Beginners February 2009

beginners@lists.squeakfoundation.org

40 participants
33 discussions

Number formatting printf/sprintf for Squeak?
by Sorensen 25 Feb '09

25 Feb '09

Is there a printf/sprintf-like package for formatting text for Squeak? If not, how do Squeakers go about formatting currency amounts or left justifying text within a field? -- View this message in context: http://www.nabble.com/Number-formatting-printf-sprintf-for-Squeak--tp220458… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Why do lengthy installations "shut down" Squeak?
by Rob Rothwell 24 Feb '09

24 Feb '09

Just wondering why, since Squeak has processes, when install something large via the Universe Browser, etc... I can't do anything else in Squeak while it is installing? Is this by design? It seems like it could just be a low priority background task and you could keep working... Rob

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Preference Browser ...
by GeertC 24 Feb '09

24 Feb '09

As most people here I consider myself to be still new to Smalltalk. I have now read most recommended reading material and now I would like to look and learn from existing code. I would like to find out how the Preference Browser works and would appreciate if someone could point me to a brief overview of its design? -- View this message in context: http://www.nabble.com/Preference-Browser-...-tp22171484p22171484.html Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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[Fwd: Magma seasideHelper and remote magma server]
by Miguel Enrique Cobá Martínez 24 Feb '09

24 Feb '09

Sorry for double posting but the list for magma hasn't been very active in the last months. Maybe someone here knows the answer. Thank you very much, Miguel Cobá

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Re:Problem encountered when reading help files
by Jerome Peace 23 Feb '09

23 Feb '09

[Newbies] Problem encountered when reading help files Hi Jerry, You have found a bug. One way or another. The best thing to do is to plant a report on mantis. Then to increase attention, write the mailing list and refer to the mantis report. Yours in curiosity and service, --Jerome Peace Here are the faq's FAQ: Is this a known issue ? Where is the place to report bugs (or check if some have already been raised) ? The best place for this info would be to start a Mantis report. (You can get a mantis acct freely and easily). A good place to start is: http://bugs.squeak.org/my_view_page.php Mantis provides a patient persistent way to focus on an issue. I use it to accumulate data on a problem until a solution can be found. It provides a place to alert the community to a problem; -accumulate facts and clues from the analysis; -publish preposed solutions and get feedback; -get solutions harvested and included into the main stream. This FAQ is available at the Squeak wiki site. http://wiki.squeak.org/squeak/Mantis%20FAQ%20and%20Tips aka: http://wiki.squeak.org/squeak/5912 Mantis FAQ and Tips *** >Jerry Henderson jerry.henderson at verizon.net >Thu Feb 19 06:30:37 UTC 2009 > > >SequenceableCollection>>last answers the last element of the receiver, >and is implemented as: > ^ self at: self size. > >It is an index error, when size is 0. > >I assume this is a design choice, rather than a bug; but I'm too new to >know. Anyway, in 3.10.2, when I tried the menu path >"World::Help::Preferences::Help!", it threw the exception, apparently >because of an empty aHelpString. So I guess either >Preferences>>giveHelpWithPreferences should be checking for empty >stings, or the source data (the help strings) are improperly formatted. >I didn't know what else to do with my new found knowledge, so here I am. > >-- >Jerry > ***

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SQLite3 'Unable to find function address'
by aditya siram 21 Feb '09

21 Feb '09

Hi all, I am not sure if this is the place to ask, but I have installed FFI and the Sqlite3 package, but am unable to use it. I have a database file 'test.db' in the 'Smalltalk imagePath' location, but the following interaction from a workspace fails. ======================== db := SQLiteConnection fileNamed:'test.db'. db open. ======================== I get an 'Unable to find function address' error. I have included a screenshot. If this isn't the right forum please point me in the right direction. Thanks ... Deech

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ProportionalLayout
by Bert Freudenberg 20 Feb '09

