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forward< Subtype , MappedType > ( source: Observable < any > , matcher: ( ( i: Action < Subtype > ) => i is Action < Subtype > ) | ( ( i: Action < Subtype > ) => boolean ) , sink: ( ( v: MappedType ) => void ) , mapper: ( ( i: Action < Subtype > ) => MappedType ) ) : Subscription
Type Parameters
Subtype
MappedType = Action < Subtype >
Parameters
source: Observable < any >
matcher: ( ( i: Action < Subtype > ) => i is Action < Subtype > ) | ( ( i: Action < Subtype > ) => boolean )
sink: ( ( v: MappedType ) => void )
( v: MappedType ) : void
Returns void
mapper: ( ( i: Action < Subtype > ) => MappedType )
( i: Action < Subtype > ) : MappedType
Returns MappedType
Returns Subscription
Syntactic sugar for a pipe between a source and a sink, in which matching events of the source become calls on the sink, after going through the mapper.
Example