On 30 Oct 2013, at 22:46, Nicolas Cellier <[email protected]> wrote:
> Why not a more discriminating example, like '19991231’? From the class comment: … You instanciate me by specifying the textual format by example, based on a #reference timetamp. Each component of the example representation is numbered from largest to smallest unit, 1=year, 2=month, 3=dayInMonth, 4=hour (16 in 24 hour format), 5=minute and 6=second, as in the ISO representation: 2001-02-03T16:05:06Z which is a Saterday. Example format strings can be found in my class accessing protocol or in the unit tests. … But of course, internally there is less magic: it are just specific keys/tokens that are recognised ;-) The example is kind of compiled though to make it more efficient should you reuse the format. > 2013/10/30 Sven Van Caekenberghe <[email protected]> > Hi Blake, > > On 30 Oct 2013, at 21:55, blake <[email protected]> wrote: > > > Heya, guys-- > > > > Converting a Ruby program to Pharo, and one of the things this program does > > is write a file out by date. The format is "yyyymmdd" (which is my > > preferred naming convention). In Ruby I have: > > > > "%04d" % d.year + "%02d" % d.month + "%02d" % d.day > > > > In Smalltalk, the closest I can seem to get to this is: > > > > d year asString, (d monthIndex asString padLeftTo: 2 with: $0), (d > > dayOfMonth asString padLeftTo: 2 with: $0) > > > > ...which seems sort verbose. Anyone have any more elegant solutions? > > Using the ‘by example’ formatter/parser that is part of the ZTimestamp > package (can be loaded using the Configuration Browser), you could say: > > (ZTimestampFormat fromString: '20010203') format: Date today. > > Although it is called ZTimestampFormat, it can actually work with Date, Time, > DateAndTime as well. > > Sven >
