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Available in 23 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-23" aria-hidden="true" > 23 languages </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikibooks.org/wiki/Modul:TableTools" title="Modul:TableTools – Azerbaijani" lang="az" hreflang="az" data-title="Modul:TableTools" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target">Azərbaycanca</a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikibooks.org/wiki/%E0%A6%AE%E0%A6%A1%E0%A6%BF%E0%A6%89%E0%A6%B2:TableTools" title="মডিউল:TableTools – Bangla" lang="bn" hreflang="bn" data-title="মডিউল:TableTools" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target">বাংলা</a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikibooks.org/wiki/Modul:TableTools" title="Modul:TableTools – Czech" lang="cs" hreflang="cs" data-title="Modul:TableTools" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target">Čeština</a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikibooks.org/wiki/M%C3%B3dulo:TableTools" title="Módulo:TableTools – Spanish" lang="es" hreflang="es" data-title="Módulo:TableTools" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target">Español</a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikibooks.org/wiki/%D9%BE%D9%88%D8%AF%D9%85%D8%A7%D9%86:TableTools" title="پودمان:TableTools – Persian" lang="fa" hreflang="fa" data-title="پودمان:TableTools" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target">فارسی</a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikibooks.org/wiki/%E0%A4%AE%E0%A5%89%E0%A4%A1%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%B2:TableTools" title="मॉड्यूल:TableTools – Hindi" lang="hi" hreflang="hi" data-title="मॉड्यूल:TableTools" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target">हिन्दी</a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikibooks.org/wiki/Modul:TableTools" title="Modul:TableTools – Croatian" lang="hr" hreflang="hr" data-title="Modul:TableTools" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target">Hrvatski</a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikibooks.org/wiki/%E3%83%A2%E3%82%B8%E3%83%A5%E3%83%BC%E3%83%AB:TableTools" title="モジュール:TableTools – Japanese" lang="ja" hreflang="ja" data-title="モジュール:TableTools" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target">日本語</a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikibooks.org/wiki/%EB%AA%A8%EB%93%88:TableTools" title="모듈:TableTools – Korean" lang="ko" hreflang="ko" data-title="모듈:TableTools" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target">한국어</a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikibooks.org/wiki/Modulus:TableTools" title="Modulus:TableTools – Latin" lang="la" hreflang="la" data-title="Modulus:TableTools" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target">Latina</a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikibooks.org/wiki/%E0%A4%B5%E0%A4%BF%E0%A4%AD%E0%A4%BE%E0%A4%97:TableTools" title="विभाग:TableTools – Marathi" lang="mr" hreflang="mr" data-title="विभाग:TableTools" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target">मराठी</a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikibooks.org/wiki/Modul:TableTools" title="Modul:TableTools – Malay" lang="ms" hreflang="ms" data-title="Modul:TableTools" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target">Bahasa Melayu</a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikibooks.org/wiki/%E0%A4%AE%E0%A5%8B%E0%A4%A1%E0%A5%8D%E0%A4%AF%E0%A5%81%E0%A4%B2:TableTools" title="मोड्युल:TableTools – Nepali" lang="ne" hreflang="ne" data-title="मोड्युल:TableTools" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target">नेपाली</a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikibooks.org/wiki/%E0%A8%AE%E0%A9%8C%E0%A8%A1%E0%A8%BF%E0%A8%8A%E0%A8%B2:TableTools" title="ਮੌਡਿਊਲ:TableTools – Punjabi" lang="pa" hreflang="pa" data-title="ਮੌਡਿਊਲ:TableTools" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target">ਪੰਜਾਬੀ</a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikibooks.org/wiki/Modu%C5%82:TableTools" title="Moduł:TableTools – Polish" lang="pl" hreflang="pl" data-title="Moduł:TableTools" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target">Polski</a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikibooks.