i got the answer what i am expecting but can u explain me

(Time.now - Time.mktime(*ParseDate.parsedate((t.created_at).to_s)))
what exactly this line does"
Time.mktime(*ParseDate.parsedate((t.created_at).to_s)) "


On Wed, Aug 29, 2012 at 2:36 PM, Swati Verma wrote:

You can do

(Time.now - Time.mktime(*ParseDate.parsedate((t.created_at).to_s)))

On Wed, Aug 29, 2012 at 12:18 PM, keerthi wrote:

@colin here i found in console
@bio = Biometric.find(36457)
=> #<Biometric id: 36457, rfid: 0, userid: 3, date_time: "2012-08-29
09:30:00", checkin_checkout: nil, forget: nil, reason: nil, entered_by:
nil, created_at: "2012-08-29 09:30:00", updated_at: "2012-08-29 09:30:00",
RealCheckIn: nil, MACHINENO: nil>
@first = @bio.date_time.to_i
=> 1346232600
@now = Time.now
=> Wed Aug 29 12:13:46 +0530 2012
@time_now = @now.to_i
=> 1346222626
@time_now - @first
=> -9974

@first = @bio.date_time
=> Wed, 29 Aug 2012 09:30:00 UTC +00:00
with out converting to to_i
@now = Time.now
=> Wed Aug 29 12:16:48 +0530 2012
with out converting to_i

as i found was my date from database is in UTC format and when it comes
to Time.now its not UTC


how can i solve it

Cheers



On Tue, Aug 28, 2012 at 9:28 PM, Colin Law wrote:

On 28 August 2012 16:40, sameena Khan <emailtosameenakhan@gmail.com>
wrote:
@colin if i have two timings9:30 PM and 10:52 i got correct output here it
is 10 hours : 38mins
and if i give Time.now as one input and 10:30 AM as another input i got 2
hours : mins
The best thing is to put in some diagnostic code and work out what is
happening. Remember Time.now is not a time of day it is a date and
time. Hopefully your other times are also full date and time objects.

Colin

i dont think it is timezone issue because if there are two fixed
inputs and
if i subtract them with my code i get the correct output the only issue is
with Time.now as a input i guess. i wanna calculate the working hours with
mins of an employee. As i explained before if the employee checkin and
checkout time is there i can able to calculate it and if i wanna show right
from his checkin until he checkout every min of his working hours and mins i
have to go for Time.now as another input.

On Tue, Aug 28, 2012 at 8:05 PM, Colin Law <clanlaw@googlemail.com>
wrote:
On 28 August 2012 15:18, Khan wrote:
Hey everyone

i am trying to subtract two different times.i am getting
right
when i have two fixed times.
here is my code


def hour_min(last,first)

difference = last - first
seconds = difference % 60
difference = (difference - seconds) / 60
minutes = difference % 60
difference = (difference - minutes) / 60
hours = difference % 24

return hours,minutes

end
if last =9:30 PM and first = 10:52 i get after subtraction 10 hours
: 38
mins but the problem is with Time.now
if last = Time.now and first = 10:30 am it is give improper output



this is my view
<% hour_min = hour_min(Time.now.to_i,cin.first.to_i)%>
You should not need to call to_i, just pass in the times, the
difference of two times is the difference in seconds.

If i don't call with to_i the output will be with decimal(i.e., 3.o hours )
to convert them i went with to_i
<%="#{hour_min[0]}Hour : #{hour_min[1]}Min"%>

My problem is if i have two fixed timings i am getting correct but
when
i
have to calculate with Time.now i am getting wrong answer can any
one
help
me out
Have a look at the Rails Guide on debugging which will show you
techniques that can be used to debug the code. I would start just by
running the console (rails c) and try calling your method with various
values and see what happens. You can use puts in the method to print
intermediate results and see what is happening.

What results are you getting? Is it a number of hours out? If so
then I guess it is a time zone issue.

Colin

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