20 Feb '09

Hi, on IRC we discussed Morphic layouts tonight and I thought I'd post an example here. For many simple tasks ProportionalLayout works fine. In it, for each edge of a morph you specify a fraction of the container's extent as "anchor", plus an offset in pixels. The position of an edge is then simply determined by fraction * extent + offset So fraction=0 offset=10 means 10 pixels inwards from the left or top edge (as in the green and yellow morphs below), while fraction=1 offset=-10 means 10 pixels inward from the right or bottom edge (cyan and blue morphs). Fraction=0.5 is the center, and you can add an offset of course (right edge of magenta and left edge of cyan). Select this in a workspace, do-it, and resize the resulting morph. Then change one number, select and do-it again, and compare both. =========================== bigMorph := Morph new color: Color red; extent: 200@200; layoutPolicy: ProportionalLayout new. greenMorph := Morph new color: Color green. bigMorph addMorph: greenMorph fullFrame: (LayoutFrame fractions: (Rectangle left: 0 right: 1 top: 0 bottom: 0) offsets: (Rectangle left: 10 right: -10 top: 10 bottom: 30)). yellowMorph := Morph new color: Color yellow. bigMorph addMorph: yellowMorph fullFrame: (LayoutFrame fractions: (Rectangle left: 0 right: 0 top: 0 bottom: 1) offsets: (Rectangle left: 10 right: 50 top: 40 bottom: -40)). cyanMorph := Morph new color: Color cyan. bigMorph addMorph: cyanMorph fullFrame: (LayoutFrame fractions: (Rectangle left: 0.5 right: 1 top: 0 bottom: 1) offsets: (Rectangle left: 5 right: -10 top: 40 bottom: -40)). magentaMorph := Morph new color: Color magenta. bigMorph addMorph: magentaMorph fullFrame: (LayoutFrame fractions: (Rectangle left: 0 right: 0.5 top: 0 bottom: 1) offsets: (Rectangle left: 60 right: -5 top: 40 bottom: -40)). blueMorph := Morph new. bigMorph addMorph: blueMorph fullFrame: (LayoutFrame fractions: (Rectangle left: 0 right: 1 top: 1 bottom: 1) offsets: (Rectangle left: 10 right: -10 top: -30 bottom: -10)). bigMorph openInHand =========================== It"s much easier to see what happens using #left:right:top:bottom: to make the layout frames than if you write it in the more common #corner: notation (a mistake I made on IRC today). HTH, - Bert -

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Squeak Leadership elections
by Göran Krampe 19 Feb '09

19 Feb '09

Hi! (Sorry for the list-cross-post) In the first week of March the annual elections for the Squeak Leadership team will be held at squeak.org. The current list of candidates (as well as other info) is here: http://wiki.squeak.org/squeak/6116 Nominations are possible till this Friday, 22nd february. If you would like to vote but did not take part last year, follow the procedure under "Voter list" at the link above to get a ballot. regards, Göran Krampe - Election team leader

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Problem encountered when reading help files
by Jerry Henderson 19 Feb '09

19 Feb '09

Hi, SequenceableCollection>>last answers the last element of the receiver, and is implemented as: ^ self at: self size. It is an index error, when size is 0. I assume this is a design choice, rather than a bug; but I'm too new to know. Anyway, in 3.10.2, when I tried the menu path "World::Help::Preferences::Help!", it threw the exception, apparently because of an empty aHelpString. So I guess either Preferences>>giveHelpWithPreferences should be checking for empty stings, or the source data (the help strings) are improperly formatted. I didn't know what else to do with my new found knowledge, so here I am. -- Jerry

1 0

Re: [Newbies] ScaledDecimal implementation (was: Number formatting printf/sprintf for Squeak?)
by Michael van der Gulik 19 Feb '09

19 Feb '09

On Thu, Feb 19, 2009 at 8:28 AM, Chris Cunningham <cunningham.cb(a)gmail.com>wrote: > I'd be leary of basing Currency off of ScaledDecimal, especially if there > is to be much manipulation of it (such as multiplication or division). The > reason is that ScaledDecimal keeps the representation of their numbers as > fractions under the covers - which can results in some odd (and incorrect) > results. > > Could you give me an example? It isn't immediately intuitive to me what incorrect results might occur. Rounding errors maybe? Gulik -- http://gulik.pbwiki.com/

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Beginners February 2009