setVariable: Difference between revisions

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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. To remove a variable, set it to [[nil]] (see {{HashLink|#Example 5}}).
|descr= 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 {{HashLink|#Example 5}}).


{{Feature | Warning | [[missionNamespace]], [[uiNamespace]], [[parsingNamespace]] and [[profileNamespace]] variable names can be any string but reserved names such as script commands. For example: {{hl|[[missionNamespace]] setVariable ["west", 123];}} will result in error:
{{Feature|warning|
Error in expression <missionNamespace setVariable ["west", 123];>
[[missionNamespace]], [[uiNamespace]], [[parsingNamespace]] and [[profileNamespace]] variables '''cannot''' be named as commands - e.g {{ic|[[missionNamespace]] setVariable ["west", 123];}} 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]].
Error position: <setVariable ["west", 123];>
Error Reserved variable in expression
as [[west]] is a scripting command. Other varspaces do not have such limitation. See also [[:Category:Scripting Commands|all available script commands]].
}}
}}


|mp= The variable space of the object is '''local to each client''' and '''by default''' changes are not broadcast.
|mp= The variable space of the object is '''local to each client''' and '''by default''' changes are not broadcast - see the ''public'' parameter below.


|s1= varspace [[setVariable]] [name, value, public]
|s1= varspace [[setVariable]] [name, value, public]
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|r1= [[Nothing]]
|r1= [[Nothing]]


|x1= <code>_myTruck [[setVariable]] ["TAG_myPublicVariable", 123, [[true]]];</code>
|x1= <sqf>_myTruck setVariable ["TAG_myPublicVariable", 123, true];</sqf>


|x2= <code>_myTruck [[setVariable]] ["TAG_myLocalVariable", ["321", _var], [[owner]] [[driver]] _myTruck];</code>
|x2= <sqf>_myTruck setVariable ["TAG_myLocalVariable", ["321", _var], owner driver _myTruck];</sqf>


|x3= <code>[[missionNamespace]] [[setVariable]] ["TAG_myName", "Brian"];
|x3= <sqf>missionNamespace setVariable ["TAG_myName", "Brian"];
[[hint]] TAG_myName; {{cc|hints "Brian"}}</code>
hint TAG_myName; // hints "Brian"</sqf>


|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:
<code>[[private]] _var = [[missionNamespace]] [[getVariable]] "VarName";
<sqf>private _var = missionNamespace getVariable "VarName";
[[if]] ([[isNil]] "_var") [[then]] {
if (isNil "_var") then {
_var = 123;
_var = 123;
[[missionNamespace]] [[setVariable]] ["VarName", _var];
missionNamespace setVariable ["VarName", _var];
};
};
{{cc|_var now contains the current value of the [[missionNamespace]] variable varName}}</code>
// _var now contains the current value of the missionNamespace's variable varName</sqf>


|x5= Remove {{hl|TAG_myPublicVariable}} from {{hl|_myTruck}} (globally):
|x5= Remove {{hl|TAG_myPublicVariable}} from {{hl|_myTruck}} (globally):
<code>_myTruck [[setVariable]] ["TAG_myPublicVariable", [[nil]], [[true]]];</code>
<sqf>_myTruck setVariable ["TAG_myPublicVariable", nil, true];</sqf>


|seealso= [[getVariable]] [[allVariables]] [[setFSMVariable]]
|seealso= [[getVariable]] [[allVariables]] [[setFSMVariable]]
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{{Note
{{Note
|user= Killswitch
|user= Killswitch
|timestamp= 200708180951
|timestamp= 20070818095100
|text= 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.
|text= According to {{User|Suma}}, beginning with ArmA version 1.08:
'''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."
{{Feature|quote|[[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.|{{User|Suma}}}}
}}
}}


Line 126: Line 124:
|user= Leopard20
|user= Leopard20
|timestamp= 20220323085950
|timestamp= 20220323085950
|text= Since Arma 3 v2.10 [[setVariable]] works on CfgAmmo objects (such as bullets, missiles, grenades, mines, etc.) as well.
|text= Since {{GVI|arma3|2.10}} [[setVariable]] works on CfgAmmo objects (such as bullets, missiles, grenades, mines, etc) as well.
}}
}}

Revision as of 10:57, 23 March 2022

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).
missionNamespace, uiNamespace, parsingNamespace and profileNamespace variables cannot be named as commands - e.g missionNamespace setVariable ["west", 123]; 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.
Multiplayer:
The variable space of the object is local to each client and by default changes are not broadcast - see the public parameter below.
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 _myTruck (globally):
_myTruck 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
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.