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Transfer practice · Return the last item or "Empty". The index depends on the sequence length, not a fixed slot.
v3 · Activity 1 of 1 · tables · arrays · indexing · 9 min Runs here
Use a familiar idea in a different task. Read the changed requirement before running.
Return the last item or "Empty". The index depends on the sequence length, not a fixed slot.
Interface: inventoryInfo(items:{string}) -> {first:string,count:number}
| Input | Expected |
|---|---|
Three items{ "A", "B", "C" } | "C" |
Single item{ "A" } | "A" |
Empty{} | "Empty" |
local items = {"Hammer", "Lamp"}
print(items[1])
print(#items)
return { first = items[1], count = #items }The first item is Hammer and the dense sequence has two elements.
New syntax: {}, [1], #, return { field = value }
A table can store an ordered sequence: {"Hammer", "Lamp"}. The first position is 1, the second is 2. Position 0 is not automatically the first element.
#items gives the length of a dense sequence. Holes make length unreliable, so keep this lesson inventory dense.
A missing index returns nil. An empty sequence has no first item, so the exercise uses the text Empty as its display fallback.
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inventoryInfoitems
first items0 , count items
inventoryInfoThis is a private experiment copy. It does not replace your answer or complete the activity.
These inputs apply when your scratchpad returns the function described by the activity interface.
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