local Array = local array_constructor
local function load_table_module return require "Module:TableTools"end
-- Copy table library so as not to unexpectedly change the behavior of code that-- uses it.local array_methods = mw.clone(table)
-- Create version of table.sort that returns the table.array_methods.sort = function (t, comp) table.sort(t, comp) return tend
-- ipairs and unpack operate on arrays.array_methods.ipairs = ipairsarray_methods.unpack = unpack
function array_methods:type local mt = getmetatable(self) return type(mt)
function array_methods:adjustIndex(index) index = math.floor(index) if index < 0 then index = #self + index + 1 end return indexend
-- string.sub-style slicing.function array_methods:slice(i, j) if i
"number" then i = self:adjust_index(i) else error("Expected number, got " .. type(i)) end if j
"number" then j = self:adjust_index(j or -1) else error("Expected number, got " .. type(j)) end local new_arr = array_constructor local k = 0 for index = i, j do k = k + 1 new_arr[k] = self[index] end return new_arrend
-- A function to convert string key-table modules such-- as into arrays.-- "from" is a bad name.-- field_for_key supplies the field name in which the-- key will be stored.local function to_array(map, field_for_key) m_table = m_table or load_table_module local arr = local i = 0 for key, val in pairs(map) do i = i + 1 local new_val = m_table.shallowcopy(val) if field_for_key then new_val[field_for_key] = key end arr[i] = new_val end return array_constructor(arr)end
-- Functions from that operate on arrays or sparse arrays.-- List copied from .local operate_on_array =
-- Not all of these operate on arrays.local create_new_array =
-- Functions from that take an array in the second argument.-- They just have to have the argument order reversed to work as methods of the-- array object.local second_argument_is_array =
-- Add aliases for the functions from whose names-- contain "array" or "list", which is redundant, and whose names don't conform-- to the usual camel case.-- The key redirects to the value.local alias_of =
local function get_module_function(key, module, module_name) return module[key] or error("No function named " .. tostring(key) .. " in Module:" .. module_name)end
local function wrap_in_array_constructor(func) return function (...) return array_constructor(func(...)) endend
local function create_array_generating_func(key, module, module_name) return wrap_in_array_constructor(get_module_function(key, module, module_name))end
local function reverse_arguments(func) return function (a, b) return func(b, a, true) endend
local function underscore_to_camel_case(str) if type(str) ~= "string" then return str end str = str:gsub("_(.)", string.upper) return strend
local m_table, m_funlocal Array = Array.__type = "array"function Array:__index(key) if type(key) ~= "string" then return nil end -- Convert underscores to camel case: num_keys -> numKeys. key = underscore_to_camel_case(key) local val = array_methods[key] if val then return val end key = alias_of[key] or key local func m_table = m_table or load_table_module if m_table.contains(operate_on_array, key) then if m_table.contains(create_new_array, key) then func = create_array_generating_func(key, m_table, "table") else func = m_table[key] end elseif m_table.contains(second_argument_is_array, key) then m_fun = m_fun or require "Module:fun" local raw_func = reverse_arguments(get_module_function(key, m_fun, "fun")) if m_table.contains(create_new_array, key) then func = wrap_in_array_constructor(raw_func) else func = raw_func end end if func then array_methods[key] = func return func endend
function Array.__add(a, b) if type(a)
'table' then m_table = m_table or load_table_module local new_arr = array_constructor(m_table.shallowcopy(a)) for _, val in ipairs(b) do new_arr:insert(val) end return new_arr endend
function Array:new(...) local arr if select("#", ...)
"table" then arr = ... local mt = getmetatable(arr) -- If table has been loaded with mw.loadData, copy it to avoid the -- limitations of it being a virtual table. if mt and mt.mw_loadData then m_table = m_table or load_table_module arr = m_table.shallowcopy(arr) end else arr = end return setmetatable(arr, self)end
-- Declared as local above.function array_constructor(...) return Array:new(...)end
local array_generating_funcs = local Array_library_mt = setmetatable(Array, Array_library_mt)
function Array_library_mt:__index(key) key = underscore_to_camel_case(key) key = alias_of[key] or key if array_generating_funcs[key] then return array_generating_funcs[key] end m_table = m_table or load_table_module if m_table.contains(create_new_array, key) then local func = create_array_generating_func(key, m_table, "table") array_generating_funcs[key] = func return func endend
return Array