Re: [Pharo-users] Week number from a date
Chalten might help, i remember it had representations for months of years (January of 1990), it might have something similar for weeks. On 13 May 2016 at 05:40, Cédrick Béler wrote: > Yes I agree. We may have a preference to set the week day start (fistDayOfWeek > ?). > > > After that we could agree on the fact the first week is the first complete > week (otherwise it can be a preference). > > Then we need to find the first day index of the first fistDayOfWeek. > (Date year: self year day: 1) weekdayIndex > -> gives the index according to the preference (for now Sunday -> 1) > > Then it’s quite straightforward to get the week number. > > Just have to check if the current date is in the last week of the previous > year (returns 52 or 53). > I did something but not sure yet (but no preference). > > There are been some works on time representation (Chronos if I remember > well ? but cannot load in Pharo 5, depends on OSProcess). > > An interesting read [1]. > > Cheers, > > Cédrik > > ps: > http://stephane.ducasse.free.fr/Teaching/CoursAnnecy/0506-M1-COO/A%20New%20Object-Oriented%20Model%20of%20the%20Gregorian%20Calendar.pdf > > > > Interesting to know. But I see this already seems hard coded... > > Date nameOfDay: 1 "--> #Sunday" > > Timespan subclass: #Date > poolDictionaries: 'ChronologyConstants' > > ChronologyConstants class >> initialize > DayNames := #(Sunday Monday Tuesday Wednesday Thursday Friday Saturday). > > Also seems to have changed at some point, with the historical > nameOfDay recorded in the Terse Guide [1] circa 2010 shown to be > different. Perhaps this is something we should make a regional > preference. Was there any ongoing works on other regional > preferences? > >
Re: [Pharo-users] Week number from a date
Yes I agree. We may have a preference to set the week day start ( fistDayOfWeek ?) . After that we could agree on the fact the first week is the first complete week (otherwise it can be a preference). Then we need to find the first day index of the first fistDayOfWeek. (Date year: self year day: 1) weekdayIndex -> gives the index according to the preference (for now Sunday -> 1) Then it’s quite straightforward to get the week number. Just have to check if the current date is in the last week of the previous year (returns 52 or 53). I did something but not sure yet (but no preference). There are been some works on time representation (Chronos if I remember well ? but cannot load in Pharo 5, depends on OSProcess). An interesting read [1]. Cheers, Cédrik ps: http://stephane.ducasse.free.fr/Teaching/CoursAnnecy/0506-M1-COO/A%20New%20Object-Oriented%20Model%20of%20the%20Gregorian%20Calendar.pdf Interesting to know. But I see this already seems hard coded... Date nameOfDay: 1 "--> #Sunday" Timespan subclass: #Date poolDictionaries: 'ChronologyConstants' ChronologyConstants class >> initialize DayNames := #(Sunday Monday Tuesday Wednesday Thursday Friday Saturday). Also seems to have changed at some point, with the historical nameOfDay recorded in the Terse Guide [1] circa 2010 shown to be different. Perhaps this is something we should make a regional preference. Was there any ongoing works on other regional preferences?
