- Pharo-dev - lists.pharo.org

Re: [Pharo-dev] How to create lines with Athens

by kilon alios

yes I am aware of the examples already, I am learning from them. Please note I have found a bug with Athens, which looks to me pretty major. If I save a morph using Athens and reload the image, I see the red box of doom. For example trying your example from stackoverflow. Are you aware of this bug ? On Thu, Oct 31, 2013 at 2:43 AM, Igor Stasenko <siguctua(a)gmail.com> wrote: > ah, yes , there's also examples in > Athens-Examples package. > > > On 31 October 2013 01:30, Igor Stasenko <siguctua(a)gmail.com> wrote: > >> >> On 30 October 2013 23:02, kilon alios <kilon.alios(a)gmail.com> wrote: >> >>> well I just asked if there is any kind of Documentation about Athens . >>> Or should I just read the code and ask questions ? >>> >>> >> the main source of documentation right now is class comments >> and tutorial. >> I've spent quite of a time commenting the central classes of athens, >> hope that's helpful. >> Of course this does not replacement for a well written docu, and that >> needs to be done. >> >> >>> >>> On Wed, Oct 30, 2013 at 11:51 PM, Igor Stasenko <siguctua(a)gmail.com>wrote: >>> >>>> i hope you satisfied with my answer. >>>> you welcome to ask more, if you not :) >>>> >>>> >>>> On 30 October 2013 22:32, dimitris chloupis <thekilon(a)yahoo.co.uk>wrote: >>>> >>>>> >>>>> http://stackoverflow.com/questions/19694197/how-to-create-lines-with-athens >>>>> >>>> >>>> >>>> >>>> -- >>>> Best regards, >>>> Igor Stasenko. >>>> >>> >>> >> >> >> -- >> Best regards, >> Igor Stasenko. >> > > > > -- > Best regards, > Igor Stasenko. >

Oct. 31, 2013

Re: [Pharo-dev] Formatting dates

by phil＠highoctane.be

Closest match is with the Printf package (http://www.squeaksource.com/Printf ) example: now := DateAndTime now. filename := '%s-%04d%02d%02d_%02d%02d.ston' printf: { self name. now year. now month. now dayOfMonth. now hour. now minutes.}. I am coming from C, so, yes, I like printf. (Can't help thinking about PRINT USING "#####.##" of old :-) http://www.colorcomputerarchive.com/coco/Documents/Manuals/Hardware/Getting… p187 - 1983) Phil On Wed, Oct 30, 2013 at 11:11 PM, Sven Van Caekenberghe <sven(a)stfx.eu>wrote: > > On 30 Oct 2013, at 22:46, Nicolas Cellier < > nicolas.cellier.aka.nice(a)gmail.com> wrote: > > > Why not a more discriminating example, like '19991231â? > > From the class comment: > > â¦ > 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. > â¦ > > 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 <sven(a)stfx.eu> > > Hi Blake, > > > > On 30 Oct 2013, at 21:55, blake <dsblakewatson(a)gmail.com> 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 âby exampleâ 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 > > > > >

Oct. 31, 2013

Re: [Pharo-dev] Losing instance variable addition

by Tudor Girba

I completely disagree with this point of view :). We should assume an open world, not a close one. From this point of view, any part of the system should be extensible by anyone. In most other languages I know, it is not even possible to extend easily a class with new functionality. In Pharo we can, and we know it is a powerful mechanism. It is not the responsibility of the base class to know what extensions are out there and protect against them. Just like with subclassing, It is in the responsibility of the extender. We should be able to do the same with state as well. Without this mechanism, we are forced to put in place clunky dictionary-based mechanism to support state extension. Essentially, any white-box framework does that. For example, Morphic does that, FAMIX and Roassal do that, too (and yes, this is not a bad thing). We need this mechanism in the environment, and if I understand Slots correctly, now we have first class support for it. This also means that overrides will be easier to deal with, too. Of course, overrides can induce headaches from time to time, but we should treat these headaches with proper tools, not by forbidding the world to extend. And if we are at it, we should also be able to extend a class with Traits, too. Cheers, Doru On Wed, Oct 30, 2013 at 10:54 PM, Camillo Bruni <camillobruni(a)gmail.com>wrote: > > On 2013-10-30, at 22:36, Igor Stasenko <siguctua(a)gmail.com> wrote: > > > I don't think there's something to fix. > > You cannot 'extend' classes belonging to other package in any other way > > than adding extension methods. > > Allowing extension of ivars or any other vars by foreign package > > is road to nowhere. > > > > I would not like if shape of my kernel classes depends on what packages > i load > > or in what order i loaded them. > > To me it is clear that if one needs to add/remove/modify instance > variables > > of some class, those changes should belong to the package containing > that class, > > not some random package. > > Exactly, it would cause the same problem as we have with overrides in > monticello > -- www.tudorgirba.com "Every thing has its own flow"