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB%D1%8C:TableTools" title="Модуль:TableTools – Russian" lang="ru" hreflang="ru" data-title="Модуль:TableTools" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target">Русский</a></li><li class="interlanguage-link interwiki-shn mw-list-item"><a href="https://shn.wikibooks.org/wiki/%E1%80%99%E1%80%B1%E1%82%83%E1%82%87%E1%81%B5%E1%80%BB%E1%80%B0%E1%80%B8:TableTools" title="မေႃႇၵျူး:TableTools – Shan" lang="shn" hreflang="shn" data-title="မေႃႇၵျူး:TableTools" data-language-autonym="ၽႃႇသႃႇတႆး " data-language-local-name="Shan" class="interlanguage-link-target">ၽႃႇသႃႇတႆး </a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikibooks.org/wiki/Module:TableTools" title="Module:TableTools – Sinhala" lang="si" hreflang="si" data-title="Module:TableTools" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target">සිංහල</a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikibooks.org/wiki/%E0%B8%A1%E0%B8%AD%E0%B8%94%E0%B8%B9%E0%B8%A5:TableTools" title="มอดูล:TableTools – Thai" lang="th" hreflang="th" data-title="มอดูล:TableTools" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target">ไทย</a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikibooks.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB%D1%8C:TableTools" title="Модуль:TableTools – Tatar" lang="tt" hreflang="tt" data-title="Модуль:TableTools" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target">Татарча / tatarça</a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikibooks.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB%D1%8C:TableTools" title="Модуль:TableTools – Ukrainian" lang="uk" hreflang="uk" data-title="Модуль:TableTools" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target">Українська</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikibooks.org/wiki/M%C3%B4_%C4%91un:TableTools" title="Mô đun:TableTools – Vietnamese" lang="vi" hreflang="vi" 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Editors can experiment in this module's sandbox (<a class="external text" href="https://en.wikibooks.org/w/index.php?title=Module:TableTools/sandbox&action=edit&preload=Template%3ADocumentation%2Fpreload-module-sandbox">create</a> | <a class="external text" href="https://en.wikibooks.org/w/index.php?title=Module:TableTools/sandbox&preload=Module%3ATableTools&action=edit&summary=Create+sandbox+version+of+%5B%5BModule%3ATableTools%5D%5D">mirror</a>) and testcases (<a class="external text" href="https://en.wikibooks.org/w/index.php?title=Module:TableTools/testcases&action=edit&preload=Template%3ADocumentation%2Fpreload-module-testcases">create</a>) pages. Add categories to the <a href="/w/index.php?title=Module:TableTools/doc&action=edit&redlink=1" class="new" title="Module:TableTools/doc (does not exist)">/doc</a> subpage. <a href="/wiki/Special:PrefixIndex/Module:TableTools/" title="Special:PrefixIndex/Module:TableTools/">Subpages of this module</a>.</div></div><div class="mw-highlight mw-highlight-lang-lua mw-content-ltr mw-highlight-lines" dir="ltr"><pre><a href="#L-1"></a>------------------------------------------------------------------------------------ <a href="#L-2"></a>-- TableTools -- <a href="#L-3"></a>-- -- <a href="#L-4"></a>-- This module includes a number of functions for dealing with Lua tables. -- <a href="#L-5"></a>-- It is a meta-module, meant to be called from other Lua modules, and should not -- <a href="#L-6"></a>-- be called directly from #invoke. -- <a href="#L-7"></a>------------------------------------------------------------------------------------ <a href="#L-8"></a> <a href="#L-9"></a>local libraryUtil = require('libraryUtil') <a href="#L-10"></a> <a href="#L-11"></a>local p = {} <a href="#L-12"></a> <a href="#L-13"></a>-- Define often-used variables and functions. <a href="#L-14"></a>local floor = math.floor <a href="#L-15"></a>local infinity = math.huge <a href="#L-16"></a>local checkType = libraryUtil.checkType <a href="#L-17"></a>local checkTypeMulti = libraryUtil.checkTypeMulti <a href="#L-18"></a> <a href="#L-19"></a>------------------------------------------------------------------------------------ <a href="#L-20"></a>-- isPositiveInteger <a href="#L-21"></a>-- <a href="#L-22"></a>-- This function returns true if the given value is a positive integer, and false <a href="#L-23"></a>-- if not. Although it doesn't operate on tables, it is included here as it is <a href="#L-24"></a>-- useful for determining whether a given table key is in the array part or the <a href="#L-25"></a>-- hash part of a table. <a href="#L-26"></a>------------------------------------------------------------------------------------ <a href="#L-27"></a>function p.isPositiveInteger(v) <a href="#L-28"></a> return type(v) == 'number' and v >= 1 and floor(v) == v and v < infinity <a href="#L-29"></a>end <a href="#L-30"></a> <a href="#L-31"></a>------------------------------------------------------------------------------------ <a href="#L-32"></a>-- isNan <a href="#L-33"></a>-- <a href="#L-34"></a>-- This function returns true if the given number is a NaN value, and false if <a href="#L-35"></a>-- not. Although it doesn't operate on tables, it is included here as it is useful <a href="#L-36"></a>-- for determining whether a value can be a valid table key. Lua will generate an <a href="#L-37"></a>-- error if a NaN is used as a table key. <a href="#L-38"></a>------------------------------------------------------------------------------------ <a href="#L-39"></a>function p.isNan(v) <a href="#L-40"></a> return type(v) == 'number' and v ~= v <a href="#L-41"></a>end <a href="#L-42"></a> <a href="#L-43"></a>------------------------------------------------------------------------------------ <a href="#L-44"></a>-- shallowClone <a href="#L-45"></a>-- <a href="#L-46"></a>-- This returns a clone of a table. The value returned is a new table, but all <a href="#L-47"></a>-- subtables and functions are shared. Metamethods are respected, but the returned <a href="#L-48"></a>-- table will have no metatable of its own. <a href="#L-49"></a>------------------------------------------------------------------------------------ <a href="#L-50"></a>function p.shallowClone(t) <a href="#L-51"></a> checkType('shallowClone', 1, t, 'table') <a href="#L-52"></a> local ret = {} <a href="#L-53"></a> for k, v in pairs(t) do <a href="#L-54"></a> ret[k] = v <a href="#L-55"></a> end <a href="#L-56"></a> return ret <a href="#L-57"></a>end <a href="#L-58"></a> <a href="#L-59"></a>------------------------------------------------------------------------------------ <a href="#L-60"></a>-- removeDuplicates <a href="#L-61"></a>-- <a href="#L-62"></a>-- This removes duplicate values from an array. Non-positive-integer keys are <a href="#L-63"></a>-- ignored. The earliest value is kept, and all subsequent duplicate values are <a href="#L-64"></a>-- removed, but otherwise the array order is unchanged. <a href="#L-65"></a>------------------------------------------------------------------------------------ <a href="#L-66"></a>function p.removeDuplicates(arr) <a href="#L-67"></a> checkType('removeDuplicates', 1, arr, 'table') <a href="#L-68"></a> local isNan = p.isNan <a href="#L-69"></a> local ret, exists = {}, {} <a href="#L-70"></a> for _, v in ipairs(arr) do <a href="#L-71"></a> if isNan(v) then <a href="#L-72"></a> -- NaNs can't be table keys, and they are also unique, so we don't need to check existence. <a href="#L-73"></a> ret[#ret + 1] = v <a href="#L-74"></a> else <a href="#L-75"></a> if not exists[v] then <a href="#L-76"></a> ret[#ret + 1] = v <a href="#L-77"></a> exists[v] = true <a href="#L-78"></a> end <a href="#L-79"></a> end <a href="#L-80"></a> end <a href="#L-81"></a> return ret <a href="#L-82"></a>end <a href="#L-83"></a> <a href="#L-84"></a>------------------------------------------------------------------------------------ <a href="#L-85"></a>-- numKeys <a href="#L-86"></a>-- <a href="#L-87"></a>-- This takes