Re: [Pharo-users] Week number from a date
--- Begin Message --- Thanks Ben Davide -- View this message in context: http://forum.world.st/Week-number-from-a-date-tp4894486p4894576.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. --- End Message ---
Re: [Pharo-users] Week number from a date
On Thu, May 12, 2016 at 9:47 PM, Davide Varvello via Pharo-users wrote: > > > -- Forwarded message -- > From: Davide Varvello > To: pharo-users@lists.pharo.org > Cc: > Date: Thu, 12 May 2016 06:10:12 -0700 (PDT) > Subject: Week number from a date > Hi guys, > > Is there a way to have the week number when a date is given? > > Ex: 2016/01/13 gives 2, 2016/01/19 gives 3, and so on It seems the answer is no. But to expand on how I determined that, in the interest of teaching how to fish... 1. Open World > Tools > Finder 2. Select examples 3. Enter Date readFromString: '2016/01/13' . 2016 4. Click This returns one result, the message #year. 5. Next trying Date readFromString: '2016/01/13' . 3 This returns no result. Think of the search term as an array of two objects separated by the period. The first object is the receiver of the message. The last object is the result. Any additional objects in between are message parameters. Try this one#(5 6 7 8) . 2 . #(5 6) On Fri, May 13, 2016 at 12:24 AM, Sven Van Caekenberghe wrote: > https://en.wikipedia.org/wiki/Week#Week_numbering > > of course, not all countries have the same definition of week. > furthermore, week number does not seem to be so simple. Interesting to know. But I see this already seems hard coded... Date nameOfDay: 1 "--> #Sunday" Timespan subclass: #Date poolDictionaries: 'ChronologyConstants' ChronologyConstants class >> initialize DayNames := #(Sunday Monday Tuesday Wednesday Thursday Friday Saturday). Also seems to have changed at some point, with the historical nameOfDay recorded in the Terse Guide [1] circa 2010 shown to be different. Perhaps this is something we should make a regional preference. Was there any ongoing works on other regional preferences? [1] http://wiki.squeak.org/squeak/5699 cheers -ben
Re: [Pharo-users] Week number from a date
--- Begin Message --- Yep :-) Davide Sven Van Caekenberghe-2 wrote > https://en.wikipedia.org/wiki/Week#Week_numbering > > of course, not all countries have the same definition of week. > furthermore, week number does not seem to be so simple. > >> On 12 May 2016, at 18:17, Cédrick Béler < > cdrick65@ > > wrote: >> >> Not sure it exists (I didn’t find it but it may exists)… so I did a quick >> try to code a new method in the class Week. >> >> There is already index but this method returns the index of the current >> month. >> >> I did something like below (not tested much): >> >> Week>>yearIndex >> >> ^ (self dayOfYear / 7 + 1) asInteger >> >> >> >> DateAndTime now asWeek yearIndexreturns 19 >> >> Maybe it would be better to create an equivalent method (weekYearIndex) >> in Date (or eventually Timespan). >> >> hth, >> >> Cédrik >> -- View this message in context: http://forum.world.st/Week-number-from-a-date-tp4894486p4894535.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. --- End Message ---
Re: [Pharo-users] Week number from a date
What I did is wrong. It needs to add the first month days offset :)
Re: [Pharo-users] Week number from a date
https://en.wikipedia.org/wiki/Week#Week_numbering of course, not all countries have the same definition of week. furthermore, week number does not seem to be so simple. > On 12 May 2016, at 18:17, Cédrick Béler wrote: > > Not sure it exists (I didn’t find it but it may exists)… so I did a quick try > to code a new method in the class Week. > > There is already index but this method returns the index of the current month. > > I did something like below (not tested much): > > Week>>yearIndex > > ^ (self dayOfYear / 7 + 1) asInteger > > > > DateAndTime now asWeek yearIndexreturns 19 > > Maybe it would be better to create an equivalent method (weekYearIndex) in > Date (or eventually Timespan). > > hth, > > Cédrik >
Re: [Pharo-users] Week number from a date
Not sure it exists (I didn’t find it but it may exists)… so I did a quick try to code a new method in the class Week. There is already index but this method returns the index of the current month. I did something like below (not tested much): Week>>yearIndex ^ (self dayOfYear / 7 + 1) asInteger DateAndTime now asWeek yearIndex returns 19 Maybe it would be better to create an equivalent method (weekYearIndex) in Date (or eventually Timespan). hth, Cédrik
[Pharo-users] Week number from a date
--- Begin Message --- Hi guys, Is there a way to have the week number when a date is given? Ex: 2016/01/13 gives 2, 2016/01/19 gives 3, and so on TIA Davide -- View this message in context: http://forum.world.st/Week-number-from-a-date-tp4894484.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. --- End Message ---
