68.197.20.147 at 12:49, 12 August 2020

2020-08-12T12:49:07Z

New page

--This Module is for Lua experimentation. No other pages refer to it.

local p = {}

function p.siteinfo(frame)
return mw.site.siteName .. '--' .. '(' .. mw.site.server .. ')'
end

function p.getEntity(frame)
local v = mw.wikibase.getEntity();
if v == nil then
return 'nil'
else
return v.id
end
end

--[[
Test with:
* Debug console
** Code:
:: =p.ustring_find({args={[1]='abab', [2]='b', [3]=3, [4]='true'}})
** Returns -> 4 (2nd b, not 1st b)
* https://en.wikipedia.org/wiki/Project:Sandbox
** Code:
:: {{#invoke:Sandbox/Gnosygnu|ustring_find|abab|b|3|true}}
** Returns -> 4 (2nd b, not 1st b)
--]]
function p.ustring_find(frame)
local args = frame.args;
local rslt = {mw.ustring.find(args[1], args[2], tonumber(args[3]), args[4] == 'true')};

local rv = '';
local rslt_len = #rslt;
for i=1,rslt_len do
if i ~= 1 then
rv = rv .. ';'
end
rv = rv .. rslt[i]
end
return rv;
end

function p.ustring_gsub(frame)
local args = frame.args;
local rslt = {mw.ustring.gsub(args[1], args[2], args[3])};

local rv = '';
local rslt_len = #rslt;
for i=1,rslt_len do
if i ~= 1 then
rv = rv .. ';'
end
rv = rv .. rslt[i]
end
return rv;
end

function p.test18(frame)
return mw.language.fetchLanguageName(frame.args[1], 'en');
-- return mw.language.fetchLanguageName(frame.args[1]);
end

--=p.resolvePropertyId({args={[1]='P123'}})
function p.resolvePropertyId(frame)
return mw.wikibase.resolvePropertyId(frame.args[1]);
end

function p.getParentTitle(frame)
return frame:getParent():getTitle()
end
function p.getCurrentTitle(frame)
return frame:getTitle()
end

function p.wikiencode( s )
local ret = string.gsub( s, '([^a-zA-Z0-9!$()*,./:;@~_-])', function ( c )
if c == ' ' then
return '_'
else
return string.len(c) .. ":" .. string.byte( c, 1, 1 ) .. ";"
-- return string.format( '%%%02X', string.byte( c, 1, 1 ) )
end
end );
return ret
end

function p.test19()
return string.gsub("aæb", '([^a-zA-Z0-9!$()*,./:;@~_-])', "x")
end

function p.test_726()
-- mw.ustring.gsub("仰", "()[仰]+()", function(pos1, pos2)
mw.ustring.gsub("a", "()a()", function(pos1, pos2)
mw.log(pos1);
mw.log(pos2);
end)
end

function p.formatNum()
local lang = mw.getContentLanguage();
local formatted_num = lang:formatNum(7.68e-000005);
return formatted_num;
end
function p.test_732()
mw.log('should not print mw.log');
mw.ustring.gsub("a", "(a)(%f[%s])", function(pos1, pos2)
mw.log('match', "`" .. pos1 .. "`", "`" .. pos2 .. "`");
end)
end

function p.test_732_frontier()
return mw.ustring.gsub("a b c", "%f[%W]", "()")
end

function p.test_726_anypos()
mw.ustring.gsub("abcd", "a(bc)d", function(arg1)
mw.log('basic', arg1, arg2);
end)

mw.ustring.gsub("abcd", "a()bcd", function(arg1)
mw.log('empty', arg1, arg2);
end)
end

function p.test_727(id2)
-- local id2 = frame.args[1];
--P1362's format regex: \p{Lu}[\p{L}\d_',\.\-\*/–]{3,59} (e.g. Abcd)
-- local class = "[%a%d_',%.%-%(%)%*/–]"
local class = "[%a]"
-- local regex = "^%u"..string.rep(class, 3)..string.rep(class.."?", 56).."$"
local regex = "^%u"..string.rep(class, 3)..string.rep(class.."?", 56).."$"
-- dbg(id2);
-- dbg(regex)
if not mw.ustring.match( id2, regex ) then
return "match:n"
end
return 'match:y'
end

