# cp.rx.Observer

Observers are simple objects that receive values from Observables.

# API Overview

Functions - API calls offered directly by the extension

Constructors - API calls which return an object, typically one that offers API methods

Methods - API calls which can only be made on an object returned by a constructor


Signature	`cp.rx.Observer.is(thing) -> boolean`
Type	Function
Description	Tests if the `thing` is an `Observer`.
Parameters	thing - The thing to test.
Returns	`true` if the thing is an `Observer`, otherwise `false`.
Notes	None
Examples	None
Source	src/extensions/cp/rx/Observer.lua line 14


Signature	`cp.rx.Observer.create(onNext, onError, onCompleted) -> cp.rx.Observer`
Type	Constructor
Description	Creates a new Observer.
Parameters	onNext - Called when the Observable produces a value. onError - Called when the Observable terminates due to an error. onCompleted - Called when the Observable completes normally.
Returns	The new Observer.
Notes	None
Examples	None
Source	src/extensions/cp/rx/Observer.lua line 27


Signature	`cp.rx.Observer:onCompleted() -> nil`
Type	Method
Description	Notify the Observer that the sequence has completed and will produce no more values.
Parameters	None
Returns	Nothing
Notes	None
Examples	None
Source	src/extensions/cp/rx/Observer.lua line 80


Signature	`cp.rx.Observer:onError(message) -> nil`
Type	Method
Description	Notify the Observer that an error has occurred.
Parameters	message - A string describing what went wrong.
Returns	Nothing
Notes	None
Examples	None
Source	src/extensions/cp/rx/Observer.lua line 64


Signature	`cp.rx.Observer:onNext(...) -> nil`
Type	Method
Description	Pushes zero or more values to the Observer.
Parameters	... - The list of values to send.
Returns	Nothing
Notes	None
Examples	None
Source	src/extensions/cp/rx/Observer.lua line 49