둘러보기 메뉴
검색
바뀐글
임의글
개인 도구
가입하기
로그인
도움말
도움말
질문게시판
자주 묻는 질문
커뮤니티
실시간 채팅방
가입인사게시판
자유게시판
뉴스게시판
제재안게시판
최근 토론
페미위키
공지사항
개선 요청
바뀐글
임의글
파일 올리기
다면 분류 목록
특수 문서 목록
모듈:@en/TableTools 문서 원본 보기
이름공간
모듈
토론
주시
도구
여기를 가리키는 문서
가리키는 글의 최근 바뀜
문서 정보
위키베이스 항목
행위
보기
읽기
원본 보기
역사 보기
←
모듈:@en/TableTools
문서 편집 권한이 없습니다. 다음 이유를 확인해주세요.
요청한 명령은 다음 중 하나의 권한을 가진 사용자에게 제한됩니다:
사용자
,
Seeders
.
문서를 고치려면 이메일 인증 절차가 필요합니다.
사용자 환경 설정
에서 이메일 주소를 입력하고 이메일 주소 인증을 해주시기 바랍니다.
문서의 원본을 보거나 복사할 수 있습니다.
--[[ This module was originally on https://en.wikipedia.org/wiki/Module:TableTools and forked by Legunto (https://github.com/femiwiki/legunto). ]] ------------------------------------------------------------------------------------ -- TableTools -- -- -- -- This module includes a number of functions for dealing with Lua tables. -- -- It is a meta-module, meant to be called from other Lua modules, and should not -- -- be called directly from #invoke. -- ------------------------------------------------------------------------------------ local libraryUtil = require('libraryUtil') local p = {} -- Define often-used variables and functions. local floor = math.floor local infinity = math.huge local checkType = libraryUtil.checkType local checkTypeMulti = libraryUtil.checkTypeMulti ------------------------------------------------------------------------------------ -- isPositiveInteger -- -- This function returns true if the given value is a positive integer, and false -- if not. Although it doesn't operate on tables, it is included here as it is -- useful for determining whether a given table key is in the array part or the -- hash part of a table. ------------------------------------------------------------------------------------ function p.isPositiveInteger(v) return type(v) == 'number' and v >= 1 and floor(v) == v and v < infinity end ------------------------------------------------------------------------------------ -- isNan -- -- This function returns true if the given number is a NaN value, and false if -- not. Although it doesn't operate on tables, it is included here as it is useful -- for determining whether a value can be a valid table key. Lua will generate an -- error if a NaN is used as a table key. ------------------------------------------------------------------------------------ function p.isNan(v) return type(v) == 'number' and v ~= v end ------------------------------------------------------------------------------------ -- shallowClone -- -- This returns a clone of a table. The value returned is a new table, but all -- subtables and functions are shared. Metamethods are respected, but the returned -- table will have no metatable of its own. ------------------------------------------------------------------------------------ function p.shallowClone(t) checkType('shallowClone', 1, t, 'table') local ret = {} for k, v in pairs(t) do ret[k] = v end return ret end ------------------------------------------------------------------------------------ -- removeDuplicates -- -- This removes duplicate values from an array. Non-positive-integer keys are -- ignored. The earliest value is kept, and all subsequent duplicate values are -- removed, but otherwise the array order is unchanged. ------------------------------------------------------------------------------------ function p.removeDuplicates(arr) checkType('removeDuplicates', 1, arr, 'table') local isNan = p.isNan local ret, exists = {}, {} for _, v in ipairs(arr) do if isNan(v) then -- NaNs can't be table keys, and they are also unique, so we don't need to check existence. ret[#ret + 1] = v else if not exists[v] then ret[#ret + 1] = v exists[v] = true end end end return ret end ------------------------------------------------------------------------------------ -- numKeys -- -- This takes a table and returns an array containing the numbers of any numerical -- keys that have non-nil values, sorted in numerical order. ------------------------------------------------------------------------------------ function p.numKeys(t) checkType('numKeys', 1, t, 'table') local isPositiveInteger = p.isPositiveInteger local nums = {} for k in pairs(t) do if isPositiveInteger(k) then nums[#nums + 1] = k end end table.sort(nums) return nums end ------------------------------------------------------------------------------------ -- affixNums -- -- This takes a table and returns an array containing the numbers of keys with the -- specified prefix and suffix. For example, for the table -- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", affixNums will return -- {1, 3, 6}. ------------------------------------------------------------------------------------ function p.affixNums(t, prefix, suffix) checkType('affixNums', 1, t, 'table') checkType('affixNums', 2, prefix, 'string', true) checkType('affixNums', 3, suffix, 'string', true) local function cleanPattern(s) -- Cleans a pattern so that the magic characters ()%.[]*+-?^$ are interpreted literally. return s:gsub('([%(%)%%%.%[%]%*%+%-%?