a table and returns an array containing the numbers of any numerical <a href="#L-88"></a>-- keys that have non-nil values, sorted in numerical order. <a href="#L-89"></a>------------------------------------------------------------------------------------ <a href="#L-90"></a>function p.numKeys(t) <a href="#L-91"></a> checkType('numKeys', 1, t, 'table') <a href="#L-92"></a> local isPositiveInteger = p.isPositiveInteger <a href="#L-93"></a> local nums = {} <a href="#L-94"></a> for k in pairs(t) do <a href="#L-95"></a> if isPositiveInteger(k) then <a href="#L-96"></a> nums[#nums + 1] = k <a href="#L-97"></a> end <a href="#L-98"></a> end <a href="#L-99"></a> table.sort(nums) <a href="#L-100"></a> return nums <a href="#L-101"></a>end <a href="#L-102"></a> <a href="#L-103"></a>------------------------------------------------------------------------------------ <a href="#L-104"></a>-- affixNums <a href="#L-105"></a>-- <a href="#L-106"></a>-- This takes a table and returns an array containing the numbers of keys with the <a href="#L-107"></a>-- specified prefix and suffix. For example, for the table <a href="#L-108"></a>-- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", affixNums will return <a href="#L-109"></a>-- {1, 3, 6}. <a href="#L-110"></a>------------------------------------------------------------------------------------ <a href="#L-111"></a>function p.affixNums(t, prefix, suffix) <a href="#L-112"></a> checkType('affixNums', 1, t, 'table') <a href="#L-113"></a> checkType('affixNums', 2, prefix, 'string', true) <a href="#L-114"></a> checkType('affixNums', 3, suffix, 'string', true) <a href="#L-115"></a> <a href="#L-116"></a> local function cleanPattern(s) <a href="#L-117"></a> -- Cleans a pattern so that the magic characters ()%.[]*+-?^$ are interpreted literally. <a href="#L-118"></a> return s:gsub('([%(%)%%%.%[%]%*%+%-%?%^%$])', '%%%1') <a href="#L-119"></a> end <a href="#L-120"></a> <a href="#L-121"></a> prefix = prefix or '' <a href="#L-122"></a> suffix = suffix or '' <a href="#L-123"></a> prefix = cleanPattern(prefix) <a href="#L-124"></a> suffix = cleanPattern(suffix) <a href="#L-125"></a> local pattern = '^' .. prefix .. '([1-9]%d*)' .. suffix .. '$' <a href="#L-126"></a> <a href="#L-127"></a> local nums = {} <a href="#L-128"></a> for k in pairs(t) do <a href="#L-129"></a> if type(k) == 'string' then <a href="#L-130"></a> local num = mw.ustring.match(k, pattern) <a href="#L-131"></a> if num then <a href="#L-132"></a> nums[#nums + 1] = tonumber(num) <a href="#L-133"></a> end <a href="#L-134"></a> end <a href="#L-135"></a> end <a href="#L-136"></a> table.sort(nums) <a href="#L-137"></a> return nums <a href="#L-138"></a>end <a href="#L-139"></a> <a href="#L-140"></a>------------------------------------------------------------------------------------ <a href="#L-141"></a>-- numData <a href="#L-142"></a>-- <a href="#L-143"></a>-- Given a table with keys like {"foo1", "bar1", "foo2", "baz2"}, returns a table <a href="#L-144"></a>-- of subtables in the format <a href="#L-145"></a>-- {[1] = {foo = 'text', bar = 'text'}, [2] = {foo = 'text', baz = 'text'}}. <a href="#L-146"></a>-- Keys that don't end with an integer are stored in a subtable named "other". The <a href="#L-147"></a>-- compress option compresses the table so that it can be iterated over with <a href="#L-148"></a>-- ipairs. <a href="#L-149"></a>------------------------------------------------------------------------------------ <a href="#L-150"></a>function p.numData(t, compress) <a href="#L-151"></a> checkType('numData', 1, t, 'table') <a href="#L-152"></a> checkType('numData', 2, compress, 'boolean', true) <a href="#L-153"></a> local ret = {} <a href="#L-154"></a> for k, v in pairs(t) do <a href="#L-155"></a> local prefix, num = mw.ustring.match(tostring(k), '^([^0-9]*)([1-9][0-9]*)$') <a href="#L-156"></a> if num then <a href="#L-157"></a> num = tonumber(num) <a href="#L-158"></a> local subtable = ret[num] or {} <a href="#L-159"></a> if prefix == '' then <a href="#L-160"></a> -- Positional parameters match the blank string; put them at the start of