CoffeeScript setTimeout problem

gistfile1.md

When you need to use scalar arguments after function arguments use one of the following approaches:

delayed_ping = (client) ->
  log "delayed_ping"
  setTimeout (c) -> 
               log 'ping'
               c.pingreq {}
             , KEEP_ALIVE_SEC*1000

or

delayed_ping = (client) ->
  log "delayed_ping"
  setTimeout ((c) -> log 'ping'; c.pingreq {}), KEEP_ALIVE_SEC*1000

or

handle_client = (c) -> 
                  log 'ping'
                  c.pingreq {}

delayed_ping = (client) ->
  log "delayed_ping"
  setTimeout handle_client, KEEP_ALIVE_SEC*1000