%^%$])', '%%%1') end prefix = prefix or '' suffix = suffix or '' prefix = cleanPattern(prefix) suffix = cleanPattern(suffix) local pattern = '^' .. prefix .. '([1-9]%d*)' .. suffix .. '$' local nums = {} for k in pairs(t) do if type(k) == 'string' then local num = mw.ustring.match(k, pattern) if num then nums[#nums + 1] = tonumber(num) end end end table.sort(nums) return nums end ------------------------------------------------------------------------------------ -- numData -- -- Given a table with keys like {"foo1", "bar1", "foo2", "baz2"}, returns a table -- of subtables in the format -- {[1] = {foo = 'text', bar = 'text'}, [2] = {foo = 'text', baz = 'text'}}. -- Keys that don't end with an integer are stored in a subtable named "other". The -- compress option compresses the table so that it can be iterated over with -- ipairs. ------------------------------------------------------------------------------------ function p.numData(t, compress) checkType('numData', 1, t, 'table') checkType('numData', 2, compress, 'boolean', true) local ret = {} for k, v in pairs(t) do local prefix, num = mw.ustring.match(tostring(k), '^([^0-9]*)([1-9][0-9]*)$') if num then num = tonumber(num) local subtable = ret[num] or {} if prefix == '' then -- Positional parameters match the blank string; put them at the start of the subtable instead. prefix = 1 end subtable[prefix] = v ret[num] = subtable else local subtable = ret.other or {} subtable[k] = v ret.other = subtable end end if compress then local other = ret.other ret = p.compressSparseArray(ret) ret.other = other end return ret end ------------------------------------------------------------------------------------ -- compressSparseArray -- -- This takes an array with one or more nil values, and removes the nil values -- while preserving the order, so that the array can be safely traversed with -- ipairs. ------------------------------------------------------------------------------------ function p.compressSparseArray(t) checkType('compressSparseArray', 1, t, 'table') local ret = {} local nums = p.numKeys(t) for _, num in ipairs(nums) do ret[#ret + 1] = t[num] end return ret end ------------------------------------------------------------------------------------ -- sparseIpairs -- -- This is an iterator for sparse arrays. It can be used like ipairs, but can -- handle nil values. ------------------------------------------------------------------------------------ function p.sparseIpairs(t) checkType('sparseIpairs', 1, t, 'table') local nums = p.numKeys(t) local i = 0 local lim = #nums return function () i = i + 1 if i <= lim then local key = nums[i] return key, t[key] else return nil, nil end end end ------------------------------------------------------------------------------------ -- size -- -- This returns the size of a key/value pair table. It will also work on arrays, -- but for arrays it is more efficient to use the # operator. ------------------------------------------------------------------------------------ function p.size(t) checkType('size', 1, t, 'table') local i = 0 for _ in pairs(t) do i = i + 1 end return i end local function defaultKeySort(item1, item2) -- "number" < "string", so numbers will be sorted before strings. local type1, type2 = type(item1), type(item2) if type1 ~= type2 then return type1 < type2 elseif type1 == 'table' or type1 == 'boolean' or type1 == 'function' then return tostring(item1) < tostring(item2) else return item1 < item2 end end ------------------------------------------------------------------------------------ -- keysToList -- -- Returns an array of the keys in a table, sorted using either a default -- comparison function or a custom keySort function. ------------------------------------------------------------------------------------ function p.keysToList(t, keySort, checked) if not checked then checkType('keysToList', 1, t, 'table') checkTypeMulti('keysToList', 2, keySort, {'function', 'boolean', 'nil'}) end local arr = {} local index = 1 for k in pairs(t) do arr[index] = k index = index + 1 end if keySort ~= false then keySort = type(keySort) == 'function' and keySort or defaultKeySort table.sort(arr, keySort) end return arr end ------------------------------------------------------------------------------------ -- sortedPairs -- -- Iterates through a table, with the keys sorted using the keysToList function. -- If there are only numerical keys, sparseIpairs is probably more efficient. ------------------------------------------------------------------------------------ function p.sortedPairs(t, keySort) checkType('sortedPairs', 1, t, 'table') checkType('sortedPairs', 2, keySort, 'function', true) local arr = p.keysToList(t, keySort, true) local i = 0 return function () i = i + 1 local key = arr[i] if key ~= nil then return key, t[key] else return nil, nil end end end ------------------------------------------------------------------------------------ -- isArray -- -- Returns true if the given value is a table and all keys are consecutive -- integers starting at 1. ------------------------------------------------------------------------------------ function p.isArray(v) if type(v) ~= 'table' then return false end local i = 0 for _ in pairs(v) do i = i + 1 if v[i] == nil