Jan Karlsson: 1 version importerades

2021-01-05T08:10:17Z

1 version importerades

← Äldre version	Versionen från 5 januari 2021 kl. 08.10
(Ingen skillnad)

jarnvagsdata>Johnuniq: clean whitespace; remove unintended global orig_precision which gives errors when used with a module that invokes Module:No globals such as 1994–95 Yemeni League

2019-09-14T01:55:35Z

clean whitespace; remove unintended global orig_precision which gives errors when used with a module that invokes Module:No globals such as 1994–95 Yemeni League

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Jan Karlsson: 1 version importerades

2019-06-04T10:25:09Z

1 version importerades

← Äldre version	Versionen från 4 juni 2019 kl. 10.25
(Ingen skillnad)

Jan Karlsson: 1 version importerades

2019-02-23T14:10:13Z

1 version importerades

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Maps>Primefac: fix calculation

2018-09-30T23:27:34Z

fix calculation

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jarnvagsdata_se>Larske: inför möjligheten att avstå från avrundning

2018-05-27T18:17:14Z

inför möjligheten att avstå från avrundning

← Äldre version		Versionen från 27 maj 2018 kl. 18.17
Rad 538:		Rad 538:
	-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234		-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234
	local lang = mw.language.new( 'sv' )		local lang = mw.language.new( 'sv' )
	if diff == 0 then
			if diff == 0 or frame.norounding then
	return lang:formatNum(tonumber(frame.amount))		return lang:formatNum(tonumber(frame.amount))
	else		else
Rad 557:		Rad 558:
	-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234		-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234
	local lang = mw.language.new( 'sv' )		local lang = mw.language.new( 'sv' )
	if diff == 0 then		if diff == 0 or frame.norounding then
	return tonumber(frame.amount)		return tonumber(frame.amount)
	else		else

Jan Karlsson: 1 version importerades

2018-03-14T21:48:45Z

1 version importerades

Ny sida

--[[

This module provides a number of basic mathematical operations.

]]

local yesno, getArgs -- lazily initialized

local p = {} -- Holds functions to be returned from #invoke, and functions to make available to other Lua modules.
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 applyFuncToArgs(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

--[[
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 function maxOfTwo(a, b)
if a > b then
return a
else
return b
end
end
local max_value = applyFuncToArgs(maxOfTwo, ...)
if max_value then
return max_value
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 function minOfTwo(a, b)
if a < b then
return a
else
return b
end
end
local min_value = applyFuncToArgs(minOfTwo, ...)
if min_value then
return min_value
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 function getSum(a, b)
return a + b
end
local sum, count = applyFuncToArgs(getSum, ...)
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

--[[
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 = applyFuncToArgs(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();

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
orig_precision = p._precision(value_string)
if order + orig_precision >= 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

local formatted_num = lang:formatNum(math.abs(value))
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))
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 }

--En funktion som ska hjälpa Modul:Wikidata att få rätt avrundning på sina siffror
function p.newFromWikidataValue(frame)
local upperBound = frame.upperBound or frame.amount
local lowerBound = frame.lowerBound or frame.amount
local diff = math.abs(tonumber(upperBound) - tonumber(frame.amount))
local diff2 = math.abs(tonumber(lowerBound) - tonumber(frame.amount))
if diff2 > diff then
diff = diff2
end
-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234
local lang = mw.language.new( 'sv' )
if diff == 0 then
return lang:formatNum(tonumber(frame.amount))
else
local log = -math.log10(diff)
return lang:formatNum(p._round(frame.amount, math.ceil(log)))
end
end

--Samma som ovan, men hoppar den där delen om firnatering av siffrorna
function p.newFromWikidataValueR(frame)
local upperBound = frame.upperBound or frame.amount
local lowerBound = frame.lowerBound or frame.amount
local diff = math.abs(tonumber(upperBound) - tonumber(frame.amount))
local diff2 = math.abs(tonumber(lowerBound) - tonumber(frame.amount))
if diff2 > diff then
diff = diff2
end
-- TODO, att fixa så att inte 1234.000 'huggs av' till 1234
local lang = mw.language.new( 'sv' )
if diff == 0 then
return tonumber(frame.amount)
else
local log = -math.log10(diff)
return p._round(frame.amount, math.ceil(log))
end
end

-- avrunda, avrundar ett tal till önskat antal decimaler eller värdesiffror
--
-- parametrar
-- ==========
-- varde (obligatorisk): det värde som ska avrundas, till exempel 12.467. det går bra med negativa tal
-- decimaler (frivillig): det antal decimaler som önska, till exempel 2. om decimaler ej anges används 0.
-- vardesiffror (frivillig): det antal värdesiffor som önskas, till exempel 3. denna parameter överrider parametern decimaler.
--
-- exempel
-- =======
-- {{#invoke:Math|avrunda|varde=12.658|decimaler=2}}
-- ger resultatet
-- 12.66
-- {{#invoke:Math|avrunda|varde=-12.658|vardesiffror=3}}
-- ger resultatet
-- -12.7
-- {{#invoke:Math|avrunda|varde=12.658}}
-- ger resultatet
-- 13

function p.avrunda(frame)
local varde = tonumber(frame.args['varde']) or 0
local multiply = 1
if varde < 0 then
multiply = -1
varde = -varde
end
local decimaler = frame.args['decimaler'] or 0
local vardesiffror = frame.args['vardesiffror']
if (vardesiffror) then
decimaler = tonumber(vardesiffror)-math.floor(math.log(varde)/math.log(10))-1
end
local res = '' .. multiply * math.floor(varde*10^decimaler+0.5)/10^decimaler
if tonumber(decimaler) > 0 then
if not string.match(res, '%.') then
res = res .. '.'
end
decimalerna = string.sub(string.match(res .. '000000000000000000','%..*'),2,decimaler+1)
res = string.match(res, '.*%.') .. decimalerna
end
return res
end

return setmetatable(p, mt)

Modul:Math - Versionshistorik

Jan Karlsson: 1 version importerades

jarnvagsdata>Johnuniq: clean whitespace; remove unintended global orig_precision which gives errors when used with a module that invokes Module:No globals such as 1994–95 Yemeni League

Jan Karlsson: 1 version importerades

Jan Karlsson: 1 version importerades

Maps>Primefac: fix calculation

jarnvagsdata_se>Larske: inför möjligheten att avstå från avrundning

Jan Karlsson: 1 version importerades