Module:Date

-- This module is intended for processing of date strings local date = {}

--[[ ISOyear This function returns year part of date string. Usage:

Parameters s: The date string If invoked using named parameters, Mediawiki will automatically remove any leading or trailing whitespace from the target string. ]] function date.ISOyear( frame ) local s = frame.args.s   -- if empty string then return it    if mw.ustring.len(s) == 0 then return s   end -- if number then return it   if tonumber( s ) then return mw.ustring.format('%04i', s)   end -- otherwise use regular expression match s = mw.ustring.match( s, '(-?%d%d?%d?%d?)-' ) if s then return mw.ustring.format('%04i', s)   else return '' end end

return date