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local p = {}  p.trim = function(frame) return mw.text.trim(frame.args[1] or "") end  p.sentence = function (frame) -- {{lc:}} is strip-marker safe, string.lower is not. frame.args[1] = frame:callParserFunction('lc', frame.args[1]) return p.ucfirst(frame) end  p.ucfirst = function (frame ) local s = mw.text.trim( frame.args[1] or "" ) local s1 = "" -- if it's a list chop off and (store as s1) everything up to the first <li> local lipos = mw.ustring.find(s, "<li>" ) if lipos then s1 = mw.ustring.sub(s, 1, lipos + 3) s = mw.ustring.sub(s, lipos + 4) end -- s1 is either "" or the first part of the list markup, so we can continue -- and prepend s1 to the returned string local letterpos if mw.ustring.find(s, "^%[%[[^|]+|[^%]]+%]%]") then -- this is a piped wikilink, so we capitalise the text, not the pipe local _ _, letterpos = mw.ustring.find(s, "|%W*%w") -- find the first letter after the pipe else letterpos = mw.ustring.find(s, '%w') end if letterpos then local first = mw.ustring.sub(s, 1, letterpos - 1) local letter = mw.ustring.sub(s, letterpos, letterpos) local rest = mw.ustring.sub(s, letterpos + 1) return s1 .. first .. mw.ustring.upper(letter) .. rest else return s1 .. s end end  p.title = function (frame ) -- http://grammar.yourdictionary.com/capitalization/rules-for-capitalization-in-titles.html -- recommended by The U.S. Government Printing Office Style Manual: -- "Capitalize all words in titles of publications and documents, -- except a, an, the, at, by, for, in, of, on, to, up, and, as, but, or, and nor." local alwayslower = {['a'] = 1, ['an'] = 1, ['the'] = 1, ['and'] = 1, ['but'] = 1, ['or'] = 1, ['for'] = 1, ['nor'] = 1, ['on'] = 1, ['in'] = 1, ['at'] = 1, ['to'] = 1, ['from'] = 1, ['by'] = 1, ['of'] = 1, ['up'] = 1 } local res = '' local s = mw.text.trim( frame.args[1] or "" ) local words = mw.text.split( s, " ") for i, s in ipairs(words) do -- {{lc:}} is strip-marker safe, string.lower is not. s = frame:callParserFunction('lc', s) if i == 1 or alwayslower[s] ~= 1 then s = mw.getContentLanguage():ucfirst(s) end words[i] = s end return table.concat(words, " ") end  -- findlast finds the last item in a list -- the first unnamed parameter is the list -- the second, optional unnamed parameter is the list separator (default = comma space) -- returns the whole list if separator not found p.findlast = function(frame) local s = mw.text.trim( frame.args[1] or "" ) local sep = frame.args[2] or "" if sep == "" then sep = ", " end local pattern = ".*" .. sep .. "(.*)" local a, b, last = s:find(pattern) if a then return last else return s end end  -- stripZeros finds the first number and strips leading zeros (apart from units) -- e.g "0940" -> "940"; "Year: 0023" -> "Year: 23"; "00.12" -> "0.12" p.stripZeros = function(frame) local s = mw.text.trim(frame.args[1] or "") local n = tonumber( string.match( s, "%d+" ) ) or "" s = string.gsub( s, "%d+", n, 1 ) return s end  -- nowiki ensures that a string of text is treated by the MediaWiki software as just a string -- it takes an unnamed parameter and trims whitespace, then removes any wikicode p.nowiki = function(frame) local str = mw.text.trim(frame.args[1] or "") return mw.text.nowiki(str) end  -- split splits text at boundaries specified by separator -- and returns the chunk for the index idx (starting at 1) -- #invoke:String2 |split |text |separator |index |true/false -- #invoke:String2 |split |txt=text |sep=separator |idx=index |plain=true/false -- if plain is false/no/0 then separator is treated as a Lua pattern - defaults to plain=true p.split = function(frame) local args = frame.args if not(args[1] or args.txt) then args = frame:getParent().args end local txt = args[1] or args.txt or "" if txt == "" then return nil end local sep = (args[2] or args.sep or ""):gsub('"', '') local idx = tonumber(args[3] or args.idx) or 1 local plain = (args[4] or args.plain or "true"):sub(1,1) plain = (plain ~= "f" and plain ~= "n" and plain ~= "0") local splittbl = mw.text.split( txt, sep, plain ) if idx < 0 then idx = #splittbl + idx + 1 end return splittbl[idx] end  -- val2percent scans through a string, passed as either the first unnamed parameter or |txt= -- it converts each number it finds into a percentage and returns the resultant string. p.val2percent = function(frame) local args = frame.args if not(args[1] or args.txt) then args = frame:getParent().args end local txt = mw.text.trim(args[1] or args.txt or "") if txt == "" then return nil end local function v2p (x) x = (tonumber(x) or 0) * 100 if x == math.floor(x) then x = math.floor(x) end return x .. "%" end txt = txt:gsub("%d[%d%.]