-- Registering librairies
local LC = LibStub('libChat-1.0')
LC:registerName(deleteifnotafriend, "myAddon")
 
local function deleteifnotafriend(channelId, from)
 
    -- will delete all messages wich don't come from a friend
    if (not IsFriend()) return false end
   
   -- if friend, just return from
   return from
 
end

CHAT_SYSTEM.primaryContainer.currentBuffer:Clear()
CHAT_SYSTEM.primaryContainer.currentBuffer:GetMaxHistoryLines()

-- Everything resides in the global table, nothing exists outside of it:
globalTable = {
-- This is directly in the global table
-- These are the funcitons listed one the wiki API page:
   Clear = ...,
-- We can't have another Clear function here, it would just overwrite the first one
-- because its in the same table as the one above (directly in the main table)
   Clear = ...,
 
-- but we could do this:
   CHAT_SYSTEM = {
      primaryContainer = {
         currentBuffer = {
-- Because this one, although technically is still inside of the global table
-- is also inside of the CHAT_SYSTEM, primaryContainer, & currentBuffer
-- tables...it has a different address/location
            Clear = ...,
         ...
         },
      ...
      },
   ...
   },
}

CHAT_SYSTEM.primaryContainer.currentBuffer:Clear()

local myarray = {1,2,3}

function mother(arg1, arg2, arg3)
    daughter(arg1, arg2, arg3)
end
 
function father(anotherarg)
    daughter(anotherarg)
end
 
function daughter(...)
  -- do stuff
end

EVENT_CHAT_MESSAGE_CHANNEL (integer eventCode, integer messageType, string fromName, string text, bool isCustomerService)

--Put this somewhere above and outside the player activated event callback function
local function myChatMessageChannelCallbackFunction(eventCode, messageType, fromName, text)
   if messageType = CHAT_CHANNEL_GUILD1 then
      d("Guild channel 1 message received from " .. fromName .. ": " .. text)
   end
 
   --return false = run the other event callback functions for the same event
   --return true = don#t run the other event callback functions for this event as you tell them by "true":    Everything was done already in this function here
   --The same applies to ZoPreHook() and ZoPreHookHandler() functions
    return false
end
 
--Put this into player activated event callback function
--Register the event for new text messages to check incoming texts at all the chat channels
EVENT_MANAGER:RegisterForEvent("MyAddonName_ChatMessageChannel", EVENT_CHAT_MESSAGE_CHANNEL, myChatMessageChannelCallbackFunction)

local str = ""
for key, value in pairs(table) do
   str = str .. value
end

table = {
  table2 = {
   table3 = {
      booleanIWantToCheck = true,
   }
  }
}
-- If so then you can check it with:
if table.table2.table3.booleanIWantToCheck == true then 
   -- do whatever
end

table = {
  table2 = {
   table3 = { 
      otherBoolean = true
      booleanIWantToCheck = false,
      someString = "hello",
   }
  }
}