Open main menu
Home
Random
Donate
Recent changes
Special pages
Community portal
Preferences
About Stockhub
Disclaimers
Search
User menu
Talk
Contributions
Create account
Log in
Editing
Module:Roman
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
-- This module implements {{Roman}}. local p = {} -- This function implements the {{overline}} template. local function overline(s) return mw.ustring.format( '<span style="text-decoration:overline;">%s</span>', s ) end -- Gets the Roman numerals for a given numeral table. Returns both the string of -- numerals and the value of the number after it is finished being processed. local function getLetters(num, t) local ret = {} for _, v in ipairs(t) do local val, letter = unpack(v) while num >= val do num = num - val table.insert(ret, letter) end end return table.concat(ret), num end -- The main control flow of the module. local function _main(args) -- Get input and exit displaying nothing if the input is empty. if args[1] == nil then return end local num = tonumber(args[1]) if not num or num < 0 or num == math.huge then error('Invalid number ' .. args[1], 2) elseif num == 0 then return 'N' end -- Return a message for numbers too big to be expressed in Roman numerals. if num >= 5000000 then return args[2] or 'N/A' end local ret = '' -- Find the Roman numerals for the large part of numbers. -- 23 April 2016 - tweaked to >= 4000 to accept big Roman 'IV' -- The if statement is not strictly necessary, but makes the algorithm -- more efficient for smaller numbers. if num >= 4000 then local bigRomans = { { 1000000, 'M' }, { 900000, 'CM' }, { 500000, 'D' }, { 400000, 'CD' }, { 100000, 'C' }, { 90000, 'XC' }, { 50000, 'L' }, { 40000, 'XL' }, { 10000, 'X' }, { 9000, 'IX' }, { 5000, 'V' }, { 4000, 'IV' }, } local bigLetters bigLetters, num = getLetters(num, bigRomans) ret = overline(bigLetters) end -- Find the Roman numerals for numbers less than the big Roman threshold. local smallRomans = { { 1000, 'M' }, { 900, 'CM' }, { 500, 'D' }, { 400, 'CD' }, { 100, 'C' }, { 90, 'XC' }, { 50, 'L' }, { 40, 'XL' }, { 10, 'X' }, { 9, 'IX' }, { 5, 'V' }, { 4, 'IV' }, { 1, 'I' } } local smallLetters = getLetters( num, smallRomans ) ret = ret .. smallLetters if args.fraction == 'yes' then -- Find the Roman numerals for the fractional parts of numbers. -- If num is not a whole number, add half of 1/1728 (the smallest unit) to equate to rounding. -- Ensure we're not less than the smallest unit or larger than 1 - smallest unit -- to avoid getting two "half" symbols or no symbols at all num = num - math.floor(num) if num ~= 0 then num = math.max(1.1/1728, math.min(1727.1/1728, num + 1/3456)) end local fractionalRomans = { { 1/2, 'S' }, { 5/12, "''':'''β’''':'''" }, { 1/3, "'''::'''" }, { 1/4, "''':'''β’" }, { 1/6, "''':'''" }, { 1/12, 'β’' }, { 1/24, 'Π' }, { 1/36, 'Ζ§Ζ§' }, { 1/48, 'Ζ' }, { 1/72, 'Ζ§' }, { 1/144, '<s>Ζ§</s>' }, { 1/288, 'β' }, { 1/1728, 'Β»' }, } local fractionalLetters = getLetters(num, fractionalRomans) ret = ret .. fractionalLetters end return ret end function p.main(frame) -- If called via #invoke, use the args passed into the invoking -- template, or the args passed to #invoke if any exist. Otherwise -- assume args are being passed directly in from the debug console -- or from another Lua module. local origArgs if frame == mw.getCurrentFrame() then origArgs = frame:getParent().args for k, v in pairs(frame.args) do origArgs = frame.args break end else origArgs = frame end -- Trim whitespace and remove blank arguments. local args = {} for k, v in pairs(origArgs) do if type( v ) == 'string' then v = mw.text.trim(v) end if v ~= '' then args[k] = v end end -- exit if not given anything if args == nil or args == {} then return end -- Given mathematical expression, simplify to a number if type(args[1]) == 'string' then args[1] = mw.ext.ParserFunctions.expr(args[1]) end return _main(args) end return p
Summary:
Please note that all contributions to Stockhub may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Stockhub:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)
Templates used on this page:
Template:Green
(
edit
)
Template:High-use
(
edit
)
Template:Lua sidebar
(
edit
)
Template:Module other
(
edit
)
Template:Module rating
(
edit
)
Template:Ombox
(
edit
)
Template:Tl
(
edit
)
Module:Arguments
(
edit
)
Module:Effective protection level
(
edit
)
Module:Message box
(
edit
)
Module:Message box/configuration
(
edit
)
Module:Message box/ombox.css
(
edit
)
Module:Roman/doc
(
edit
)
Module:Yesno
(
edit
)