setVariable: Difference between revisions

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(Fix description - nil -removal- is not supported on objects. on purpose? nobody knows)
(Add scripted location difference)
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|descr= Set variable to given value in the variable space of given element. Can be used to broadcast variables over the network.<br>
|descr= Set variable to given value in the variable space of given element. Can be used to broadcast variables over the network.<br>
To remove a variable, set it to [[nil]] (see {{Link|#Example 5}}) - note that this does not work the same on [[Object]] namespaces (the variable will be set to [[nil]] but will not be removed and will remain listed by [[allVariables]]).
To remove a variable, set it to [[nil]] (see {{Link|#Example 5}}) - note that this does not work on [[Object]] and [[createLocation|scripted]] [[Location]] namespaces (the variable will be set to [[nil]] but will remain listed by [[allVariables]]).


{{Feature|warning|
{{Feature|warning|
[[missionNamespace]], [[uiNamespace]], [[parsingNamespace]] and [[profileNamespace]] variables '''cannot''' be named as commands - e.g <sqf inline>missionNamespace setVariable ["west", 123];</sqf> will result in a {{hl|Reserved variable in expression}} error, [[west]] being a scripting command (other namespaces do not have such limitation). See also [[:Category:Scripting Commands|all available script commands]].
[[missionNamespace]], [[uiNamespace]], [[parsingNamespace]] and [[profileNamespace]] variables '''cannot''' be named as commands - e.g <sqf inline>missionNamespace setVariable ["west", 123];</sqf> conflicts with the [[west]] command and will result in a {{hl|Reserved variable in expression}} error, [[west]] being a scripting command (other namespaces do not have such limitation).
See also [[:Category:Scripting Commands|all available script commands]].
}}
}}


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* [[Namespace]]
* [[Namespace]]
* [[Object]]
* [[Object]]
** {{GVI|arma3|2.10|size= 0.75}} {{hl|CfgAmmo}} [[Object]]s
** {{Icon|checked}} {{GVI|arma3|2.10|size= 0.75}} {{hl|CfgAmmo}} [[Object]]s (bullets, mines etc)
** {{Icon|unchecked}} {{hl|CfgNonAIVehicles}} [[Object]]s
** {{Icon|unchecked}} {{hl|CfgNonAIVehicles}} [[Object]]s (butterflies, etc)
* [[Group]]
* [[Group]]
* [[Location]] ([[createLocation|scripted ones]] only)
* [[Location]] ({{GVI|arma3|2.10|size= 0.75}} [[createLocation|scripted ones]] only)
* {{GVI|arma2|1.00|size= 0.75}} [[Team Member]]
* {{GVI|arma2|1.00|size= 0.75}} [[Team Member]]
* {{GVI|arma2|1.00|size= 0.75}} [[Task]] - ''value'' will actually be set on the [[Task]]'s [[FSM]] '''if''' it exists.
* {{GVI|arma2|1.00|size= 0.75}} [[Task]] - ''value'' will actually be set on the [[Task]]'s [[FSM]] '''if''' it exists.
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|x4= Get the current value of a variable or, if it is undefined, define it and then get the value:
|x4= Get the current value of a variable or, if it is undefined, define it and then get the value:
<sqf>private _var = missionNamespace getVariable "VarName";
<sqf>
private _var = missionNamespace getVariable "VarName";
if (isNil "_var") then
if (isNil "_var") then
{
{
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missionNamespace setVariable ["VarName", _var];
missionNamespace setVariable ["VarName", _var];
};
};
// _var now contains the current value of the missionNamespace's variable varName</sqf>
// _var now contains the current value of the missionNamespace's variable varName
</sqf>