the subtable instead. <a href="#L-161"></a> prefix = 1 <a href="#L-162"></a> end <a href="#L-163"></a> subtable[prefix] = v <a href="#L-164"></a> ret[num] = subtable <a href="#L-165"></a> else <a href="#L-166"></a> local subtable = ret.other or {} <a href="#L-167"></a> subtable[k] = v <a href="#L-168"></a> ret.other = subtable <a href="#L-169"></a> end <a href="#L-170"></a> end <a href="#L-171"></a> if compress then <a href="#L-172"></a> local other = ret.other <a href="#L-173"></a> ret = p.compressSparseArray(ret) <a href="#L-174"></a> ret.other = other <a href="#L-175"></a> end <a href="#L-176"></a> return ret <a href="#L-177"></a>end <a href="#L-178"></a> <a href="#L-179"></a>------------------------------------------------------------------------------------ <a href="#L-180"></a>-- compressSparseArray <a href="#L-181"></a>-- <a href="#L-182"></a>-- This takes an array with one or more nil values, and removes the nil values <a href="#L-183"></a>-- while preserving the order, so that the array can be safely traversed with <a href="#L-184"></a>-- ipairs. <a href="#L-185"></a>------------------------------------------------------------------------------------ <a href="#L-186"></a>function p.compressSparseArray(t) <a href="#L-187"></a> checkType('compressSparseArray', 1, t, 'table') <a href="#L-188"></a> local ret = {} <a href="#L-189"></a> local nums = p.numKeys(t) <a href="#L-190"></a> for _, num in ipairs(nums) do <a href="#L-191"></a> ret[#ret + 1] = t[num] <a href="#L-192"></a> end <a href="#L-193"></a> return ret <a href="#L-194"></a>end <a href="#L-195"></a> <a href="#L-196"></a>------------------------------------------------------------------------------------ <a href="#L-197"></a>-- sparseIpairs <a href="#L-198"></a>-- <a href="#L-199"></a>-- This is an iterator for sparse arrays. It can be used like ipairs, but can <a href="#L-200"></a>-- handle nil values. <a href="#L-201"></a>------------------------------------------------------------------------------------ <a href="#L-202"></a>function p.sparseIpairs(t) <a href="#L-203"></a> checkType('sparseIpairs', 1, t, 'table') <a href="#L-204"></a> local nums = p.numKeys(t) <a href="#L-205"></a> local i = 0 <a href="#L-206"></a> local lim = #nums <a href="#L-207"></a> return function () <a href="#L-208"></a> i = i + 1 <a href="#L-209"></a> if i <= lim then <a href="#L-210"></a> local key = nums[i] <a href="#L-211"></a> return key, t[key] <a href="#L-212"></a> else <a href="#L-213"></a> return nil, nil <a href="#L-214"></a> end <a href="#L-215"></a> end <a href="#L-216"></a>end <a href="#L-217"></a> <a href="#L-218"></a>------------------------------------------------------------------------------------ <a href="#L-219"></a>-- size <a href="#L-220"></a>-- <a href="#L-221"></a>-- This returns the size of a key/value pair table. It will also work on arrays, <a href="#L-222"></a>-- but for arrays it is more efficient to use the # operator. <a href="#L-223"></a>------------------------------------------------------------------------------------ <a href="#L-224"></a>function p.size(t) <a href="#L-225"></a> checkType('size', 1, t, 'table') <a href="#L-226"></a> local i = 0 <a href="#L-227"></a> for _ in pairs(t) do <a href="#L-228"></a> i = i + 1 <a href="#L-229"></a> end <a href="#L-230"></a> return i <a href="#L-231"></a>end <a href="#L-232"></a> <a href="#L-233"></a>local function defaultKeySort(item1, item2) <a href="#L-234"></a> -- "number" < "string", so numbers will be sorted before strings. <a href="#L-235"></a> local type1, type2 = type(item1), type(item2) <a href="#L-236"></a> if type1 ~= type2 then <a href="#L-237"></a> return type1 < type2 <a href="#L-238"></a> elseif type1 == 'table' or type1 == 'boolean' or type1 == 'function' then <a href="#L-239"></a> return tostring(item1) < tostring(item2) <a href="#L-240"></a> else <a href="#L-241"></a> return item1 < item2 <a href="#L-242"></a> end <a href="#L-243"></a>end <a href="#L-244"></a>------------------------------------------------------------------------------------ <a href="#L-245"></a>-- keysToList <a