function p.test_775(s)
return tonumber(s)
end

--
-- This module implements [[Template:Percentage]]
--

local math_module = require( "Module:Math" )
local precision = math_module._precision
local sortkey = require( "Module:Sortkey" )

local function rnd(num, digits)
-- This function implements {{rnd}}
mw.log('a11', num, digits);
local x = p._precision_format(tostring(num), digits)
mw.log('a12', x);
return x;
end

local function oom(num)
-- This function implements {{order of magnitude}}
return math_module._order(tostring(num))
end

function _nonscinote(num)
-- This function undoes scientific notation
mw.log(num);
if mw.ustring.match(num or '', '^%s*(%d)%.(%d+)<span[^<>]*>×10([%-−]*)(%d)%s*$') then
local a,b,c,d = mw.ustring.match(num or '', '^%s*(%d)%.(%d+)<span[^<>]*>×10([%-−]*)(%d)%s*$')
mw.log('x', a, b, c, d);
d = tonumber(d) or 1
if c ~= '' then
return '0.' .. mw.ustring.rep('0', d - 1) .. a .. b
else
return a .. mw.ustring.sub(b .. mw.ustring.rep('0', d ), 1, d)
end
end
return num
end

local function fmtout(num,snote)
if snote then
return _nonscinote(num)
else
return num
end
end

function p._percentage(n1, n2, prec, suffix, pad, sigfig, sn)
local pct = 100*n1/n2
skey = ''

-- prec = math.floor(prec)

if sigfig ~= '' then
if pct ~= 0 then
mw.log('a1', rnd(pct, tonumber(sigfig) - oom(pct) - 1));
mw.log('b1', fmtout(rnd(pct, tonumber(sigfig) - oom(pct) - 1), sn));
return skey .. fmtout(rnd(pct, tonumber(sigfig) - oom(pct) - 1), sn) .. suffix
else
mw.log('b');
return skey .. fmtout(rnd(pct, tonumber(sigfig) - 3), sn) .. suffix
end
end
if pad ~= '' then
mw.log('c');
return skey .. fmtout(rnd(pct, prec), sn) .. suffix
end

prec = (prec < 0) and 0 or prec
if pct ~= 0 then
pct = ((pct < 0) and -1 or 1)*math.floor(math.abs(pct * 10^prec) + 0.5) / 10^prec
end

mw.log('d');
return skey .. fmtout(pct, sn) .. suffix
end

local yesno, getArgs -- lazily initialized
local wrap = {} -- Holds wrapper functions that process arguments from #invoke. These act as intemediary between functions meant for #invoke and functions meant for Lua.

--[[
Helper functions used to avoid redundant code.
]]

local function err(msg)
-- Generates wikitext error messages.
return mw.ustring.format('Formatting error: %s', msg)
end

local function unpackNumberArgs(args)
-- Returns an unpacked list of arguments specified with numerical keys.
local ret = {}
for k, v in pairs(args) do
if type(k) == 'number' then
table.insert(ret, v)
end
end
return unpack(ret)
end

local function makeArgArray(...)
-- Makes an array of arguments from a list of arguments that might include nils.
local args = {...} -- Table of arguments. It might contain nils or non-number values, so we can't use ipairs.
local nums = {} -- Stores the numbers of valid numerical arguments.
local ret = {}
for k, v in pairs(args) do
v = p._cleanNumber(v)
if v then
nums[#nums + 1] = k
args[k] = v
end
end
table.sort(nums)
for i, num in ipairs(nums) do
ret[#ret + 1] = args[num]
end
return ret
end

local function fold(func, ...)
-- Use a function on all supplied arguments, and return the result. The function must accept two numbers as parameters,
-- and must return a number as an output. This number is then supplied as input to the next function call.
local vals = makeArgArray(...)
local count = #vals -- The number of valid arguments
if count == 0 then return
-- Exit if we have no valid args, otherwise removing the first arg would cause an error.
nil, 0
end
local ret = table.remove(vals, 1)
for _, val in ipairs(vals) do
ret = func(ret, val)
end
return ret, count
end

