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Time / date and timers
Other Standard Library features. example from a Well House Consultants training course
More on Other Standard Library features. [link]
Source code: timtimer Module: U112
--[[

-- os.clock return current cpu seconds for this process
-- os.time returns seconds from 1.1.1970 (universal time)
-- os.date returns a formatted date and time
]]


-- get current cycles
sofar = os.clock()

-- year month and day mandatory to os.time

whc = os.time({year=1995, month=6, day=19})
print ("Well House Consultants was founded at "..whc)
snow = os.time()
print ("It is now "..snow)

-- os.date returns a formatted date string
-- OR a table of date information suitbable for os.time

now = os.date("*t") -- defaults to current date and time
nowutc = os.time(now)
print ("It is now "..nowutc.. " which works out as")
for n,v in pairs(now) do
        print (n,v)
end

in_180_days = nowutc + 180 * 24 * 3600
booking_until = os.date("%a %d %B %Y, %I%p",in_180_days)
print ("\nBooking for 180 days - that's until "..booking_until)

dateparams = [[Full parameter range to os.date
%a (abbreviated weekday name)
%A (full weekday name)
%b (abbreviated month name)
%B (full month name)
%c (date and time)
%d (day of the month)
%H (hour, using a 24-hour clock)
%I (hour, using a 12-hour clock)
%M (minute)
%m (month)
%p (either "am" or "pm")
%S (second)
%w (weekday)
%x (date)
%X (time)
%Y (full year)
%y (two-digit year )
%% (the character '%')
]]

os.setlocale("en_GB") -- Switches date and time formats
itsnow = os.date(dateparams)
print ("\nCurrent date and time format elements\n"..itsnow)

n=0
for i=1,1000000 do n = n + i end

sof2 = os.clock()
print ("Job took "..sof2 - sofar)

--[[ ------------------ Sample output ----------------------------
[trainee@easterton u112]$ lua timtimer
Well House Consultants was founded at 803559600
It is now 1214639862
It is now 1214639862 which works out as
hour 8
min 57
wday 7
day 28
month 6
year 2008
sec 42
yday 180
isdst true

Booking for 180 days - that's until Thu 25 December 2008, 07AM

Current date and time format elements
Full parameter range to os.date
Sat (abbreviated weekday name)
Saturday (full weekday name)
Jun (abbreviated month name)
June (full month name)
Sat 28 Jun 2008 08:57:42 BST (date and time)
28 (day of the month)
08 (hour, using a 24-hour clock)
08 (hour, using a 12-hour clock)
57 (minute)
06 (month)
AM (either "am" or "pm")
42 (second)
6 (weekday)
28/06/08 (date)
08:57:42 (time)
2008 (full year)
08 (two-digit year )
% (the character '%')

Job took 0.28
[trainee@easterton
]]


Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Lua
 * Lua Programming
 * Lua Programming
Also available on on site courses for larger groups

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Other Examples
This example comes from our "Other Standard Library features." training module. You'll find a description of the topic and some other closely related examples on the "Other Standard Library features." module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

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