href="#L-246"></a>-- <a href="#L-247"></a>-- Returns an array of the keys in a table, sorted using either a default <a href="#L-248"></a>-- comparison function or a custom keySort function. <a href="#L-249"></a>------------------------------------------------------------------------------------ <a href="#L-250"></a>function p.keysToList(t, keySort, checked) <a href="#L-251"></a> if not checked then <a href="#L-252"></a> checkType('keysToList', 1, t, 'table') <a href="#L-253"></a> checkTypeMulti('keysToList', 2, keySort, {'function', 'boolean', 'nil'}) <a href="#L-254"></a> end <a href="#L-255"></a> <a href="#L-256"></a> local arr = {} <a href="#L-257"></a> local index = 1 <a href="#L-258"></a> for k in pairs(t) do <a href="#L-259"></a> arr[index] = k <a href="#L-260"></a> index = index + 1 <a href="#L-261"></a> end <a href="#L-262"></a> <a href="#L-263"></a> if keySort ~= false then <a href="#L-264"></a> keySort = type(keySort) == 'function' and keySort or defaultKeySort <a href="#L-265"></a> table.sort(arr, keySort) <a href="#L-266"></a> end <a href="#L-267"></a> <a href="#L-268"></a> return arr <a href="#L-269"></a>end <a href="#L-270"></a> <a href="#L-271"></a>------------------------------------------------------------------------------------ <a href="#L-272"></a>-- sortedPairs <a href="#L-273"></a>-- <a href="#L-274"></a>-- Iterates through a table, with the keys sorted using the keysToList function. <a href="#L-275"></a>-- If there are only numerical keys, sparseIpairs is probably more efficient. <a href="#L-276"></a>------------------------------------------------------------------------------------ <a href="#L-277"></a>function p.sortedPairs(t, keySort) <a href="#L-278"></a> checkType('sortedPairs', 1, t, 'table') <a href="#L-279"></a> checkType('sortedPairs', 2, keySort, 'function', true) <a href="#L-280"></a> <a href="#L-281"></a> local arr = p.keysToList(t, keySort, true) <a href="#L-282"></a> <a href="#L-283"></a> local i = 0 <a href="#L-284"></a> return function () <a href="#L-285"></a> i = i + 1 <a href="#L-286"></a> local key = arr[i] <a href="#L-287"></a> if key ~= nil then <a href="#L-288"></a> return key, t[key] <a href="#L-289"></a> else <a href="#L-290"></a> return nil, nil <a href="#L-291"></a> end <a href="#L-292"></a> end <a href="#L-293"></a>end <a href="#L-294"></a> <a href="#L-295"></a>------------------------------------------------------------------------------------ <a href="#L-296"></a>-- isArray <a href="#L-297"></a>-- <a href="#L-298"></a>-- Returns true if the given value is a table and all keys are consecutive <a href="#L-299"></a>-- integers starting at 1. <a href="#L-300"></a>------------------------------------------------------------------------------------ <a href="#L-301"></a>function p.isArray(v) <a href="#L-302"></a> if type(v) ~= 'table' then <a href="#L-303"></a> return false <a href="#L-304"></a> end <a href="#L-305"></a> local i = 0 <a href="#L-306"></a> for _ in pairs(v) do <a href="#L-307"></a> i = i + 1 <a href="#L-308"></a> if v[i] == nil then <a href="#L-309"></a> return false <a href="#L-310"></a> end <a href="#L-311"></a> end <a href="#L-312"></a> return true <a href="#L-313"></a>end <a href="#L-314"></a> <a href="#L-315"></a>------------------------------------------------------------------------------------ <a href="#L-316"></a>-- isArrayLike <a href="#L-317"></a>-- <a href="#L-318"></a>-- Returns true if the given value is iterable and all keys are consecutive <a href="#L-319"></a>-- integers starting at 1. <a href="#L-320"></a>------------------------------------------------------------------------------------ <a href="#L-321"></a>function p.isArrayLike(v) <a href="#L-322"></a> if not pcall(pairs, v) then <a href="#L-323"></a> return false <a href="#L-324"></a> end <a href="#L-325"></a> local i = 0 <a href="#L-326"></a> for _ in pairs(v) do <a href="#L-327"></a> i = i + 1 <a href="#L-328"></a> if v[i] == nil then <a href="#L-329"></a> return false <a href="#L-330"></a> end <a href="#L-331"></a> end <a href="#L-332"></a> return true <a href="#L-333"></a>end <a href="#L-334"></a> <a