We generally use upTo: when excluding like in Stream and primesUpTo:

Le sam. 11 mai 2019 à 20:05, Chris Cunningham <cunningham.cb at gmail.com> a
écrit :

> That does explain it.  So, datesDo: is fine.
>
> Timespan>>to: is the method at issue.  The right-open intenterval is what
> tripped me up. Other implementations of #to: are right closed: (1 to: 2)
> includes 2, for instance, whereas (Date yesterday to: Date today) does not
> include today.
>
> Time to: makes sense to me: '01:00:00' asTime to: '02:00:00' asTime being
> 1 hour makes sense to me, since it is a particular point in time to another
> particular point in time.
> The Day to Day - I guess just assuming the 2nd day means the beginning of
> the day instead of the end of the day is what gets me.
>
> I'd excpect Date today to: Date today to be today - not an empty timespan.
>
> Maybe I just need to get over it.
> But what I'd expect is the the end part of the timespan #to: to use the
> end of the ending timespan,if possible.
>
> Thanks,
> cbc
>
> On Fri, May 10, 2019 at 3:40 PM Levente Uzonyi <leves at caesar.elte.hu>
> wrote:
>
>> On Fri, 10 May 2019, Chris Cunningham wrote:
>>
>> > So, this code:   Date today asMonth datesDo: [:date| Transcript cr;
>> show: date yyyymmdd]
>> > prints out each day in the month.  That is what I'd expect.
>> >
>> > This code:
>> >   |mth|
>> >   mth := Date today asMonth.
>> >   (mth start asDate to: mth end asDate) datesDo: [:date| Transcript cr;
>> show: date yyyymmdd]
>> > does not print the last date.
>> >
>> > This has bitten me.  If I add a nanosecond onto the end date (mth end
>> asDate + 1) it does include the last date - but that is ugly.  And
>> dangerous if I have other code that carefully picks the following date
>> start to work around this oddity.
>> >
>> > Thoughts?
>>
>> I wrote a mail about this just two months ago[1]. Timespan, unlike
>> Interval, is a right-open interval. It has to be in order to have the
>> expected length. Date(Timespan) >> #to: will create a Timespan.
>>
>> Levente
>>
>> [1]
>> http://forum.world.st/Testing-out-new-UTCDateAndTime-in-Squeak-5-3-alpha-td5096623.html
>>
>> >
>> > -cbc
>> >
>> >
>>
>
>
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