class Reacto::Operations::Last

Public Class Methods

new() click to toggle source
# File lib/reacto/operations/last.rb, line 6
def initialize
  @marker = {}
  @prev = @marker
end

Public Instance Methods

call(tracker) click to toggle source
# File lib/reacto/operations/last.rb, line 11
def call(tracker)
  close = lambda do
    tracker.on_value(@prev) if @prev != @marker
    tracker.on_close
  end
  error = lambda do |e|
    tracker.on_value(@prev) if @prev != @marker
    tracker.on_error(e)
  end

  Subscriptions::OperationSubscription.new(
    tracker,
    value: -> (v) { @prev = v },
    error: error,
    close: close
  )
end