{
  {type='rows', default={font={size=21}, line_height=25},
    {type='text', font={size=28}, line_height=50,
      {'Lua@{Lua} > tables',
        attrs={
          Lua={target='--lua'},
        }},
    },
    {type='filler', height=15},
    {type='text', "Lua's tables are a versatile way to group data together in ways that make it easy to slice and dice."},
    {type='filler', height=15},
    {type='text', '{} is an empty table value/expression.'},
    {type='filler', height=10},
    {type='text',
        {'h = {11, 12, 13} creates an em@{array}, a table that can be looked up by number em@{keys}.',
         attrs={
          em={font={italic=true}}}}},
    {type='text', '    h[1] is now 11, h[2] is 12 and so on.'},
    {type='filler', height=10},
    {type='text', 'h = {a=34} creates a table that can be looked up by string keys.'},
    {type='text', "    h['a'] is now 34, h['b'] is 35."},
    {type='text', '    You can also shorten constant string keys using periods. h.a is 34, h.b is 35.'},
    {type='filler', height=10},
    {type='text', 'if h is an array. #h is an expression that returns the length of h'},
    {type='text', "    String keys don't count towards the length of an array."},
    {type='text', '    Arrays also stop at the first missing/nil slot. The length of {1, 2, nil, 4} is 2.'},
    {type='filler', height=15},
    {type='text', 'Some useful functions operating on tables:', font_size=28},
    {type='filler', height=15},
    {type='text', 'pairs(h)', font={size=24}},
    {type='text',
        {'    Returns an em@{iterator}, a kind of function, that lets you conveniently loop over all the keys of a table.',
         attrs={
          em={font={italic=true}}}}},
    {type='text', '    For example, this program will print out the contents of a table: for key, value in pairs(h) do print(key, value) end'},
    {type='filler', height=15},
    {type='text', 'Some useful functions operating on arrays:', font_size=28},
    {type='filler', height=15},
    {type='text', 'ipairs(h)', font={size=24}},
    {type='text', "    Returns an iterator that lets you conveniently loop over indexes and elements of an array."},
    {type='text', '    For example, this program will print out the contents of an array: for _, x in ipairs(h) do print(x) end'},
    {type='filler', height=10},
    {type='text', 'table.insert(h, value)', font={size=24}},
    {type='text', '    Appends a value to the end of array h.'},
    {type='filler', height=10},
    {type='text', 'table.insert(h, index, value)', font={size=24}},
    {type='text', '    Inserts a value at index in the middle of array h.'},
    {type='filler', height=10},
    {type='text', 'table.remove(h)', font={size=24}},
    {type='text', '    Removes the value at the final index of array h.'},
    {type='filler', height=10},
    {type='text', 'table.remove(h, index)', font={size=24}},
    {type='text', '    Removes the value at index in the middle of array h, compacting later values up.'},
    {type='filler', height=10},
    {type='text', 'table.sort(h)', font={size=24}},
    {type='text', '    Sorts the elements in array h.'},
    {type='filler', height=10},
    {type='text', 'table.sort(h, f)', font={size=24}},
    {type='text', '    Sorts the elements in array h by a custom comparison function f.'},
    {type='text', '    f needs to accept 2 arguments and return true if the first is less than the second.'},
    {type='filler', height=10},
    {type='text', 'table.reverse(h)', font={size=24}},
    {type='text', '    Flips the order of the elements of array h so the final element becomes the first, etc.'},
    {type='filler', height=10},
    {type='text', 'table.concat(h)', font={size=24}},
    {type='text', '    Appends all the elements of array h into a single string and returns it.'},
    {type='text', '    All the elements must be strings.'},
  }
}