--[[
Fold arguments by selectively choosing values (func should return when to choose the current "dominant" value).
]]
local function binary_fold(func, ...)
local value = fold((function(a, b) if func(a, b) then return a else return b end end), ...)
return value
end

--[[
random

Generate a random number

Usage:
{{#invoke: Math | random }}
{{#invoke: Math | random | maximum value }}
{{#invoke: Math | random | minimum value | maximum value }}
]]

function wrap.random(args)
local first = p._cleanNumber(args[1])
local second = p._cleanNumber(args[2])
return p._random(first, second)
end

function p._random(first, second)
math.randomseed(mw.site.stats.edits + mw.site.stats.pages + os.time() + math.floor(os.clock() * 1000000000))
-- math.random will throw an error if given an explicit nil parameter, so we need to use if statements to check the params.
if first and second then
if first <= second then -- math.random doesn't allow the first number to be greater than the second.
return math.random(first, second)
end
elseif first then
return math.random(first)
else
return math.random()
end
end

--[[
order

Determine order of magnitude of a number

Usage:
{{#invoke: Math | order | value }}
]]

function wrap.order(args)
local input_string = (args[1] or args.x or '0');
local input_number = p._cleanNumber(input_string);
if input_number == nil then
return err('order of magnitude input appears non-numeric')
else
return p._order(input_number)
end
end

function p._order(x)
if x == 0 then return 0 end
return math.floor(math.log10(math.abs(x)))
end

--[[
precision

Detemines the precision of a number using the string representation

Usage:
{{ #invoke: Math | precision | value }}
]]

function wrap.precision(args)
local input_string = (args[1] or args.x or '0');
local trap_fraction = args.check_fraction;
local input_number;

if not yesno then
yesno = require('Module:Yesno')
end
if yesno(trap_fraction, true) then -- Returns true for all input except nil, false, "no", "n", "0" and a few others. See [[Module:Yesno]].
local pos = string.find(input_string, '/', 1, true);
if pos ~= nil then
if string.find(input_string, '/', pos + 1, true) == nil then
local denominator = string.sub(input_string, pos+1, -1);
local denom_value = tonumber(denominator);
if denom_value ~= nil then
return math.log10(denom_value);
end
end
end
end

input_number, input_string = p._cleanNumber(input_string);
if input_string == nil then
return err('precision input appears non-numeric')
else
return p._precision(input_string)
end
end

function p._precision(x)
if type(x) == 'number' then
x = tostring(x)
end
x = string.upper(x)

local decimal = x:find('%.')
local exponent_pos = x:find('E')
local result = 0;

if exponent_pos ~= nil then
local exponent = string.sub(x, exponent_pos + 1)
x = string.sub(x, 1, exponent_pos - 1)
result = result - tonumber(exponent)
end

if decimal ~= nil then
result = result + string.len(x) - decimal
return result
end

local pos = string.len(x);
while x:byte(pos) == string.byte('0') do
pos = pos - 1
result = result - 1
if pos <= 0 then
return 0
end
end

return result
end

--[[
max

Finds the maximum argument

Usage:
{{#invoke:Math| max | value1 | value2 | ... }}

Note, any values that do not evaluate to numbers are ignored.
]]

function wrap.max(args)
return p._max(unpackNumberArgs(args))
end

function p._max(...)
local max_value = binary_fold((function(a, b) return a > b end), ...)
if max_value then
return max_value
end
end