*", v2p) -- store just the string return txt end  -- one2a scans through a string, passed as either the first unnamed parameter or |txt= -- it converts each occurrence of 'one ' into either 'a ' or 'an ' and returns the resultant string. p.one2a = function(frame) local args = frame.args if not(args[1] or args.txt) then args = frame:getParent().args end local txt = mw.text.trim(args[1] or args.txt or "") if txt == "" then return nil end txt = txt:gsub(" one ", " a "):gsub("^one", "a"):gsub("One ", "A "):gsub("a ([aeiou])", "an %1"):gsub("A ([aeiou])", "An %1") return txt end  -- findpagetext returns the position of a piece of text in a page -- First positional parameter or |text is the search text -- Optional parameter |title is the page title, defaults to current page -- Optional parameter |plain is either true for plain search (default) or false for Lua pattern search -- Optional parameter |nomatch is the return value when no match is found; default is nil p._findpagetext = function(args) -- process parameters local nomatch = args.nomatch or "" if nomatch == "" then nomatch = nil end -- local text = mw.text.trim(args[1] or args.text or "") if text == "" then return nil end -- local title = args.title or "" local titleobj if title == "" then titleobj = mw.title.getCurrentTitle() else titleobj = mw.title.new(title) end -- local plain = args.plain or "" if plain:sub(1, 1) == "f" then plain = false else plain = true end -- get the page content and look for 'text' - return position or nomatch local content = titleobj and titleobj:getContent() return content and mw.ustring.find(content, text, 1, plain) or nomatch end p.findpagetext = function(frame) local args = frame.args local pargs = frame:getParent().args for k, v in pairs(pargs) do args[k] = v end if not (args[1] or args.text) then return nil end -- just the first value return (p._findpagetext(args)) end  -- returns the decoded url. Inverse of parser function {{urlencode:val|TYPE}} -- Type is: -- QUERY decodes + to space (default) -- PATH does no extra decoding -- WIKI decodes _ to space p._urldecode = function(url, type) url = url or "" type = (type == "PATH" or type == "WIKI") and type return mw.uri.decode( url, type ) end -- {{#invoke:String2|urldecode|url=url|type=type}} p.urldecode = function(frame) return mw.uri.decode( frame.args.url, frame.args.type ) end  -- what follows was merged from Module:StringFunc  -- helper functions p._GetParameters = require('Module:GetParameters')  -- Argument list helper function, as per Module:String p._getParameters = p._GetParameters.getParameters  -- Escape Pattern helper function so that all characters are treated as plain text, as per Module:String function p._escapePattern( pattern_str) return mw.ustring.gsub( pattern_str, "([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" ) end  -- Helper Function to interpret boolean strings, as per Module:String p._getBoolean = p._GetParameters.getBoolean  --[[ Strip  This function Strips characters from string  Usage: {{#invoke:String2|strip|source_string|characters_to_strip|plain_flag}}  Parameters source: The string to strip chars: The pattern or list of characters to strip from string, replaced with '' plain: A flag indicating that the chars should be understood as plain text. defaults to true.  