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Re: [Pharo-users] Metacello does not load the expected version from ConfigOf

by Dale Henrichs

Usman, Well I don't have an official bugfix yet, but if you filein the attached method and run the following, PetitParser will downgrade and get loaded correctly (at least it worked for me)...The fist two statements are intended to replace GTMetacelloPlatform with MetacelloPharo30Platform and initialize the registry correctly ... not sure what impact on Moose these changes will have) : MetacelloPharo30Platform initialize. [ MetacelloProjectRegistration resetRegistry; primeRegistryFromImage ] on: Warning do: [ :ex | Transcript cr; show: 'Warning resumed: ' , ex description. ex resume ]. Metacello new configuration: 'DummyParser'; version: '1.0'; repository: '???'; onDowngrade: [:ex :existing :new | existing projectName = 'PetitParser' ifTrue: [ new projectSpec operator: #=. ex allow ] ifFalse: [ ex disallow ] ] ; load. The new method will be part of the next Metacello release and has been tested[1], but I may take a slightly different approach with the official bugfix. Setting the operator achieves the desired result, but is not quite how I would like to address the issue. HTH, Dale [1] https://travis-ci.org/dalehenrich/metacello-work/builds/46640819 On 1/8/15 12:32 AM, Usman Bhatti wrote: > > > On Wed, Jan 7, 2015 at 8:25 PM, Dale Henrichs > <dale.henrichs(a)gemtalksystems.com > <mailto:dale.henrichs@gemtalksystems.com>> wrote: > > Usman, > > No, I appreciate your patience:) If creating your own > configuration works for you then that is a good route to go... > > > Sharing your image will make it much easier for me to get the > bottom of this (on my own schedule:), so please send me a link for > accessing your image and I'll dig into this in more detail when I > have time ... > > > Here is the image. > https://dl.dropboxusercontent.com/u/11804892/downgrade-with-metacello.zip > > You just need to execute the script in the workspace/playground to > reproduce the problem (i.e. launching the directive to load PP 1.51 > and that not happening). > > > If you find yourself stuck and needing the `downgrade directive` > again, I'll bump up the priority ... > > > I can still wait till next week. If you could have a look by then, > it'll be great. > tx. > Usman > > > > Dale > > > On 01/07/2015 09:19 AM, Usman Bhatti wrote: >> >> >> On Tue, Jan 6, 2015 at 6:56 PM, Dale Henrichs >> <dale.henrichs(a)gemtalksystems.com >> <mailto:dale.henrichs@gemtalksystems.com>> wrote: >> >> >> On 1/6/15 7:16 AM, Usman Bhatti wrote: >>> Dale, >>> >>> I couldn't make it work with the upgraded Metacello and the >>> script you provided. >>> >>> Steps I did: >>> >>> 1. Download moose image: >>> https://ci.inria.fr/moose/job/moose-5.0/ >>> >>> 2. Update my Metacello to the 'full' version: >>> Metacello new >>> baseline: 'Metacello'; >>> repository: >>> 'github://dalehenrich/metacello-work:master/repository'; >>> get. >>> Metacello new >>> baseline: 'Metacello'; >>> repository: >>> 'github://dalehenrich/metacello-work:master/repository'; >>> onConflict: [:ex | ex allow]; >>> load >>> >>> 3. File in the ConfigurationOfDummyParser (see the first >>> message in the thread). >>> >>> 4. Run this script to downgrade to PetitParser version 1.51 >>> >>> Metacello new >>> configuration: 'DummyParser'; >>> version: '1.0'; >>> repository: '???'; >>> onDowngradeUseIncoming: #('PetitParser'); >>> load. >>> >>> The desired version is still not loaded, am I missing >>> something here? >> Good question, I don't have a lot of time today to spend time >> trying to reproduce your problem, but if you send me a copy >> of the Transcript produced while doing the load I might be >> able to spot the problem ... >> >> >> It looks to me that the downgrade command is not working. >> Whenever I point to the version preceding the one loaded, the >> packages are not fetched. >> >> I am attaching here two files. >> >> The first (Transcript-PP151) is the output of the transcript as >> you asked. You can see that PetitParser packages as defined by >> the version 1.51 are not fetched. All that is loaded is Glamour >> because the version 1.51 of PetitParser loads the latest packages >> of Glamour. The load works because it is an upgrade from the >> current version of Glamour which is a stable. >> >> When I saw that only Glamour packages are loaded, I thought of >> testing Glamour downgrade too to see if the problem is specific >> to PetitParser. You can see the result in the second file >> (Transcript-downgrade-glamour). No packages of Glamour are >> fetched because the configuration tries to downgrade it (stable >> is more recent than 3.0.0 which I try to load). >> >> In my opinion, downgrade is not working as required. If you want >> I can share my image thru dropbox so that you can have a look to >> see what might be wrong. >> >> >>> >>> regards, >>> >>> A question: I always use Metacello with ConfigOf and have >>> never used the scripting API myself or saw it being used >>> elsewhere. >>> Can you provide a link that describes the use cases for >>> both: ConfigOf vs. Scripting API? >> I've noticed the same thing:) >> >> My "elevator pitch" for the script api goes like this: >> 1. The scripting api maintains a registry of the actual >> project versions loaded into the image, >> making #currentVersion obsolete. #currentVersion is bad >> because it does a calculation of >> the current version that can be very slow and sometimes >> completely incorrect. >> 2. The old api has rules that it follows when loading >> projects (i.e., newer projects always win) and >> there is no mechanism for altering those rules. The >> scripting api provides mechanisms for >> for bending those rules to fit your needs ... like >> allowing a downgrade of a project. >> >> Part of the reason that people haven't changed has to do with >> how incredibly difficult it is to change the existing >> inertia. Another part of it is that I continue to support the >> old way of doing things, so there is no explicit motivation >> to change. >> >> If you look back 2-3 years in the archives of the Metacello >> mailing list[1] you should be able to find a number of posts >> where I make a more detailed cases for the scripting api:) >> >> At the end of the day, it isn't important to me to "get >> people to use the scripting api," as I said, I continue to >> support using the old api. I figure that when enough people >> start asking questions about how to "bend the Metacello >> rules" that folks will begin to use the "new" scripting api:) >> >> >> So, what I learn is that I am trying to bend the rules of >> Metacello which is a rare use case :). I am thinking of avoiding >> this downgrading altogether by forking to create my own ConfigOf >> that loads the correct versions. Downgrading might be an >> anti-pattern. >> >> Thank you for your patient so far :) >> >> regards. >> >> >> Dale >> [1] https://groups.google.com/forum/#!forum/metacello >> <https://groups.google.com/forum/#%21forum/metacello> >> >> > >