href="#L-335"></a>------------------------------------------------------------------------------------ <a href="#L-336"></a>-- invert <a href="#L-337"></a>-- <a href="#L-338"></a>-- Transposes the keys and values in an array. For example, {"a", "b", "c"} -> <a href="#L-339"></a>-- {a = 1, b = 2, c = 3}. Duplicates are not supported (result values refer to <a href="#L-340"></a>-- the index of the last duplicate) and NaN values are ignored. <a href="#L-341"></a>------------------------------------------------------------------------------------ <a href="#L-342"></a>function p.invert(arr) <a href="#L-343"></a> checkType("invert", 1, arr, "table") <a href="#L-344"></a> local isNan = p.isNan <a href="#L-345"></a> local map = {} <a href="#L-346"></a> for i, v in ipairs(arr) do <a href="#L-347"></a> if not isNan(v) then <a href="#L-348"></a> map[v] = i <a href="#L-349"></a> end <a href="#L-350"></a> end <a href="#L-351"></a> <a href="#L-352"></a> return map <a href="#L-353"></a>end <a href="#L-354"></a> <a href="#L-355"></a>------------------------------------------------------------------------------------ <a href="#L-356"></a>-- listToSet <a href="#L-357"></a>-- <a href="#L-358"></a>-- Creates a set from the array part of the table. Indexing the set by any of the <a href="#L-359"></a>-- values of the array returns true. For example, {"a", "b", "c"} -> <a href="#L-360"></a>-- {a = true, b = true, c = true}. NaN values are ignored as Lua considers them <a href="#L-361"></a>-- never equal to any value (including other NaNs or even themselves). <a href="#L-362"></a>------------------------------------------------------------------------------------ <a href="#L-363"></a>function p.listToSet(arr) <a href="#L-364"></a> checkType("listToSet", 1, arr, "table") <a href="#L-365"></a> local isNan = p.isNan <a href="#L-366"></a> local set = {} <a href="#L-367"></a> for _, v in ipairs(arr) do <a href="#L-368"></a> if not isNan(v) then <a href="#L-369"></a> set[v] = true <a href="#L-370"></a> end <a href="#L-371"></a> end <a href="#L-372"></a> <a href="#L-373"></a> return set <a href="#L-374"></a>end <a href="#L-375"></a> <a href="#L-376"></a>------------------------------------------------------------------------------------ <a href="#L-377"></a>-- deepCopy <a href="#L-378"></a>-- <a href="#L-379"></a>-- Recursive deep copy function. Preserves identities of subtables. <a href="#L-380"></a>------------------------------------------------------------------------------------ <a href="#L-381"></a>local function _deepCopy(orig, includeMetatable, already_seen) <a href="#L-382"></a> -- Stores copies of tables indexed by the original table. <a href="#L-383"></a> already_seen = already_seen or {} <a href="#L-384"></a> <a href="#L-385"></a> local copy = already_seen[orig] <a href="#L-386"></a> if copy ~= nil then <a href="#L-387"></a> return copy <a href="#L-388"></a> end <a href="#L-389"></a> <a href="#L-390"></a> if type(orig) == 'table' then <a href="#L-391"></a> copy = {} <a href="#L-392"></a> for orig_key, orig_value in pairs(orig) do <a href="#L-393"></a> copy[_deepCopy(orig_key, includeMetatable, already_seen)] = _deepCopy(orig_value, includeMetatable, already_seen) <a href="#L-394"></a> end <a href="#L-395"></a> already_seen[orig] = copy <a href="#L-396"></a> <a href="#L-397"></a> if includeMetatable then <a href="#L-398"></a> local mt = getmetatable(orig) <a href="#L-399"></a> if mt ~= nil then <a href="#L-400"></a> local mt_copy = _deepCopy(mt, includeMetatable, already_seen) <a href="#L-401"></a> setmetatable(copy, mt_copy) <a href="#L-402"></a> already_seen[mt] = mt_copy <a href="#L-403"></a> end <a href="#L-404"></a> end <a href="#L-405"></a> else -- number, string, boolean, etc <a href="#L-406"></a> copy = orig <a href="#L-407"></a> end <a href="#L-408"></a> return copy <a href="#L-409"></a>end <a href="#L-410"></a> <a href="#L-411"></a>function p.deepCopy(orig, noMetatable, already_seen) <a href="#L-412"></a> checkType("deepCopy", 3, already_seen, "table", true) <a href="#L-413"></a> return _deepCopy(orig, not