October 2014 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Spur images

by Benjamin Pollack

On Sun, 05 Oct 2014 10:36:31 -0400, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > How come you got WideStrings ? > What does the input look like, can you give a partial example ? I'm guessing I got WideStrings because the file is indeed in UTF-8, with lots of characters outside the lower 128 code points. A sample couple of lines might look like åç°åº·å¸,The National,Sarah McLachlan,å¨æ°å«,Indochine,Rise Against,City and Colour,CÃ¦cilie Norby,El Cumbanchero,Death Letter The Beatles,The Who,Barenaked Ladies,The Doors,Bob Dylan These are two play lists, one per line; each comma-delimited element is a band on that play list. The full line for reading and tokenization is just "pathToFile asFileReference contents lines collect: [ :line | (',' split: line) collect: [ :ea | ea trimmed ]]." Based on the profile indicating that a lot of time is lost on things like WideString>>copyFrom:to:, I wasn't optimistic about trying to stream the contents instead of just calling "contents lines", but I admit I didn't try. --Benjamin

Oct. 5, 2014

Re: [Pharo-users] Spur images

by Sven Van Caekenberghe

How come you got WideStrings ? What does the input look like, can you give a partial example ? On 05 Oct 2014, at 16:03, Benjamin Pollack <benjamin(a)bitquabit.com> wrote: > On Fri, 03 Oct 2014 16:13:35 -0400, stepharo <stepharo(a)free.fr> wrote: >>> Looking at MessageTally, it seems at least half of that 278ms is spent >>> noodling around in WideStrings and other small things that the Spur >>> object format ought to help with, so it'd be interesting to see how much >>> of a speed boost that gives without any further work. >> tell us more about your algo because we want to know. > > It's not that exciting (it's a problem we give job applicants as a take-home coding test), but I'll describe it, since it highlights a common corner where Pharo does not perform terribly well. > > Basically, we give you a pile of play lists (a text file where each line is "Song1,Song2,Song3" and so on, representing a single play list), and then ask you to tell us which songs appear frequently together (where "frequently" is something we define--say, at least 100 times, for example). While there are interesting complex algorithms, a simple one that works well for small datasets is simply to walk all of play lists and build up a hashtable that maps pairs of bands to a count, then walk the hashtable and print out any keys whose counts are over the threshold. If this sounds like "dump all the permutations of each play list into a Bag and then walk Bag>>valuesAndCounts," you're right. As I said, it's not that complex. > > Python does very well on this because it hits on three things--hashtables, sets, and string processing--for which Python has obscenely good implementations in carefully optimized C. (In fact, the 80ms time I quoted you is surprisingly close to the maximum speed you can get with genuine C or C++ implementation on the sample dataset as well.) > > Pharo struggles to match Python for the same three reasons, but *especially* because its String functions are just much slower. In fact, if you implement the algorithm I described above naÃ¯vely in Pharo, the execution time is about 780ms--nearly ten times slower. After some reflection, I chopped the time to 270ms by converting all the band names to integers as the first step of the process (ArtistLister>>generateMap: in the profile trace below). Not only does this avoid WideString>>hash and friends; it also allows me to bring in IdentityDictionary and IdentitySet in most locations due to Pharo's object format. > > But there's a lot left. I'm attaching the profile output below. Notice that Pharo spends more time reading and processing the file (about 120ms) than the Python program spends executing total. > > --Benjamin > > > - 279 tallies, 279 msec. > > **Tree** > -------------------------------- > Process: (40s) Morphic UI Process: nil > -------------------------------- > 69.2% {193ms} ArtistLister>>groupsIn: > |18.6% {52ms} FileReference(AbstractFileReference)>>contents > | |17.6% {49ms} MultiByteFileStream(FileStream)>>contents > | | 17.6% {49ms} MultiByteFileStream>>next: > | | 5.0% {14ms} ByteString>>at:put: > | | |5.0% {14ms} WideString class>>from: > | | 5.0% {14ms} WideString>>at:put: > | | 5.0% {14ms} primitives > | | 1.4% {4ms} MultiByteFileStream>>next > | | 1.4% {4ms} UTF8TextConverter>>nextFromStream: > |14.7% {41ms} WideString(String)>>lines > | |14.7% {41ms} WideString(String)>>linesDo: > | | 10.0% {28ms} WideString>>copyFrom:to: > | | |5.4% {15ms} WideString(String)>>isOctetString > | | | |3.2% {9ms} WideString>>at: > | | | | |2.2% {6ms} Character class>>value: > | | | |2.2% {6ms} primitives > | | |4.7% {13ms} WideString(String)>>asOctetString > | | | 3.6% {10ms} primitives > | | 4.7% {13ms} WideString(String)>>lineIndicesDo: > | | 4.7% {13ms} WideString(String)>>indexOf:startingAt: > | | 4.7% {13ms} WideString class(String class)>>indexOfAscii:inString:startingAt: > |10.8% {30ms} ByteString(Object)>>split: > | |10.0% {28ms} ByteString(Object)>>split:do: > | | 5.7% {16ms} WideString>>copyFrom:to: > | | |3.2% {9ms} WideString(String)>>asOctetString > | | |2.5% {7ms} WideString(String)>>isOctetString > | | | 1.8% {5ms} primitives > | | 4.3% {12ms} ByteString(SequenceableCollection)>>split:indicesDo: > | | 2.9% {8ms} WideString(SequenceableCollection)>>indexOfSubCollection:startingAt: > | | |2.9% {8ms} WideString(String)>>indexOfSubCollection:startingAt:ifAbsent: > | | | 2.9% {8ms} WideString(String)>>findString:startingAt: > | | | 2.9% {8ms} WideString(String)>>findString:startingAt:caseSensitive: > | | | 2.9% {8ms} WideString(String)>>findSubstring:in:startingAt:matchTable: > | | 1.4% {4ms} primitives > |7.2% {20ms} Set(Collection)>>addAll: > | |5.0% {14ms} Set>>add: > | | |3.6% {10ms} Set>>scanFor: > | | | |3.6% {10ms} ByteString(String)>>= > | | |1.4% {4ms} Set(HashedCollection)>>atNewIndex:put: > | | | 1.4% {4ms} Set(HashedCollection)>>fullCheck > | | | 1.4% {4ms} Set>>grow > | |1.4% {4ms} OrderedCollection>>do: > |5.4% {15ms} ArtistLister>>generateMap: > | |5.4% {15ms} IdentityDictionary(Dictionary)>>at:put: > | | 3.9% {11ms} Dictionary(HashedCollection)>>atNewIndex:put: > | | |3.2% {9ms} Dictionary(HashedCollection)>>fullCheck > | | | 2.5% {7ms} Dictionary(HashedCollection)>>grow > | | | 1.4% {4ms} Dictionary>>noCheckAdd: > | | | 1.4% {4ms} Dictionary(HashedCollection)>>findElementOrNil: > | | 1.4% {4ms} IdentityDictionary(HashedCollection)>>findElementOrNil: > |4.3% {12ms} OrderedCollection>>collect: > | |4.3% {12ms} OrderedCollection>>addLast: > |4.3% {12ms} Dictionary>>at: > | |4.3% {12ms} Dictionary>>at:ifAbsent: > | | 2.2% {6ms} Dictionary(HashedCollection)>>findElementOrNil: > | | |2.2% {6ms} Dictionary>>scanFor: > | | | 1.4% {4ms} ByteString(String)>>= > | | 2.2% {6ms} primitives > |3.9% {11ms} ByteString(String)>>trimmed > | 3.9% {11ms} ByteString(String)>>trimBoth > | 3.2% {9ms} ByteString(String)>>trimBoth: > | 2.2% {6ms} primitives > 19.4% {54ms} ArtistLister>>popularPairsIn:onlyKeeping: > |15.8% {44ms} OrderedCollection(Collection)>>asBag > | |15.8% {44ms} Bag class(Collection class)>>withAll: > | | 15.8% {44ms} Bag(Collection)>>addAll: > | | 13.6% {38ms} Bag>>add: > | | |13.6% {38ms} Bag>>add:withOccurrences: > | | | 10.0% {28ms} Dictionary>>at:put: > | | | |8.6% {24ms} Dictionary(HashedCollection)>>findElementOrNil: > | | | | |7.9% {22ms} Dictionary>>scanFor: > | | | | | 4.7% {13ms} Array(SequenceableCollection)>>hash > | | | | | |3.2% {9ms} primitives > | | | | | 2.5% {7ms} Array(SequenceableCollection)>>= > | | | | | 2.5% {7ms} Array(SequenceableCollection)>>hasEqualElements: > | | | | | 1.4% {4ms} primitives > | | | |1.4% {4ms} Dictionary(HashedCollection)>>atNewIndex:put: > | | | 3.6% {10ms} Dictionary>>at:ifAbsent: > | | | 2.2% {6ms} Dictionary(HashedCollection)>>findElementOrNil: > | | | |2.2% {6ms} Dictionary>>scanFor: > | | | | 1.4% {4ms} Array(SequenceableCollection)>>= > | | | | 1.4% {4ms} Array(SequenceableCollection)>>hasEqualElements: > | | | 1.4% {4ms} primitives > | | 2.2% {6ms} OrderedCollection>>do: > |2.5% {7ms} ArtistLister>>uniquePairs:do: > 4.3% {12ms} ArtistLister>>bandsAboveThresholdIn: > |4.3% {12ms} Bag(Collection)>>addAll: > | 4.3% {12ms} Bag>>add: > | 4.3% {12ms} Bag>>add:withOccurrences: > | 2.5% {7ms} Dictionary>>at:put: > | 1.8% {5ms} Dictionary>>at:ifAbsent: > 3.2% {9ms} Set>>includes: > 2.5% {7ms} Set(HashedCollection)>>findElementOrNil: > 2.5% {7ms} Set>>scanFor: > > **Leaves** > 6.8% {19ms} WideString(String)>>asOctetString > 6.5% {18ms} ByteString(String)>>= > 5.4% {15ms} Dictionary>>at:ifAbsent: > 5.0% {14ms} WideString>>at:put: > 5.0% {14ms} WideString class>>from: > 5.0% {14ms} MultiByteFileStream>>next: > 5.0% {14ms} WideString(String)>>isOctetString > 4.7% {13ms} WideString class(String class)>>indexOfAscii:inString:startingAt: > 4.3% {12ms} OrderedCollection>>addLast: > 3.9% {11ms} WideString>>at: > 3.6% {10ms} Array(SequenceableCollection)>>do: > 3.6% {10ms} OrderedCollection>>do: > 3.2% {9ms} Set>>scanFor: > 3.2% {9ms} Dictionary(HashedCollection)>>atNewIndex:put: > 3.2% {9ms} Array(SequenceableCollection)>>hash > 2.5% {7ms} ArtistLister>>uniquePairs:do: > 2.2% {6ms} Dictionary>>scanFor: > 2.2% {6ms} Character class>>value: > 2.2% {6ms} ByteString(String)>>trimBoth: > 2.2% {6ms} Array(SequenceableCollection)>>hasEqualElements: > 1.8% {5ms} Array class(Behavior)>>inheritsFrom: > 1.4% {4ms} ByteString(SequenceableCollection)>>split:indicesDo: > 1.4% {4ms} SmallInteger>>hashMultiply > 1.4% {4ms} Dictionary(HashedCollection)>>findElementOrNil: > > **Memory** > old +5,124,784 bytes > young -340,984 bytes > used +4,783,800 bytes > free +295,464 bytes > > **GCs** > full 0 totalling 0ms (0.0% uptime) > incr 22 totalling 22ms (8.0% uptime), avg 1.0ms > tenures 15 (avg 1 GCs/tenure) > root table 0 overflows >

