(send a f & args)
Dispatch an action to an agent. Returns the agent immediately. Subsequently, in a thread from a thread pool, the state of the agent will be set to the value of: (apply action-fn state-of-agent args)
user=> (def my-agent (agent 100))
#'user/my-agent
user=> @my-agent
100
;; Note the following happens asynchronously in a thread
;; pool
user=> (send my-agent + 100)
#<Agent@5afc0f5: 200>
;; Assuming the addition has completed the value will
;; now be updated when we look at it.
user=> @my-agent
200
;; update agent value
user => (def foo (agent 100))
#'user/my-agent
user => @foo
100
;; function get "old value"
user => (send foo (fn [old-foo]
(println old-foo "foo will change")
(+ old-foo 100)))
100 foo will change
#agent[{:status :ready, :val 200} 0x000000]
user => @foo
200