Jan. 11, 2015

Re: [Pharo-users] if Pharo is key for you

by kilon alios

Good thread I would love also to hear what other Pharoers work behind the scenes My own project is Ephestos a visual coding enviroment for Blender . I have made some good progress in 2014 and I am sure 2015 will bring more features. Ephestos will benefit the Pharo community by 1) Offering full access to the most powerful open source and free application for creating of 3d art , Blender. 2) Allow Pharo full access to Cpython libraries one of the most popular and powerful language out there and also allow python code to mix with pharo , see python code as pharo code etc. Both goals have been achieved partly and I hope to bring my project closer to them each year. https://www.youtube.com/watch?v=XPGDQc5LUvE I am also interested as secondary goals to 3) bring more visual coding tools to pharo 4) integrate tablets and smartphones (android and ios) with pharo as external controllers and as replacements to both mouse and keyboard. On Sun, Jan 11, 2015 at 6:21 PM, Offray Vladimir Luna CÃ¡rdenas < offray(a)riseup.net> wrote: > Hi all, > > Just picking up some old threads, so I answer this below. > > El 18/09/13 a las 01:19, StÃ©phane Ducasse escribiÃ³: > >> Hi guys >> >> if Pharo is key for you then you should ask yourself what you did for >> Pharo recently. >> Writing code, writing documentation helping closing bug entries, >> participating to the association, to the consortium... >> >> Pharo is not happening from spontaneous generation. >> >> Stef >> >> > Well I recently (previous semester) start to: > > 1. Learn Pharo. > 2. Develop my own app to learn and write about the process [a][b]. I will > be payed for this prototype and will be a paying member of the association. > 3. Made my local group of Pharo/Smalltalk on Data narratives and > visualization for Open/Garage/Citizen Science & Research at our local > hackerspace with several (3 or 4) meetings that will continue this year [c]. > 4. Read a lot of previous email to be aware the community memory and > revive older threads when is possible and trying to be a more > proactive/visible member of this community, even in my newbie condition. > > So, what I'm planing for this year: > > 1. To learn/teach more about Pharo specially moldable tools, fluid > interfaces and good devel practices. > 1. To have a good application with some data narratives and visualization > build on it. A good download page, documentation and with clean code > instead of the rookie one I have now. > 2. To create a stronger local community around data > visualization/narratives for Open/Garage/Citizen Sciecen & Research powered > by Pharo. > 3. To write more. > 4. Economical contributions to the community through the association. > 5. Hopefully make stronger ties to the international community in South > America or Europe by participating in some event or scholarship (this will > depend on costs). > > Thanks for the questions and I will be glad to read other > answers/prospective about persons and Pharo, > > Cheers, > > Offray > > Links: > ====== > > [a] http://mutabit.com/deltas/repos.fossil/grafoscopio/doc/ > tip/Docs/Es/Articulos/Libertadores/bootstrapping-objeto-investigacion.pdf > > [b] http://smalltalkhub.com/#!/~Offray/Grafoscopio/ > > [c] http://hackbo.co/ > > > >