Oct. 31, 2013

Re: [Pharo-dev] Formatting dates

by David T. Lewis

On Wed, Oct 30, 2013 at 03:03:53PM -0700, blake wrote: > Chris, > > On Wed, Oct 30, 2013 at 2:02 PM, Chris Muller <asqueaker(a)gmail.com> wrote: > > > Date today yyyymmdd. "prints '2013-10-30'" > > > > > I don't want the separator. > Date today yyyymmdd copyWithoutAll: '-'

Oct. 31, 2013

Re: [Pharo-dev] How to create lines with Athens

by Igor Stasenko

ah, yes , there's also examples in Athens-Examples package. On 31 October 2013 01:30, Igor Stasenko <siguctua(a)gmail.com> wrote: > > On 30 October 2013 23:02, kilon alios <kilon.alios(a)gmail.com> wrote: > >> well I just asked if there is any kind of Documentation about Athens . Or >> should I just read the code and ask questions ? >> >> > the main source of documentation right now is class comments > and tutorial. > I've spent quite of a time commenting the central classes of athens, > hope that's helpful. > Of course this does not replacement for a well written docu, and that > needs to be done. > > >> >> On Wed, Oct 30, 2013 at 11:51 PM, Igor Stasenko <siguctua(a)gmail.com>wrote: >> >>> i hope you satisfied with my answer. >>> you welcome to ask more, if you not :) >>> >>> >>> On 30 October 2013 22:32, dimitris chloupis <thekilon(a)yahoo.co.uk>wrote: >>> >>>> >>>> http://stackoverflow.com/questions/19694197/how-to-create-lines-with-athens >>>> >>> >>> >>> >>> -- >>> Best regards, >>> Igor Stasenko. >>> >> >> > > > -- > Best regards, > Igor Stasenko. > -- Best regards, Igor Stasenko.

Oct. 31, 2013

Re: [Pharo-dev] How to create lines with Athens

by Igor Stasenko

On 30 October 2013 23:02, kilon alios <kilon.alios(a)gmail.com> wrote: > well I just asked if there is any kind of Documentation about Athens . Or > should I just read the code and ask questions ? > > the main source of documentation right now is class comments and tutorial. I've spent quite of a time commenting the central classes of athens, hope that's helpful. Of course this does not replacement for a well written docu, and that needs to be done. > > On Wed, Oct 30, 2013 at 11:51 PM, Igor Stasenko <siguctua(a)gmail.com>wrote: > >> i hope you satisfied with my answer. >> you welcome to ask more, if you not :) >> >> >> On 30 October 2013 22:32, dimitris chloupis <thekilon(a)yahoo.co.uk> wrote: >> >>> >>> http://stackoverflow.com/questions/19694197/how-to-create-lines-with-athens >>> >> >> >> >> -- >> Best regards, >> Igor Stasenko. >> > > -- Best regards, Igor Stasenko.

Oct. 31, 2013

Re: [Pharo-dev] Formatting dates

by blake

>>Date today printFormat: #(3 2 1 0 1 1 2) Wait, that's what I was trying for, initially (although it's not super-clear). I did not get that I could use 0 (or apparently a bunch of other characters) as a separator. I didn't see this code at the bottom of printOn:format: (formatArray at: 4) ~= 0

Oct. 30, 2013

Re: [Pharo-dev] Formatting dates

by Sven Van Caekenberghe

On 30 Oct 2013, at 22:46, Nicolas Cellier <nicolas.cellier.aka.nice(a)gmail.com> wrote: > Why not a more discriminating example, like '19991231â? >From the class comment: â¦ 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. â¦ 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 <sven(a)stfx.eu> > Hi Blake, > > On 30 Oct 2013, at 21:55, blake <dsblakewatson(a)gmail.com> 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 âby exampleâ 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 >

Oct. 30, 2013

Re: [Pharo-dev] Formatting dates

by blake

Good to know, thanks. That looks cool. On Wed, Oct 30, 2013 at 2:39 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > Hi Blake, > > On 30 Oct 2013, at 21:55, blake <dsblakewatson(a)gmail.com> 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 âby exampleâ 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 >

Oct. 30, 2013

Re: [Pharo-dev] Formatting dates

by blake

>>Why not "%04d%02d%02d" % [d.year, d.month, d.day] ? Probably because I'm not super-comfortable with all of Ruby's many, many, many features. >>Chris has already given a near solution. You just need to "select: #isDigit" on the end of his answer to get exactly what you want.<< I figured there was a good way to use "select:" but couldn't think of it, thanks. Date today yyyymmdd select: #isDigit is not bad, though I'd think you should be able to set the separator somehow (or remove it, as in my case).

Oct. 30, 2013