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# Factorio Runtime Docs Version 2.0.77

# LuaDeciderCombinatorControlBehavior - Runtime Docs

## Class LuaDeciderCombinatorControlBehavior extends LuaCombinatorControlBehavior

Control behavior for decider combinators.

Inherits from LuaCombinatorControlBehavior « LuaControlBehavior

## Members

get_condition(index) | → DeciderCombinatorCondition | Gets the condition at `index`.
Gets the condition at `index`.
set_condition(index, condition) |  | Sets the condition at `index`.
Sets the condition at `index`.
add_condition(condition, index?) |  | Adds a new condition.
Adds a new condition.
remove_condition(index) |  | Removes the condition at `index`.
Removes the condition at `index`.
get_output(index) | → DeciderCombinatorOutput | Gets the output at `index`.
Gets the output at `index`.
set_output(index, output) |  | Sets the output at `index`.
Sets the output at `index`.
add_output(output, index?) |  | Adds a new output.
Adds a new output.
remove_output(index) |  | Removes the output at `index`.
Removes the output at `index`.
parameters | :: RW DeciderCombinatorParameters? | This decider combinator's parameters. [...]
This decider combinator's parameters. [...]
valid | :: R boolean | Is this object valid? [...]
Is this object valid? [...]
object_name | :: R string | The class name of this object. [...]
The class name of this object. [...]

Inherited from LuaCombinatorControlBehavior

get_signal_last_tick(signal) | → int32? | Gets the value of a specific signal sent by this combinator behavior last tick or `nil` if the signal didn't exist.
Gets the value of a specific signal sent by this combinator behavior last tick or `nil` if the signal didn't exist.
signals_last_tick | :: R array[Signal] | The circuit network signals sent by this combinator last tick.
The circuit network signals sent by this combinator last tick.

Inherited from LuaControlBehavior

get_circuit_network(wire_connector_id) | → LuaCircuitNetwork? |
type | :: R defines.control_behavior.type | The concrete type of this control behavior.
The concrete type of this control behavior.
entity | :: R LuaEntity | The entity this control behavior belongs to.
The entity this control behavior belongs to.

## Methods

### get_condition(index) → DeciderCombinatorCondition

Gets the condition at `index`.

#### Parameters

index | :: uint32 | Index of condition to get.
Index of condition to get.

### set_condition(index, condition)

Sets the condition at `index`.

#### Parameters

index | :: uint32 | Index of condition to modify.
Index of condition to modify.
condition | :: DeciderCombinatorCondition | Data to set selected condition to.
Data to set selected condition to.

### add_condition(condition, index?)

Adds a new condition.

#### Parameters

condition | :: DeciderCombinatorCondition | New condition to insert.
New condition to insert.
index | :: uint32? | Index to insert new condition at. If not specified, appends to the end.
Index to insert new condition at. If not specified, appends to the end.

### remove_condition(index)

Removes the condition at `index`.

#### Parameters

index | :: uint32 | Index of condition to remove.
Index of condition to remove.

### get_output(index) → DeciderCombinatorOutput

Gets the output at `index`.

#### Parameters

index | :: uint32 | Index of output to get.
Index of output to get.

### set_output(index, output)

Sets the output at `index`.

#### Parameters

index | :: uint32 | Index of output to modify.
Index of output to modify.
output | :: DeciderCombinatorOutput | Data to set selected output to.
Data to set selected output to.

### add_output(output, index?)

Adds a new output.

#### Parameters

output | :: DeciderCombinatorOutput | New output to insert.
New output to insert.
index | :: uint32? | Index to insert new output at. If not specified, appends to the end.
Index to insert new output at. If not specified, appends to the end.

### remove_output(index)

Removes the output at `index`.

#### Parameters

index | :: uint32 | Index of output to remove.
Index of output to remove.

## Attributes

### parameters :: Read|Write DeciderCombinatorParameters?

This decider combinator's parameters. Writing `nil` clears the combinator's parameters.

### valid :: Read boolean

Is this object valid? This Lua object holds a reference to an object within the game engine. It is possible that the game-engine object is removed whilst a mod still holds the corresponding Lua object. If that happens, the object becomes invalid, i.e. this attribute will be `false`. Mods are advised to check for object validity if any change to the game state might have occurred between the creation of the Lua object and its access.

### object_name :: Read string

The class name of this object. Available even when `valid` is false. For LuaStruct objects it may also be suffixed with a dotted path to a member of the struct.