noMetatable, already_seen) <a href="#L-414"></a>end <a href="#L-415"></a> <a href="#L-416"></a>------------------------------------------------------------------------------------ <a href="#L-417"></a>-- sparseConcat <a href="#L-418"></a>-- <a href="#L-419"></a>-- Concatenates all values in the table that are indexed by a number, in order. <a href="#L-420"></a>-- sparseConcat{a, nil, c, d} => "acd" <a href="#L-421"></a>-- sparseConcat{nil, b, c, d} => "bcd" <a href="#L-422"></a>------------------------------------------------------------------------------------ <a href="#L-423"></a>function p.sparseConcat(t, sep, i, j) <a href="#L-424"></a> local arr = {} <a href="#L-425"></a> <a href="#L-426"></a> local arr_i = 0 <a href="#L-427"></a> for _, v in p.sparseIpairs(t) do <a href="#L-428"></a> arr_i = arr_i + 1 <a href="#L-429"></a> arr[arr_i] = v <a href="#L-430"></a> end <a href="#L-431"></a> <a href="#L-432"></a> return table.concat(arr, sep, i, j) <a href="#L-433"></a>end <a href="#L-434"></a> <a href="#L-435"></a>------------------------------------------------------------------------------------ <a href="#L-436"></a>-- length <a href="#L-437"></a>-- <a href="#L-438"></a>-- Finds the length of an array, or of a quasi-array with keys such as "data1", <a href="#L-439"></a>-- "data2", etc., using an exponential search algorithm. It is similar to the <a href="#L-440"></a>-- operator #, but may return a different value when there are gaps in the array <a href="#L-441"></a>-- portion of the table. Intended to be used on data loaded with mw.loadData. For <a href="#L-442"></a>-- other tables, use #. <a href="#L-443"></a>-- Note: #frame.args in frame object always be set to 0, regardless of the number <a href="#L-444"></a>-- of unnamed template parameters, so use this function for frame.args. <a href="#L-445"></a>------------------------------------------------------------------------------------ <a href="#L-446"></a>function p.length(t, prefix) <a href="#L-447"></a> -- requiring module inline so that [[Module:Exponential search]] which is <a href="#L-448"></a> -- only needed by this one function doesn't get millions of transclusions <a href="#L-449"></a> local expSearch = require("Module:Exponential search") <a href="#L-450"></a> checkType('length', 1, t, 'table') <a href="#L-451"></a> checkType('length', 2, prefix, 'string', true) <a href="#L-452"></a> return expSearch(function (i) <a href="#L-453"></a> local key <a href="#L-454"></a> if prefix then <a href="#L-455"></a> key = prefix .. tostring(i) <a href="#L-456"></a> else <a href="#L-457"></a> key = i <a href="#L-458"></a> end <a href="#L-459"></a> return t[key] ~= nil <a href="#L-460"></a> end) or 0 <a href="#L-461"></a>end <a href="#L-462"></a> <a href="#L-463"></a>------------------------------------------------------------------------------------ <a href="#L-464"></a>-- inArray <a href="#L-465"></a>-- <a href="#L-466"></a>-- Returns true if valueToFind is a member of the array, and false otherwise. <a href="#L-467"></a>------------------------------------------------------------------------------------ <a href="#L-468"></a>function p.inArray(arr, valueToFind) <a href="#L-469"></a> checkType("inArray", 1, arr, "table") <a href="#L-470"></a> -- if valueToFind is nil, error? <a href="#L-471"></a> <a href="#L-472"></a> for _, v in ipairs(arr) do <a href="#L-473"></a> if v == valueToFind then <a href="#L-474"></a> return true <a href="#L-475"></a> end <a href="#L-476"></a> end <a href="#L-477"></a> return false <a href="#L-478"></a>end <a href="#L-479"></a> <a href="#L-480"></a>return p </pre></div></div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikibooks.org/w/index.php?title=Module:TableTools&oldid=4248012">https://en.wikibooks.org/w/index.php?title=Module:TableTools&oldid=4248012</a>"</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 1 April 2023, at 17:58.</li> <li id="footer-info-copyright">Text is available under the <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike License</a>; additional terms may apply. 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