Jan. 11, 2015

Re: [Pharo-users] if Pharo is key for you

by Offray Vladimir Luna CÃ¡rdenas

Hi all, Just picking up some old threads, so I answer this below. El 18/09/13 a las 01:19, StÃ©phane Ducasse escribiÃ³: > Hi guys > > if Pharo is key for you then you should ask yourself what you did for Pharo recently. > Writing code, writing documentation helping closing bug entries, participating to the association, to the consortium... > > Pharo is not happening from spontaneous generation. > > Stef > Well I recently (previous semester) start to: 1. Learn Pharo. 2. Develop my own app to learn and write about the process [a][b]. I will be payed for this prototype and will be a paying member of the association. 3. Made my local group of Pharo/Smalltalk on Data narratives and visualization for Open/Garage/Citizen Science & Research at our local hackerspace with several (3 or 4) meetings that will continue this year [c]. 4. Read a lot of previous email to be aware the community memory and revive older threads when is possible and trying to be a more proactive/visible member of this community, even in my newbie condition. So, what I'm planing for this year: 1. To learn/teach more about Pharo specially moldable tools, fluid interfaces and good devel practices. 1. To have a good application with some data narratives and visualization build on it. A good download page, documentation and with clean code instead of the rookie one I have now. 2. To create a stronger local community around data visualization/narratives for Open/Garage/Citizen Sciecen & Research powered by Pharo. 3. To write more. 4. Economical contributions to the community through the association. 5. Hopefully make stronger ties to the international community in South America or Europe by participating in some event or scholarship (this will depend on costs). Thanks for the questions and I will be glad to read other answers/prospective about persons and Pharo, Cheers, Offray Links: ====== [a] http://mutabit.com/deltas/repos.fossil/grafoscopio/doc/tip/Docs/Es/Articulo… [b] http://smalltalkhub.com/#!/~Offray/Grafoscopio/ [c] http://hackbo.co/

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by Hilaire

Very interesting reading. The formula in figure 1 is wrong as it is "composed" interest, and power should be used. rate := 10 % / 1 year terms := 6 months 100$ * (1 + rate) ^ terms So I wonder how the simplification as exposed in Fig. 4 goes in that case (rate should be transformed to 10/1200) and would be really interested if the model can fit the real situation: how the model can deduce rate per year should be adapted to rate per month without a prior knowledge of the formula meaning. In Smalltalkhub I see two Acomcagua packages, which one to use? Hilaire Le 11/01/2015 12:22, stepharo a Ã©crit : > Hilaire > > you have also acancagua that support unit and conversion and aconcagua > came out of a project dealing > with money and trades. > > http://sdmeta.gforge.inria.fr/Teaching/CoursAnnecy/0506-M1-COO/ > read the two articles in there. > > Stef -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Jan. 11, 2015

Re: [Pharo-users] Problem due to deprecation of class Url in Pharo 3 and Moose 5.0

by PBKResearch

Sven Apologies for the delay in replying. Basically, the relative argument can be anything that occurs in a LINK tag in an HTML document. This can be anything from a file name to a complete address with only the 'http:' missing. I have found a couple of examples in a document from the Wikipedia 'Wiktionary', where I show in the attached workspace file the absolute address, the two relative addresses and the effect of combining using Url class>>#combine:withRelative and ZnUrl>>#inContextOf:. In each case the output of the Url class>>#combine:withRelative is the expected result; in the first case ZnUrl>>#inContextOf: gives the expected result, in the second it does not. The relative address in the second case seems a bit odd (why not include the 'http:' and make it absolute?), but it actually occurs (quite often in Wiktionary files at least) and the code needs to be able to deal with it. Hope this helps. Peter Kenny -----Original Message----- From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of Sven Van Caekenberghe Sent: 10 January 2015 22:56 To: Any question about pharo is welcome Subject: Re: [Pharo-users] Problem due to deprecation of class Url in Pharo 3 and Moose 5.0 Peter, > On 10 Jan 2015, at 23:30, PBKResearch <peter(a)pbkresearch.co.uk> wrote: > >> Yes change the code of the Parser not to use old code. > As I pointed out, the Parser is a large and complex package, and I am > not the author, so this is easier said than done. It seems a bit odd > to dismiss code which worked OK in Moose 4.9, but not in Moose 5.0, as > 'old code.' It is code which has no functional equivalent in the new > code, as Sven has confirmed. Could you explain what arguments were given to the combine and what the expected output was/should be ? How does it use path merging ? Thx, Sven

