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lua/niknaks/modules/sh_timedelta.lua
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290
lua/niknaks/modules/sh_timedelta.lua
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--[[
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| This file was obtained through the combined efforts
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| of Madbluntz & Plymouth Antiquarian Society.
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|
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| Credits: lifestorm, Gregory Wayne Rossel JR.,
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| Maloy, DrPepper10 @ RIP, Atle!
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|
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| Visit for more: https://plymouth.thetwilightzone.ru/
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--]]
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-- Copyright © 2022-2072, Nak, https://steamcommunity.com/id/Nak2/
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-- All Rights Reserved. Not allowed to be reuploaded.
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-- License: https://github.com/Nak2/NikNaks/blob/main/LICENSE
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--- @class TimeDelta
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--- @operator add:TimeDelta|DateTime
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--- @operator sub:TimeDelta|DateTime
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--- @operator mul:TimeDelta
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--- @operator div:TimeDelta
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--- @operator pow:TimeDelta
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--- @operator mod:TimeDelta
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local meta = {}
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meta.__index = meta
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meta.MetaName = "TimeDelta"
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NikNaks.__metatables["TimeDelta"] = meta
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--- @class TimeDeltaModule
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--- @operator call:TimeDelta
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local TimeDelta = {}
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TimeDelta.Milisecond = 0.001
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TimeDelta.Second = 1
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TimeDelta.Minute = 60
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TimeDelta.Hour = 3600
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TimeDelta.Day = 86400
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TimeDelta.Week = 604800
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TimeDelta.Year = 31536000
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TimeDelta.Decade = 315359654
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TimeDelta.Century = 3153596543
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TimeDelta._steps = { "Year", "Day", "Hour", "Minute", "Second", "Milisecond" }
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setmetatable( TimeDelta, {
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__index = TimeDelta,
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__call = function( _, time )
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return setmetatable( { time = time }, meta )
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end
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} )
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NikNaks.TimeDelta = TimeDelta
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do
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local abs = math.abs
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local floor = math.floor
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local steps = TimeDelta._steps
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--- Returns the time as a table
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--- @return table
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function meta:ToTable()
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if self._tab then return self._tab end
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local t = {}
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local num = abs( self.time )
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local f = self.time < 0 and -1 or 1
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local isLeapYear = NikNaks.DateTime.IsLeapYear
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local function processStep( i )
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local step = steps[i]
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local value = steps[step]
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-- Leap year
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if num < value then return end
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if i == 1 then -- Since years aren't whole numbers, we need to round the tiniest amount, or floor is going to count down.
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local n = 0
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local y = TimeDelta.Year
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local v = isLeapYear( y ) and 31622400 or 31536000
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while num >= v do
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local q = 1 * f
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if num >= v then
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n = n + 1
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num = num - v
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y = y + q
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v = isLeapYear( y ) and 31622400 or 31536000
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else
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break
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end
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end
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t[s] = n * f
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else
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local n = floor( num / v )
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t[s] = n * f
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num = num - v * n
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end
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end
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for i = 1, #steps do
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processStep( i )
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end
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self._tab = t
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return t
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end
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end
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-- Getters
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do
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--- Generic getter function to get the time amount of the given time type
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--- @param key string The name of the time type to get
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--- @return number
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function meta:_getter( key )
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return self.time / TimeDelta[key]
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end
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function meta:GetMiliseconds() return self:_getter( "Milisecond" ) end
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function meta:GetSeconds() return self:_getter( "Second" ) end
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function meta:GetMinutes() return self:_getter( "Minute" ) end
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function meta:GetHours() return self:_getter( "Hour" ) end
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function meta:GetDays() return self:_getter( "Day" ) end
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function meta:GetWeeks() return self:_getter( "Week" ) end
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function meta:GetMonths() return self:_getter( "Month" ) end
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function meta:GetYears() return self:_getter( "Year" ) end
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function meta:GetDecades() return self:_getter( "Decade" ) end
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function meta:GetCenturies() return self:_getter( "Century" ) end
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end
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-- Adders
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do
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--- Generic adder function to add given time amount to the TimeDelta
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--- @param key string The name of the time type to add
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--- @param num number The amount of time to add
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--- @return self TimeDelta
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function meta:_adder( key, num )
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self.time = self.time + ( num * TimeDelta[key] )
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self._tab = nil
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return self
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end
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--- @param n number
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function meta:AddMiliseconds( n ) return self:_adder( "Milisecond", n ) end --- @param n number
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function meta:AddSeconds( n ) return self:_adder( "Second", n ) end --- @param n number
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function meta:AddMinutes( n ) return self:_adder( "Minute", n ) end --- @param n number
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function meta:AddHours( n ) return self:_adder( "Hour", n ) end --- @param n number