Leading and trailing whitespace is also automatically stripped from the string. ]] function p.strip( frame ) local new_args = p._getParameters( frame.args, {'source', 'chars', 'plain'} ) local source_str = new_args['source'] or '' local chars = new_args['chars'] or '' or 'characters' source_str = mw.text.trim(source_str) if source_str == '' or chars == '' then return source_str end local l_plain = p._getBoolean( new_args['plain'] or true ) if l_plain then chars = p._escapePattern( chars ) end local result result = mw.ustring.gsub(source_str, "["..chars.."]", '') return result end  --[[ Match any Returns the index of the first given pattern to match the input. Patterns must be consecutively numbered. Returns the empty string if nothing matches for use in {{#if:}}  Usage: {{#invoke:String2|matchAll|source=123 abc|456|abc}} returns '2'.  Parameters: source: the string to search plain: A flag indicating that the patterns should be understood as plain text. defaults to true. 1, 2, 3, ...: the patterns to search for ]] function p.matchAny(frame) local source_str = frame.args['source'] or error('The source parameter is mandatory.') local l_plain = p._getBoolean( frame.args['plain'] or true ) for i = 1, math.huge do local pattern = frame.args[i] if not pattern then return '' end if mw.ustring.find(source_str, pattern, 1, l_plain) then return tostring(i) end end end  --[[--------------------------< H Y P H E N _ T O _ D A S H >--------------------------------------------------  Converts a hyphen to a dash under certain conditions. The hyphen must separate like items; unlike items are returned unmodified. These forms are modified: letter - letter (A - B) digit - digit (4-5) digit separator digit - digit separator digit (4.1-4.5 or 4-1-4-5) letterdigit - letterdigit (A1-A5) (an optional separator between letter and digit is supported – a.1-a.5 or a-1-a-5) digitletter - digitletter (5a - 5d) (an optional separator between letter and digit is supported – 5.a-5.d or 5-a-5-d)  any other forms are returned unmodified.  str may be a comma- or semicolon-separated list  ]] function p.hyphen_to_dash( str, spacing ) if (str == nil or str == '') then return str end  local accept  str = mw.text.decode(str, true )-- replace html entities with their characters; semicolon mucks up the text.split  local out = {} local list = mw.text.split (str, '%s*[,;]%s*')-- split str at comma or semicolon separators if there are any  for _, item in ipairs (list) do-- for each item in the list item = mw.text.trim(item)-- trim whitespace item, accept = item:gsub ('^%(%((.+)%)%)$', '%1') if accept == 0 and mw.ustring.match (item, '^%w*[%.%-]?%w+%s*[%-–—]%s*%w*[%.%-]?%w+$') then-- if a hyphenated range or has endash or emdash separators if item:match ('^%a+[%.%-]?%d+%s*%-%s*%a+[%.%-]?%d+$') or-- letterdigit hyphen letterdigit (optional separator between letter and digit) item:match ('^%d+[%.%-]?%a+%s*%-%s*%d+[%.%-]?%a+$') or-- digitletter hyphen digitletter (optional separator between digit and letter) item:match ('^%d+[%.%-]%d+%s*%-%s*%d+[%.%-]%d+$') or-- digit separator digit hyphen digit separator digit item:match ('^%d+%s*%-%s*%d+$') or-- digit hyphen digit item:match ('^%a+%s*%-%s*%a+$') then-- letter hyphen letter item = item:gsub ('(%w*[%.%-]?%w+)%s*%-%s*(%w*[%.%-]?%w+)', '%1–%2')-- replace hyphen, remove extraneous space characters else item = mw.ustring.gsub (item, '%s*[–—]%s*', '–')-- for endash or emdash separated ranges, replace em with en, remove extraneous whitespace end end table.insert (out, item)-- add the (possibly modified) item to the output table end  local temp_str = table.concat (out, ',' .. spacing)-- concatenate the output table into a comma separated string temp_str, accept = temp_str:gsub ('^%(%((.+)%)%)$', '%1')-- remove accept-this-as-written markup when it wraps all of concatenated out if accept ~= 0 then temp_str = str:gsub ('^%(%((.+)%)%)$', '%1')-- when global markup removed, return original str; do it this way to suppress boolean second return value end return temp_str end  function p.hyphen2dash( frame ) local str = frame.args[1] or '' local spacing = frame.args[2] or ' ' -- space is part of the standard separator for normal spacing (but in conjunction with templates r/rp/ran we may need a narrower spacing  return p.hyphen_to_dash(str, spacing) end  -- Similar to [[Module:String#endswith]] function p.startswith(frame) return (frame.args[1]:sub(1, frame.args[2]:len()) == frame.args[2]) and 'yes' or '' end  return p