Method AccumLazy

Accumulate on this stream, outputting the new state each time an event fires using a lazily evaluated initial state.

public static Cell<TReturn> AccumLazy<T, TReturn>(this Stream<T> s, Lazy<TReturn> initialState, Func<T, TReturn, TReturn> f)

s Stream<T>: The stream.
initialState Lazy<TReturn>: The lazily evaluated initial state.
f Func<T, TReturn, TReturn>: Function to apply to update the state. It can make FRP logic or use Sample<T>(Cell<T>), and this is then equivalent to snapshotting the cell with Snapshot<T, TResult>(Stream<T>, Cell<TResult>). Apart from this, the function must be pure.