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function meta:AddDays( n ) return self:_adder( "Day", n ) end --- @param n number
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function meta:AddWeeks( n ) return self:_adder( "Week", n ) end --- @param n number
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function meta:AddMonths( n ) return self:_adder( "Month", n ) end --- @param n number
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function meta:AddYears( n ) return self:_adder( "Year", n ) end --- @param n number
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function meta:AddDecades( n ) return self:_adder( "Decade", n ) end --- @param n number
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function meta:AddCenturies( n ) return self:_adder( "Century", n ) end --- @param n number
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end
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-- Subtractors
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do
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--- Generic subtractor function to subtract given time amount from the TimeDelta
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--- @param key string The name of the time type to subtract
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--- @param num number The amount of time to subtract
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--- @return self TimeDelta
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function meta:_subtractor( key, num )
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self.time = self.time - ( num * TimeDelta[key] )
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self._tab = nil
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return self
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end
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function meta:SubMiliseconds( n ) return self:_subtractor( "Milisecond", n ) end --- @param n number
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function meta:SubSeconds( n ) return self:_subtractor( "Second", n ) end --- @param n number
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function meta:SubMinutes( n ) return self:_subtractor( "Minute", n ) end --- @param n number
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function meta:SubHours( n ) return self:_subtractor( "Hour", n ) end --- @param n number
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function meta:SubDays( n ) return self:_subtractor( "Day", n ) end --- @param n number
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function meta:SubWeeks( n ) return self:_subtractor( "Week", n ) end --- @param n number
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function meta:SubMonths( n ) return self:_subtractor( "Month", n ) end --- @param n number
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function meta:SubYears( n ) return self:_subtractor( "Year", n ) end --- @param n number
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function meta:SubDecades( n ) return self:_subtractor( "Decade", n ) end --- @param n number
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function meta:SubCenturies( n ) return self:_subtractor( "Century", n ) end --- @param n number
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end
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-- ToString
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do
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local abs = math.abs
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local steps = TimeDelta._steps
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function meta:__tostring()
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local str
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local si = 0
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local tab = self:ToTable()
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local kv = #table.GetKeys( tab )
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for i = 1, #steps do
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local step = steps[i]
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if tab[step] then
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si = si + 1
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local number = abs( tab[step] )
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local middle = ( si == kv and " and " or ", " )
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step = number == 1 and step or step .. "s"
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if not str then
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str = number .. " " .. step
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else
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str = str .. middle .. number .. " " .. step
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end
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end
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end
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return str or "nil"
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end
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end
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function meta:IsNegative()
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return self.time < 0
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end
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function meta:IsPositive()
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return self.time >= 0
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end
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-- Operations
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do
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--- @param b TimeDelta|number
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--- @return TimeDelta|DateTime
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function meta:__add( b )
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if isnumber( b ) then
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return TimeDelta( self.time + b )
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end
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if self.unix and b.time then
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return NikNaks.DateTime( self.unix + b.time )
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elseif b.unix and self.time then
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return NikNaks.DateTime( b.unix + self.time )
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end
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end
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--- @param b TimeDelta|number
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--- @return TimeDelta|DateTime
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function meta:__sub( b )
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if isnumber( b ) then
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return TimeDelta( self.time - b )
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end
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if self.unix and b.time then
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return NikNaks.DateTime( self.unix - b.time )
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elseif b.unix and self.time then
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return NikNaks.DateTime( b.unix - self.time )
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end
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end
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--- @param b TimeDelta|number
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--- @return TimeDelta
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function meta:__mul( b )
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b = isnumber( b ) and b or b.time
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return TimeDelta( self.time * b )
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end
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--- @param b TimeDelta|number
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--- @return TimeDelta
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function meta:__div( b )
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b = isnumber( b ) and b or b.time
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return TimeDelta( self.time / b )
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end
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--- @param b TimeDelta|number
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--- @return TimeDelta
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function meta:__pow( b )
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b = isnumber( b ) and b or b.time
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return TimeDelta( self.time ^ b )
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end
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--- @param b TimeDelta|number
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--- @return TimeDelta
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function meta:__mod( b )
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b = isnumber( b ) and b or b.time
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return TimeDelta( self.time % b )
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end
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--- @param b TimeDelta
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function meta:__eq( b )
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return self.time == b.time
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end
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--- @param b TimeDelta
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function meta:__lt( b )
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return a.time < b.time
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end
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--- @param b TimeDelta
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function meta.__le( b )
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return a.time <= b.time
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end
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end
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