In the help part of Quest I'm told that the ScopeVisible() command returns an objectlist of the objects that the player can see.
I'm trying to display the objectlist but no luck so far.

I tried this code:
ll = NewObjectList()
ScopeVisible()
msg (ListCount(ll))
msg(ObjectList)

Let's look at the code line by line:

• ll = NewObjectList() - calls the (built-in) function "NewObjectList", which creates a new objectlist and returns it. The returned (empty) objectlist is stored in a local variable named ll
• ScopeVisible() - calls the (core) function "ScopeVisible", which returns an objectlist of visible objects. There's no =, so we don't do anything with this list.
• msg (ListCount(ll)) - calls the (built-in) function "ListCount", which returns the number of elements in the list ll (currently zero, as ll is the empty list returned by NewObjectList(). The returned number (0) is passed to the built-in statement "msg", and printed out
• msg(ObjectList) - calls the built-in statement "msg", to print out the contents of a local variable named ObjectList. If you haven't already created this variable, you will get an error.

I think what you probably meant is:

ll = ScopeVisible()
msg (ListCount(ll))
msg (FormatList (ll, ", ", ", and", "nothing"))

(In this case, I added the (core) function FormatList, which turns an objectlist into a human-readable string that looks like "my parents, an elephant, and Joe Stalin".
The parameters to this function are:

• ll - the list to display
• ", " - the string which should be used to separate items in the list
• ", and" - the string which should be placed between the last two list elements
• "nothing" - what to display if the list is empty

Thanks mrangel. That works well.

I don't understand why there is a command "ScopeReachableForRoom(room) as the player is only able to reach for objects in the current room and no other room, unless you devide the current room into two parts EastLounge and WestLounge; but then how do you tell Quest that while in the WestLounge you are able to reach for objects in the EastLounge?

I don't understand why there is a command "ScopeReachableForRoom(room) as the player is only able to reach for objects in the current room

It finds objects that would be reachable if the player were in a specific room. In most cases you won't need to use it. The most obvious use I can think of is when you're writing scripts to have an NPC move around the map and do things (either automatically, or with the player telling them what to do). You'd use an expression like ScopeReachableForRoom (npc.parent) to find out what objects the NPC can reach.

Useful to know thanks mrangel