模块:MathUtil
此模块的文档可以在模块:MathUtil/doc创建
local util_args = require('Module:ArgsUtil')
local util_text = require('Module:TextUtil')
-- MathUtil
local p = {}
function p.sign(v)
if v == 0 then return 0 end
return (v > 0 and 1) or -1
end
function p.printWithSign(v)
return (v > 0 and ('+%s'):format(v)) or v
end
function p.roundnum(v, bracket)
bracket = bracket or 1
return math.floor(v/bracket + p.sign(v) * 0.5) * bracket
end
function p.percent(v, bracket)
return p.roundnum(v * 100, bracket or 2) .. '%'
end
function p.mod(a, b)
return a - math.floor(a/b)*b
end
function p.sum(tbl)
local total = 0
for _, v in pairs(tbl) do
total = total + v
end
return total
end
function p.tonumber(str)
if not str then return nil end
local raw_number = str:gsub(',','')
return tonumber(raw_number)
end
function p.formatNumber(str)
local num = tonumber(str)
if num then
return mw.getLanguage('en'):formatNum(num)
else
return str
end
end
function p.serializeNumber(N)
local chr = tostring(N):sub(-1)
local lookup = { ['1'] = 'st', ['2'] = 'nd', ['3'] = 'rd' }
return N .. (lookup[chr] or 'th')
end
function p.deserialize(str)
local deserialized = str:gsub('[A-Za-z]*','')
if deserialized == '' then
return nil
end
return deserialized
end
function p.deserializeRangeToTable(str)
str = str:gsub('[A-Za-z]*','')
return util_args.splitAndMap(str, '%-', tonumber)
end
function p.padleft(num, digits)
local str = tostring(num)
local tbl = util_text.split(str, '')
local len = #tbl
local outputTbl = {}
for k = 1, len do
outputTbl[k] = tbl[len + 1 - k]
end
for k = len + 1, digits do
outputTbl[k] = '0'
end
local outputReversed = table.concat(outputTbl, '')
return outputReversed:reverse()
end
return p
