====== getAllPlayers ======

----

  * Parameters and types:
     * alive: numberplayer status (0 means dead, 1 means alive, default -1 means all players)
  * Return value and type:
    * code: numberSuccess (ErrorCode.OK) ErrorCode
     * num: numberGet the number
     * list: tableobject objid group
  * The main function of this method: Get all players
  * The specific use cases are as follows:

<code>
--Get the list of all players in the current archive
--Parameters: -1 all players 0 dead players 1 alive players
local result,num,array=World:getAllPlayers(-1)
--Display the number in the chat box
Chat:sendSystemMsg("There are a total of "..num.." players in the current archive")
--Display the list in the chat box
for i,a in ipairs(array) do
Chat:sendSystemMsg("The first "..i..": "..a)
end
</code>