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by stepharo

Hilaire you have also acancagua that support unit and conversion and aconcagua came out of a project dealing with money and trades. http://sdmeta.gforge.inria.fr/Teaching/CoursAnnecy/0506-M1-COO/ read the two articles in there. Stef Le 11/1/15 11:22, Hilaire a Ã©crit : > Joachim, > > Thanks for the tips. > I saw the Unit package was following the same pattern you are describing. > My first though was to use ScaledDecimal, but I discovered it is pretty > slow with computation (amortization schedule, search for rate) but there > are workarounds for that. > > Hilaire > > Le 11/01/2015 10:36, Joachim Tuchel a Ã©crit : >> There are more arguments against Subclassing any Number class: >> >> Exchange rates are two-way most of the times. It is not only USD->EUR, >> but also the other way round. This is not the responsibilty of a number. >> >> For more information, I recommend Martin Fowler's Analysis Patterns book >> (old, but not dated at all!). >> >> Joachim >> >> >> Am 11.01.15 um 10:31 schrieb Joachim Tuchel: >>> Ah, I just saw on second reading that you want to implement something >>> for currency exchange rates, not MonetaryAmounts. Still, don't use >>> Float, use ScaledDecimal or FixedPoint and make sure it NEVER contains >>> a Float. You'll get into all kinds of strange problems, starting with >>> Imports from datasources like Yahoo or whatever. >>> >>> I'd subclass Object, and make the new class hold the exchange rates as >>> a ScaledDecimal with a well-defined scale (like 4 or 6 or even 8 >>> digits if you want). >>> >>> Joachim >>> >>> >>> >>> >>> Am 11.01.15 um 10:28 schrieb Joachim Tuchel: >>>> Hilaire, >>>> >>>> unless you have very (very very) specific needs, I would strongly >>>> discourage you to use Float for anything related to Money or >>>> Percentages. >>>> >>>> We use a subclass of Object for MonetaryAmounts and implemented most >>>> of the protocol of Magnitude. But, most importantly, the amount >>>> instVar is made sure to always hold instances of ScaledDecimal (in VA >>>> Smalltalk, that is). >>>> >>>> Joachim >>>> >>>> Am 11.01.15 um 10:25 schrieb Hilaire: >>>>> Le 11/01/2015 09:06, stepharo a Ã©crit : >>>>>> Hilaire >>>>>> >>>>>> what is your requirement? >>>>>> >>>>>> Stef >>>>> I want to create a currency object, basically a Float with an attribute >>>>> to specify the currency unit. >>>>> >>>>> Hilaire >>>>> >>>>> >>>> >>>> >>> >>> >> >> >

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by Hilaire

Joachim, Thanks for the tips. I saw the Unit package was following the same pattern you are describing. My first though was to use ScaledDecimal, but I discovered it is pretty slow with computation (amortization schedule, search for rate) but there are workarounds for that. Hilaire Le 11/01/2015 10:36, Joachim Tuchel a Ã©crit : > There are more arguments against Subclassing any Number class: > > Exchange rates are two-way most of the times. It is not only USD->EUR, > but also the other way round. This is not the responsibilty of a number. > > For more information, I recommend Martin Fowler's Analysis Patterns book > (old, but not dated at all!). > > Joachim > > > Am 11.01.15 um 10:31 schrieb Joachim Tuchel: >> Ah, I just saw on second reading that you want to implement something >> for currency exchange rates, not MonetaryAmounts. Still, don't use >> Float, use ScaledDecimal or FixedPoint and make sure it NEVER contains >> a Float. You'll get into all kinds of strange problems, starting with >> Imports from datasources like Yahoo or whatever. >> >> I'd subclass Object, and make the new class hold the exchange rates as >> a ScaledDecimal with a well-defined scale (like 4 or 6 or even 8 >> digits if you want). >> >> Joachim >> >> >> >> >> Am 11.01.15 um 10:28 schrieb Joachim Tuchel: >>> Hilaire, >>> >>> unless you have very (very very) specific needs, I would strongly >>> discourage you to use Float for anything related to Money or >>> Percentages. >>> >>> We use a subclass of Object for MonetaryAmounts and implemented most >>> of the protocol of Magnitude. But, most importantly, the amount >>> instVar is made sure to always hold instances of ScaledDecimal (in VA >>> Smalltalk, that is). >>> >>> Joachim >>> >>> Am 11.01.15 um 10:25 schrieb Hilaire: >>>> Le 11/01/2015 09:06, stepharo a Ã©crit : >>>>> Hilaire >>>>> >>>>> what is your requirement? >>>>> >>>>> Stef >>>> >>>> I want to create a currency object, basically a Float with an attribute >>>> to specify the currency unit. >>>> >>>> Hilaire >>>> >>>> >>> >>> >>> >> >> >> > > > -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by Joachim Tuchel

