Extends

• FeatureExtractor

Methods

createDelta(newGrid) → {Array.<object>|null}

src/DeltaFeatureExtractor.js, line 30

Creates a difference map between the current Grid and the previous one. Typically triggered by an event and not called directly.

Parameters:

Name	Type	Description
newGrid	Grid	The current grid.

Returns:

Array.<object> | null -

Returns the output of Grid.diff. Returns 'null' if this is the first event or if there was no difference between Grids.

listen(sourceName)

lib/FeatureExtractor.js, line 32

Listens for data events from another Component

Parameters:

Name	Type	Description
sourceName	string	The name of the component to listen to

Overrides:

• FeatureExtractor#listen

sendEvent(type, data)

lib/Component.js, line 43

Emits an event using the specified eventClass

Parameters:

Name	Type	Description
type	string	The event type to emit
data	*	The data to emit

Overrides:

• FeatureExtractor#sendEvent