Help with os.difftime()

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#1

I’m trying to calculate the time difference beetween 2 times using Difftime() os | Roblox Creator Documentation but to do this I need to format in “time_t format” http://en.cppreference.com/w/cpp/chrono/c/time_t

My code is:

		local Time1 = os.clock()
		wait(math.random(1,60))
		local Time2 = os.clock()
		local WaitTime = os.difftime(Time1,Time2)
		print(WaitTime)

All help is appreciated.

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#2

You can just subtract “Time1” from “Time2” and you’ll get the time that has elapsed.
Example:

        local Time1 = os.clock()
		wait(math.random(1-60))
		local Time2 = os.clock()
		local WaitTime = Time2-Time1
		print(WaitTime)
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#3

I get an error
image
Any ideas?

1 Like
#4

Can I see your script because that shouldn’t happen since os.clock() returns a number

1 Like
#5

The one where this is being used?

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#6

the script that caused the error

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#7 
local Event = game:GetService("ReplicatedStorage"):WaitForChild("Technica_Replicated"):WaitForChild("Technica_Remote")
local RunService = game:GetService("RunService")


local Plr_Recording
local Ref = 0
local Cue_Start_Time
local Cue_End_Time
local New_Key_Time
local Prev_Key_Time
local Temp_Wait_Time
local Recording_Key_Press = false
local Cue_Total_Length
local first_run

return  {
	Start_Recording = function(Plr)
		warn("Sarting Key Press Recording")
		spawn(function()
			first_run = true
			Recording_Key_Press = true
			Plr_Recording = Plr
			Temp_Data = table.create(1)
			Ref = 0
			Cue_Start_Time = os.time()
			print(Cue_Start_Time)
			RunService.Stepped:Connect(function(step)
				Event.OnServerEvent:Connect(function(Plr,Query1,Query2)
					if Recording_Key_Press == true then
						New_Key_Time = os.time()
						print(New_Key_Time)
						if first_run == true then
							Temp_Wait_Time = New_Key_Time-Cue_Start_Time
							first_run = false
						elseif first_run == false then
							Temp_Wait_Time = New_Key_Time-Prev_Key_Time -- I get an error here
						end
						if Plr == Plr_Recording then
							Ref = Ref + 1
							local Key_Data = {
								Ref,
								Temp_Wait_Time,
								Query1,
								Query2
							}
							print(Key_Data)
							Temp_Data = table.insert(Key_Data)
							Prev_Key_Time = os.clock()
							print(Prev_Key_Time)
						end
					end
				end)
			end)
		end)
	end,
	End_Recording = function(Plr)
		warn("Finished Key Press Recording")
		Cue_End_Time = os.time()
		print(Cue_End_Time)
		Recording_Key_Press = false
		Cue_Total_Length = Cue_Start_Time-Cue_End_Time
		print(Cue_Total_Length)
		print(Temp_Data)
	end,
}
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#8

can you add a comment to the line the script errored?

1 Like
#9

It seems that “Prev_Key_Time” was never initialized

#10

image
But it is… thats why im confused

#11

That is because it was declared after the line where it errored

#12

But for it to work as intended it has to go there or else I can not calculate the exact time to wait. Unless there is better way to do it.

#13

You initialize it with a default value, possibly ‘0’ to prevent the error.

1 Like