|x5= Remove {{hl|TAG_myPublicVariable}} from [[missionNamespace]] (globally):
|x5= Remove {{hl|TAG_myPublicVariable}} from [[missionNamespace]] (globally):
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[[setVariable]] now should work on any entity which can be targeted by AI, including soldier and game logic units. This includes most buildings, but not other static objects.
[[setVariable]] now should work on any entity which can be targeted by AI, including soldier and game logic units. This includes most buildings, but not other static objects.
'''Using it with buildings one should be aware the building may be discarded because of streaming'''. In such case the variable space is lost. When used for buildings, the storage should therefore be considered non-reliable.
'''Using it with buildings one should be aware the building may be discarded because of streaming'''. In such case the variable space is lost. When used for buildings, the storage should therefore be considered non-reliable.
|{{User|Suma}}
| {{User|Suma}}
|Talk:setVariable}}
| Talk:setVariable#setVariable local or global in Multiplayer}}
}}
}}



Revision as of 22:16, 11 April 2023

Hover & click on the images for description

Description

Description:
Set variable to given value in the variable space of given element. Can be used to broadcast variables over the network.
To remove a variable, set it to nil (see Example 5) - note that this does not work on Object and scripted Location namespaces (the variable will be set to nil but will remain listed by allVariables).
missionNamespace, uiNamespace, parsingNamespace and profileNamespace variables cannot be named as commands - e.g missionNamespace setVariable ["west", 123]; conflicts with the west command and will result in a Reserved variable in expression error, west being a scripting command (other namespaces do not have such limitation). See also all available script commands.
Groups:
VariablesNamespacesMultiplayer

Syntax

Syntax:
varspace setVariable [name, value, public]
Parameters:
varspace: variable space in which variable can be set. Can be one of:
name: String - variable name (Identifier)
value: Anything - variable value
since Logo A2.png1.00
public - (Optional, default: false) can be one of: This parameter is only available if the varspace parameter is a Namespace, Object or Group. Furthermore, only the following Data Types can be broadcast:
Type Number Boolean Object Group String Text Array Code Nothing (nil) HashMap
Since Logo A0.png1.34 Logo A0.png1.34 Logo A0.png1.34 Logo A0.png1.34 Logo A1 black.png1.00 Logo A1 black.png1.00 Logo A1 black.png1.09 Logo A1 black.png1.09 Arma 3 logo black.png1.26 Arma 3 logo black.png2.02
Return Value:
Nothing

Examples

Example 1:
_myTruck setVariable ["TAG_myPublicVariable", 123, true];
Example 2:
_myTruck setVariable ["TAG_myLocalVariable", ["321", _var], owner driver _myTruck];
Example 3:
missionNamespace setVariable ["TAG_myName", "Brian"]; hint TAG_myName; // hints "Brian"
Example 4:
Get the current value of a variable or, if it is undefined, define it and then get the value:
private _var = missionNamespace getVariable "VarName"; if (isNil "_var") then { _var = 123; missionNamespace setVariable ["VarName", _var]; }; // _var now contains the current value of the missionNamespace's variable varName
Example 5:
Remove TAG_myPublicVariable from missionNamespace (globally):
missionNamespace setVariable ["TAG_myPublicVariable", nil, true];

Additional Information

See also:
getVariable allVariables setFSMVariable

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
Killswitch - c
Posted on Aug 18, 2007 - 09:51 (UTC)
According to Suma, beginning with ArmA version 1.08:
«
« setVariable now should work on any entity which can be targeted by AI, including soldier and game logic units. This includes most buildings, but not other static objects. Using it with buildings one should be aware the building may be discarded because of streaming. In such case the variable space is lost. When used for buildings, the storage should therefore be considered non-reliable. » – Suma (source)
Commy2 - c
Posted on Dec 09, 2015 - 20:18 (UTC)
This command does not work with CfgAmmo or CfgNonAIVehicles objects, like bullets, mines or butterflies.
Leopard20 - c
Posted on Mar 23, 2022 - 08:59 (UTC)
Since Arma 3 logo black.png2.10 setVariable works on CfgAmmo objects (such as bullets, missiles, grenades, mines, etc) as well.