There are more arguments against Subclassing any Number class: Exchange rates are two-way most of the times. It is not only USD->EUR, but also the other way round. This is not the responsibilty of a number. For more information, I recommend Martin Fowler's Analysis Patterns book (old, but not dated at all!). Joachim Am 11.01.15 um 10:31 schrieb Joachim Tuchel: > Ah, I just saw on second reading that you want to implement something > for currency exchange rates, not MonetaryAmounts. Still, don't use > Float, use ScaledDecimal or FixedPoint and make sure it NEVER contains > a Float. You'll get into all kinds of strange problems, starting with > Imports from datasources like Yahoo or whatever. > > I'd subclass Object, and make the new class hold the exchange rates as > a ScaledDecimal with a well-defined scale (like 4 or 6 or even 8 > digits if you want). > > Joachim > > > > > Am 11.01.15 um 10:28 schrieb Joachim Tuchel: >> Hilaire, >> >> unless you have very (very very) specific needs, I would strongly >> discourage you to use Float for anything related to Money or >> Percentages. >> >> We use a subclass of Object for MonetaryAmounts and implemented most >> of the protocol of Magnitude. But, most importantly, the amount >> instVar is made sure to always hold instances of ScaledDecimal (in VA >> Smalltalk, that is). >> >> Joachim >> >> Am 11.01.15 um 10:25 schrieb Hilaire: >>> Le 11/01/2015 09:06, stepharo a Ã©crit : >>>> Hilaire >>>> >>>> what is your requirement? >>>> >>>> Stef >>> >>> I want to create a currency object, basically a Float with an attribute >>> to specify the currency unit. >>> >>> Hilaire >>> >>> >> >> >> > > >

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by Joachim Tuchel

Ah, I just saw on second reading that you want to implement something for currency exchange rates, not MonetaryAmounts. Still, don't use Float, use ScaledDecimal or FixedPoint and make sure it NEVER contains a Float. You'll get into all kinds of strange problems, starting with Imports from datasources like Yahoo or whatever. I'd subclass Object, and make the new class hold the exchange rates as a ScaledDecimal with a well-defined scale (like 4 or 6 or even 8 digits if you want). Joachim Am 11.01.15 um 10:28 schrieb Joachim Tuchel: > Hilaire, > > unless you have very (very very) specific needs, I would strongly > discourage you to use Float for anything related to Money or Percentages. > > We use a subclass of Object for MonetaryAmounts and implemented most > of the protocol of Magnitude. But, most importantly, the amount > instVar is made sure to always hold instances of ScaledDecimal (in VA > Smalltalk, that is). > > Joachim > > Am 11.01.15 um 10:25 schrieb Hilaire: >> Le 11/01/2015 09:06, stepharo a Ã©crit : >>> Hilaire >>> >>> what is your requirement? >>> >>> Stef >> >> I want to create a currency object, basically a Float with an attribute >> to specify the currency unit. >> >> Hilaire >> >> > > >

Jan. 11, 2015

Re: [Pharo-users] How to subclass Float class

by Joachim Tuchel

Hilaire, unless you have very (very very) specific needs, I would strongly discourage you to use Float for anything related to Money or Percentages. We use a subclass of Object for MonetaryAmounts and implemented most of the protocol of Magnitude. But, most importantly, the amount instVar is made sure to always hold instances of ScaledDecimal (in VA Smalltalk, that is). Joachim Am 11.01.15 um 10:25 schrieb Hilaire: > Le 11/01/2015 09:06, stepharo a Ã©crit : >> Hilaire >> >> what is your requirement? >> >> Stef > > I want to create a currency object, basically a Float with an attribute > to specify the currency unit. > > Hilaire > >

Jan. 11, 2015