Help my friends,
Again I am banging my head for hours…
It is very simple in old AppleScript, but ASOC is not…
I wonder if someone could help me get the last day of a given month in ASOC.
Thanks,
The trick in all programming languages is the first day of next month - 24 hours
Thanks DJ.
I am really looking for some nice lines of code.
I can’t do thing in the old way such as:
date(current date) + (32 * days)
Any help?
Thanks
Why can’t you? In my latest app, I used date stuff and it worked perfectly.
set theDate to (current date)
set newDate to theDate + (32 * days)
Now newDate is the date you were looking for.
Really? I cut and pasted your code, and I got a date that is 32 days from now – 9/19/2011.
One way that worked for me was :
set inputFormatter to current application's NSDateFormatter's alloc()'s init()
inputFormatter's setDateFormat_("MM/yy")
set theDate to inputFormatter's dateFromString_("09/11")
set lastDay to theDate's dateByAddingTimeInterval_(-86400)
log lastDay -- gives last day of August
That’s a cocoa way to do it. An applescript way is :
set theDate to date "9/1/11"
set newDate to theDate - (1 * days)
log newDate as string
This is before compiling. When you compile the “9/1/11” will be changed to “Thursday, September 1, 2011 12:00:00 AM”. NewDate should give you the last day of August.
Ric
Nonono. That was just an example. I was just reminding him that newDate is the variable containing the result of the date procedure. Now I’m just confusing myself… 
Anyway, it was an example.
This is it:
on clickTheButton_(sender)
GetLastDayOfMonth_("2")
end clickTheButton_
on GetLastDayOfMonth_(theMonth)
(*** let's start with today: ***)
set theDate to current date
set month of theDate to theMonth
log "theDate: " & theDate
set newDate to theDate + (32 * days)
log "newDate step 1: " & newDate as string
set day of newDate to 1
log "newDate step 2: " & newDate as string
set newDate to newdate - (1 * days)
log "newDate step 3: " & newDate
set d to day of newDate
log "d is: " & d
if d < 10 then set theDay to "0" & d
set m to month of newDate
set m to m as number
if m < 10 then set m to ("0" & m) as string
log "m is: " & m
set y to year of newDate
log "y is : " & y
log "last day of month is: "& d & "." & m & "." & y
return d & "." & m & "." & y
end GetLastDayOfMonth_
I don’t think this method will work if the current date is near the end of the month (you can test this by replacing the “set theDate to current date” line with – set theDate to date “8/30/11” – and try passing 2 to the method).
If you want to get the last day of a particular month in the current year by passing the month number to it, I think this will work:
on clickTheButton_(sender)
GetLastDayOfMonth_(2)
end clickTheButton_
on GetLastDayOfMonth_(theMonth)
if theMonth = 12 then
set dateString to "01/01/" & ((year of the (current date)) + 1 as string)
else
set dateString to ((theMonth + 1) as string) & "/01/" & (year of the (current date) as string)
end if
set inputFormatter to current application's NSDateFormatter's alloc()'s init()
inputFormatter's setDateFormat_("MM/dd/yy")
set theDate to inputFormatter's dateFromString_(dateString)
set lastDay to theDate's dateByAddingTimeInterval_(-86400)
set outputFormatter to current application's NSDateFormatter's alloc()'s init()
outputFormatter's setDateFormat_("dd/MM/yy")
log outputFormatter's stringFromDate_(lastDay)
end GetLastDayOfMonth_
Using a formatter for the output lets you format the date however you want in a more elegant way than using applescript methods (in my opinion).
A shorter and all applescript way to do it is with a list:
on GetLastDayOfMonth_(theMonth)
set theYear to the year of the (current date)
if (theYear - 2000) mod 4 = 0 and theMonth = 2 then set theMonth to 13
set theList to {"31/01/", "28/02/", "31/03/", "30/04/", "31/05/", "30/06/", "31/07/", "31/08/", "30/09/", "31/10/", "30/11/", "31/12/", "29/02/"}
set lastDay to (item theMonth of the theList) & theYear
log lastDay
end GetLastDayOfMonth_
Ric
Hi,
this is a pure Cocoa/ASOC solution
property NSDate : class "NSDate"
property NSCalendar : class "NSCalendar"
property NSDateComponents : class "NSDateComponents"
on lastDayOfMonth_(theMonth) -- returns a date object
set currentDate to NSDate's |date|
set calendar to NSCalendar's currentCalendar
-- the constant 12 is the equivalent to NSYearCalendarUnit|NSMonthCalendarUnit
set components to calendar's components_fromDate_(12, currentDate)
components's setMonth_(theMonth +1)
components's setDay_(0)
return calendar's dateFromComponents_(components)
end lastDayOfMonth
I think eventually I will have to go all cocoa…
Sorry for late reply. But Stefan’s post is what I meant.
Many thanks to all of you my friends.
Stefan:
One last request please:
How do I convert the result into string?
Thanks!
If your local string representation is sufficient, call the description method of the date object.
If you need a special format, use NSDateFormatter
Stefan,
components's setDay_(0)
Is the fact that setting the day to 0, takes you back to the last day of the previous month documented somewhere? I didn’t see that in the docs anywhere.
Ric
From the Date and Time Programming Guide:
In a calendar, day, week, weekday, month, and year numbers are generally 1-based
The class of the parameter for setDay: is NSInteger, therefore negative numbers might be valid.
I conclude, that setting the day to 0 means t - 1 day
But that doesn’t seem to be what’s happening – if you change your 12 to 28 in this line: set components to calendar’s components_fromDate_(12, currentDate), that includes the NSDayCalendarUnit. Now, if you log the dateFromComponents before setting the day to 0, you will get <month+1>/19/2011. But setting the day to 0 still gives you the last day of the month before. So, it looks like it is more than t-1 day.
Ric
Of course, setting the day to 0 changes the value of the day component anyway regardless of the previous state.
Omitting the NSDayCalendarUnit mask sets the day component to 1