--[[
median

Find the median of set of numbers

Usage:
{{#invoke:Math | median | number1 | number2 | ...}}
OR
{{#invoke:Math | median }}
]]

function wrap.median(args)
return p._median(unpackNumberArgs(args))
end

function p._median(...)
local vals = makeArgArray(...)
local count = #vals
table.sort(vals)

if count == 0 then
return 0
end

if p._mod(count, 2) == 0 then
return (vals[count/2] + vals[count/2+1])/2
else
return vals[math.ceil(count/2)]
end
end

--[[
min

Finds the minimum argument

Usage:
{{#invoke:Math| min | value1 | value2 | ... }}
OR
{{#invoke:Math| min }}

When used with no arguments, it takes its input from the parent
frame. Note, any values that do not evaluate to numbers are ignored.
]]

function wrap.min(args)
return p._min(unpackNumberArgs(args))
end

function p._min(...)
local min_value = binary_fold((function(a, b) return a < b end), ...)
if min_value then
return min_value
end
end

--[[
sum

Finds the sum

Usage:
{{#invoke:Math| sum | value1 | value2 | ... }}
OR
{{#invoke:Math| sum }}

Note, any values that do not evaluate to numbers are ignored.
]]

function wrap.sum(args)
return p._sum(unpackNumberArgs(args))
end

function p._sum(...)
local sums, count = fold((function(a, b) return a + b end), ...)
if not sums then
return 0
else
return sums
end
end

--[[
average

Finds the average

Usage:
{{#invoke:Math| average | value1 | value2 | ... }}
OR
{{#invoke:Math| average }}

Note, any values that do not evaluate to numbers are ignored.
]]

function wrap.average(args)
return p._average(unpackNumberArgs(args))
end

function p._average(...)
local sum, count = fold((function(a, b) return a + b end), ...)
if not sum then
return 0
else
return sum / count
end
end

--[[
round

Rounds a number to specified precision

Usage:
{{#invoke:Math | round | value | precision }}

--]]

function wrap.round(args)
local value = p._cleanNumber(args[1] or args.value or 0)
local precision = p._cleanNumber(args[2] or args.precision or 0)
if value == nil or precision == nil then
return err('round input appears non-numeric')
else
return p._round(value, precision)
end
end

function p._round(value, precision)
local rescale = math.pow(10, precision or 0);
return math.floor(value * rescale + 0.5) / rescale;
end

--[[
log10

returns the log (base 10) of a number

Usage:
{{#invoke:Math | log10 | x }}
]]

function wrap.log10(args)
return math.log10(args[1])
end

--[[
mod

Implements the modulo operator

Usage:
{{#invoke:Math | mod | x | y }}

--]]

function wrap.mod(args)
local x = p._cleanNumber(args[1])
local y = p._cleanNumber(args[2])
if not x then
return err('first argument to mod appears non-numeric')
elseif not y then
return err('second argument to mod appears non-numeric')
else
return p._mod(x, y)
end
end

function p._mod(x, y)
local ret = x % y
if not (0 <= ret and ret < y) then
ret = 0
end
return ret
end

--[[
gcd

Calculates the greatest common divisor of multiple numbers

Usage:
{{#invoke:Math | gcd | value 1 | value 2 | value 3 | ... }}
--]]

function wrap.gcd(args)
return p._gcd(unpackNumberArgs(args))
end

function p._gcd(...)
local function findGcd(a, b)
local r = b
local oldr = a
while r ~= 0 do
local quotient = math.floor(oldr / r)
oldr, r = r, oldr - quotient * r
end
if oldr < 0 then
oldr = oldr * -1
end
return oldr
end
local result, count = fold(findGcd, ...)
return result
end

--[[
precision_format

Rounds a number to the specified precision and formats according to rules
originally used for {{template:Rnd}}. Output is a string.