then return false end end return true end ------------------------------------------------------------------------------------ -- isArrayLike -- -- Returns true if the given value is iterable and all keys are consecutive -- integers starting at 1. ------------------------------------------------------------------------------------ function p.isArrayLike(v) if not pcall(pairs, v) then return false end local i = 0 for _ in pairs(v) do i = i + 1 if v[i] == nil then return false end end return true end ------------------------------------------------------------------------------------ -- invert -- -- Transposes the keys and values in an array. For example, {"a", "b", "c"} -> -- {a = 1, b = 2, c = 3}. Duplicates are not supported (result values refer to -- the index of the last duplicate) and NaN values are ignored. ------------------------------------------------------------------------------------ function p.invert(arr) checkType("invert", 1, arr, "table") local isNan = p.isNan local map = {} for i, v in ipairs(arr) do if not isNan(v) then map[v] = i end end return map end ------------------------------------------------------------------------------------ -- listToSet -- -- Creates a set from the array part of the table. Indexing the set by any of the -- values of the array returns true. For example, {"a", "b", "c"} -> -- {a = true, b = true, c = true}. NaN values are ignored as Lua considers them -- never equal to any value (including other NaNs or even themselves). ------------------------------------------------------------------------------------ function p.listToSet(arr) checkType("listToSet", 1, arr, "table") local isNan = p.isNan local set = {} for _, v in ipairs(arr) do if not isNan(v) then set[v] = true end end return set end ------------------------------------------------------------------------------------ -- deepCopy -- -- Recursive deep copy function. Preserves identities of subtables. ------------------------------------------------------------------------------------ local function _deepCopy(orig, includeMetatable, already_seen) -- Stores copies of tables indexed by the original table. already_seen = already_seen or {} local copy = already_seen[orig] if copy ~= nil then return copy end if type(orig) == 'table' then copy = {} for orig_key, orig_value in pairs(orig) do copy[_deepCopy(orig_key, includeMetatable, already_seen)] = _deepCopy(orig_value, includeMetatable, already_seen) end already_seen[orig] = copy if includeMetatable then local mt = getmetatable(orig) if mt ~= nil then local mt_copy = _deepCopy(mt, includeMetatable, already_seen) setmetatable(copy, mt_copy) already_seen[mt] = mt_copy end end else -- number, string, boolean, etc copy = orig end return copy end function p.deepCopy(orig, noMetatable, already_seen) checkType("deepCopy", 3, already_seen, "table", true) return _deepCopy(orig, not noMetatable, already_seen) end ------------------------------------------------------------------------------------ -- sparseConcat -- -- Concatenates all values in the table that are indexed by a number, in order. -- sparseConcat{a, nil, c, d} => "acd" -- sparseConcat{nil, b, c, d} => "bcd" ------------------------------------------------------------------------------------ function p.sparseConcat(t, sep, i, j) local arr = {} local arr_i = 0 for _, v in p.sparseIpairs(t) do arr_i = arr_i + 1 arr[arr_i] = v end return table.concat(arr, sep, i, j) end ------------------------------------------------------------------------------------ -- length -- -- Finds the length of an array, or of a quasi-array with keys such as "data1", -- "data2", etc., using an exponential search algorithm. It is similar to the -- operator #, but may return a different value when there are gaps in the array -- portion of the table. Intended to be used on data loaded with mw.loadData. For -- other tables, use #. -- Note: #frame.args in frame object always be set to 0, regardless of the number -- of unnamed template parameters, so use this function for frame.args. ------------------------------------------------------------------------------------ function p.length(t, prefix) -- requiring module inline so that [[Module:Exponential search]] which is -- only needed by this one function doesn't get millions of transclusions local expSearch = require("Module:@en/Exponential search") checkType('length', 1, t, 'table') checkType('length', 2, prefix, 'string', true) return expSearch(function (i) local key if prefix then key = prefix .. tostring(i) else key = i end return t[key] ~= nil end) or 0 end ------------------------------------------------------------------------------------ -- inArray -- -- Returns true if valueToFind is a member of the array, and false otherwise. ------------------------------------------------------------------------------------ function p.inArray(arr, valueToFind) checkType("inArray", 1, arr, "table") -- if valueToFind is nil, error? for _, v in ipairs(arr) do if v == valueToFind then return true end end return false end return p
이 문서에서 사용한 틀:
모듈:@en/TableTools/설명문서
(
원본 보기
)
모듈:@en/TableTools
문서로 돌아갑니다.
다른 언어