How can you determine if a table is empty in Lua?

There are two ways to determine if a table is empty:

Option 1: Approach 1: Utilizing the next() function.

function isEmptyTable(t)
    return next(t) == nil
end

local myTable = {}

print(isEmptyTable(myTable))  -- 输出 true

Option 2: Utilize the # operator.

function isEmptyTable(t)
    return #t == 0
end

local myTable = {}

print(isEmptyTable(myTable))  -- 输出 true

Both methods can be used to determine whether a table is empty, and they work on the same principle. Method one uses the next() function to retrieve the next key-value pair in the table, and if there is no next pair, it indicates the table is empty. Method two uses the # operator to get the length of the table, and if the length is 0, it means the table is empty.