________________
 
  
|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=
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|p21= varspace: [[Namespace]], [[Object]], [[Display]], [[Control]], [[Group]], [[Location]], [[Task]], [[Team Member]], [[Display]], [[Control]]
  
|p22= name: [[String]] - Variable name that was defined in [[setVariable]] |PARAMETER22=
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|p22= name: [[String]] - Variable name in given namespace
  
|p23= defaultValue: [[Anything]] - Value to return if variable doesn't exist |PARAMETER23=
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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.}}
  
|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.
____________________________________________________________________________________________
 
  
|x1= <code>[[private]] _variable = myTruck [[getVariable]] "myVariable"; {{cc|returns [[nil]] if "myVariable" is not set}}</code> |EXAMPLE1=
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|x1= <sqf>private _variable = myTruck getVariable "myVariable"; // returns nil if "myVariable" is not set</sqf>
  
|x2= <code>[[private]] _variable = myTruck [[getVariable]] ["myVariable", 50]; {{cc|returns 50 if "myVariable" is not set}}</code> |EXAMPLE2=
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|x2= <sqf>private _variable = myTruck getVariable ["myVariable", 50]; // returns 50 if "myVariable" is not set</sqf>
  
|x3= Set damage of car0..car5 to 0:
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|x3=  
<code>[[for]] "_i" [[from]] 0 [[to]] 5 [[do]] {
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<sqf>
_car = [[missionNamespace]] [[getVariable]] ("car" [[valuea_plus_valueb|+]] [[str]] _i);
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for "_i" from 0 to 5 do {
_car [[setDamage]] 0;
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_car = missionNamespace getVariable ("car" + str _i);
};</code> |EXAMPLE3=
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_car setDamage 0;
 +
}; // Set damage of car0..car5 to 0
 +
</sqf>
  
|x4= <code>myMissionVar = 2015;
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|x4= <sqf>myMissionVar = 2015;
[[missionNamespace]] [[getVariable]] "myMissionVar"; {{cc|returns 2015}}</code>|EXAMPLE4=
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missionNamespace getVariable "myMissionVar"; // Returns 2015</sqf>
  
|x5= WARNING when using dynamic default values as they always get evaluated:
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|x5= Get current value of a variable and if it is undefined, define it and get the defined value:
<code>[[missionNamespace]] [[getVariable]] ["var", 123 [[call]] fnc_abc];
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<sqf>
{{cc|fnc_abc is called every [[getVariable]] even if "var" is defined}}</code>|EXAMPLE5=
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private _var = missionNamespace getVariable "varName";
 
+
if (isNil "_var") then
|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";
 
[[if]] ([[isNil]] "_var") [[then]]
 
 
{
 
{
[[missionNamespace]] [[setVariable]] ["varName", 123];  
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missionNamespace setVariable ["varName", 123];
 
_var = 123;
 
_var = 123;
 
};
 
};
{{cc|_var here will contain current value of the variable varName}}</code> |EXAMPLE6=
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// _var here will contain current value of the variable varName
____________________________________________________________________________________________
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</sqf>
  
| [[setVariable]], [[allVariables]], [[getFSMVariable]]|SEEALSO=
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|seealso= [[setVariable]] [[allVariables]] [[getFSMVariable]]
 
}}
 
}}
  
<h3 style="display:none">Notes</h3>
 
 
<dl class="command_description">
 
<dl class="command_description">
<!-- Note Section BEGIN -->
 
  
 +
<dt><dt>
 
<dd class="notedate">Posted on August 13, 2016 - 17:13 (UTC)</dd>
 
<dd class="notedate">Posted on August 13, 2016 - 17:13 (UTC)</dd>
 
<dt class="note">[[User:Ebay|Ebay]]</dt>
 
<dt class="note">[[User:Ebay|Ebay]]</dt>
 
<dd class="note">
 
<dd class="note">
'''NOTE: {{arma2}} ONLY! In {{arma3}} this will return default value:'''
+
'''NOTE: {{arma2}} only! In {{arma3}} this will return default value:'''
Warning: the alternative syntax returns undefined when the varspace is an object and that object is null. Example:<br>
+
Warning: the alternative syntax returns undefined when the namespace is an object and that object is null. Example:<br>
<code>_test = [[objNull]] [[getVariable]] ["test", "0"];
+
<sqf>_test = objNull getVariable ["test", "0"];
[[systemChat]] _test;</code>
+
systemChat _test;</sqf>
Errors because _test is undefined. Tested in A2OA 1.63.131129
+
Errors because _test is undefined. Tested in {{arma2oa}} 1.63.131129
 
</dd>
 
</dd>
  
 +
<dt><dt>
 
<dd class="notedate">Posted on August 31, 2017 - 03:29 (UTC)</dd>
 
<dd class="notedate">Posted on August 31, 2017 - 03:29 (UTC)</dd>
 
<dt class="note">[[User:AgentRevolution|AgentRev]]</dt>
 
<dt class="note">[[User:AgentRevolution|AgentRev]]</dt>
 
<dd class="note">
 
<dd class="note">
 
You can do typechecking using [[param]]:
 
You can do typechecking using [[param]]:
<code>[[private]] _myVar = [<nowiki/>[[player]] [[getVariable]] "myVar"] [[param]] [0, "", [""]];</code>
+
<sqf>private _myVar = [player getVariable "myVar"] param [0, "", [""]];</sqf>
 
and [[params]]:
 
and [[params]]:
<code><nowiki>[</nowiki>[[player]] [[getVariable]] "myVar"] [[params]] [["_myVar", "", [""]]];</code>
+
<sqf>[player getVariable "myVar"] params [["_myVar", "", [""]]];</sqf>
 
</dd>
 
</dd>
  
<!-- Note Section END -->
 
 
</dl>
 
</dl>
 
<h3 style="display:none">Bottom Section</h3>
 
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
 
{{GameCategory|arma1|Scripting Commands}}
 
[[Category:Scripting Commands Arma 2|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands Arma 3|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands Take On Helicopters|{{uc:{{PAGENAME}}}}]]
 
[[Category:Command_Group:_Locations|{{uc:{{PAGENAME}}}}]]
 

Latest revision as of 15:36, 13 May 2022

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:
VariablesNamespacesMultiplayer

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:
setVariable allVariables getFSMVariable

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", "", [""]]];