Usage:
{{#invoke: Math | precision_format | number | precision }}
]]

function wrap.precision_format(args)
local value_string = args[1] or 0
local precision = args[2] or 0
return p._precision_format(value_string, precision)
end

function p._precision_format(value_string, precision)
-- For access to Mediawiki built-in formatter.
local lang = mw.getContentLanguage();
mw.log('e');
local value
value, value_string = p._cleanNumber(value_string)
precision = p._cleanNumber(precision)

-- Check for non-numeric input
if value == nil or precision == nil then
return err('invalid input when rounding')
end

local current_precision = p._precision(value)
local order = p._order(value)

-- Due to round-off effects it is neccesary to limit the returned precision under
-- some circumstances because the terminal digits will be inaccurately reported.
if order + precision >= 14 then
if order + p._precision(value_string) >= 14 then
precision = 13 - order;
end
end

-- If rounding off, truncate extra digits
if precision < current_precision then
value = p._round(value, precision)
current_precision = p._precision(value)

end

mw.log('d10', value);
mw.log('d10a', math.abs(value));
local formatted_num = lang:formatNum(math.abs(value))
mw.log('d11', formatted_num);
local sign

-- Use proper unary minus sign rather than ASCII default
if value < 0 then
sign = '−'
else
sign = ''
end

-- Handle cases requiring scientific notation
if string.find(formatted_num, 'E', 1, true) ~= nil or math.abs(order) >= 9 then
value = value * math.pow(10, -order)
current_precision = current_precision + order
precision = precision + order
formatted_num = lang:formatNum(math.abs(value))
mw.log('d', formatted_num);
else
order = 0;
end
formatted_num = sign .. formatted_num

-- Pad with zeros, if needed
if current_precision < precision then
local padding
if current_precision <= 0 then
if precision > 0 then
local zero_sep = lang:formatNum(1.1)
formatted_num = formatted_num .. zero_sep:sub(2,2)

padding = precision
if padding > 20 then
padding = 20
end

formatted_num = formatted_num .. string.rep('0', padding)
end
else
padding = precision - current_precision
if padding > 20 then
padding = 20
end
formatted_num = formatted_num .. string.rep('0', padding)
end
end

-- Add exponential notation, if necessary.
if order ~= 0 then
-- Use proper unary minus sign rather than ASCII default
if order < 0 then
order = '−' .. lang:formatNum(math.abs(order))
else
order = lang:formatNum(order)
end

formatted_num = formatted_num .. '×10' .. order .. ''
end

return formatted_num
end

--[[
Helper function that interprets the input numerically. If the
input does not appear to be a number, attempts evaluating it as
a parser functions expression.
]]

function p._cleanNumber(number_string)
if type(number_string) == 'number' then
-- We were passed a number, so we don't need to do any processing.
return number_string, tostring(number_string)
elseif type(number_string) ~= 'string' or not number_string:find('%S') then
-- We were passed a non-string or a blank string, so exit.
return nil, nil;
end

-- Attempt basic conversion
local number = tonumber(number_string)

-- If failed, attempt to evaluate input as an expression
if number == nil then
local success, result = pcall(mw.ext.ParserFunctions.expr, number_string)
if success then
number = tonumber(result)
number_string = tostring(number)
else
number = nil
number_string = nil
end
else
number_string = number_string:match("^%s*(.-)%s*$") -- String is valid but may contain padding, clean it.
number_string = number_string:match("^%+(.*)$") or number_string -- Trim any leading + signs.
if number_string:find('^%-?0[xX]') then
-- Number is using 0xnnn notation to indicate base 16; use the number that Lua detected instead.
number_string = tostring(number)
end
end

return number, number_string
end

--[[
Wrapper function that does basic argument processing. This ensures that all functions from #invoke can use either the current
frame or the parent frame, and it also trims whitespace for all arguments and removes blank arguments.
]]

local mt = { __index = function(t, k)
return function(frame)
if not getArgs then
getArgs = require('Module:Arguments').getArgs
end
return wrap[k](getArgs(frame)) -- Argument processing is left to Module:Arguments. Whitespace is trimmed and blank arguments are removed.
end
end }

return p

Module:Sandbox/Gnosygnu - Revision history

68.197.20.147 at 12:49, 12 August 2020