Oct. 5, 2014

Re: [Pharo-users] Spur images

by Benjamin Pollack

On Fri, 03 Oct 2014 16:13:35 -0400, stepharo <stepharo(a)free.fr> wrote: >> Looking at MessageTally, it seems at least half of that 278ms is spent >> noodling around in WideStrings and other small things that the Spur >> object format ought to help with, so it'd be interesting to see how much >> of a speed boost that gives without any further work. > tell us more about your algo because we want to know. It's not that exciting (it's a problem we give job applicants as a take-home coding test), but I'll describe it, since it highlights a common corner where Pharo does not perform terribly well. Basically, we give you a pile of play lists (a text file where each line is "Song1,Song2,Song3" and so on, representing a single play list), and then ask you to tell us which songs appear frequently together (where "frequently" is something we define--say, at least 100 times, for example). While there are interesting complex algorithms, a simple one that works well for small datasets is simply to walk all of play lists and build up a hashtable that maps pairs of bands to a count, then walk the hashtable and print out any keys whose counts are over the threshold. If this sounds like "dump all the permutations of each play list into a Bag and then walk Bag>>valuesAndCounts," you're right. As I said, it's not that complex. Python does very well on this because it hits on three things--hashtables, sets, and string processing--for which Python has obscenely good implementations in carefully optimized C. (In fact, the 80ms time I quoted you is surprisingly close to the maximum speed you can get with genuine C or C++ implementation on the sample dataset as well.) Pharo struggles to match Python for the same three reasons, but *especially* because its String functions are just much slower. In fact, if you implement the algorithm I described above naÃ¯vely in Pharo, the execution time is about 780ms--nearly ten times slower. After some reflection, I chopped the time to 270ms by converting all the band names to integers as the first step of the process (ArtistLister>>generateMap: in the profile trace below). Not only does this avoid WideString>>hash and friends; it also allows me to bring in IdentityDictionary and IdentitySet in most locations due to Pharo's object format. But there's a lot left. I'm attaching the profile output below. Notice that Pharo spends more time reading and processing the file (about 120ms) than the Python program spends executing total. --Benjamin - 279 tallies, 279 msec. **Tree** -------------------------------- Process: (40s) Morphic UI Process: nil -------------------------------- 69.2% {193ms} ArtistLister>>groupsIn: |18.6% {52ms} FileReference(AbstractFileReference)>>contents | |17.6% {49ms} MultiByteFileStream(FileStream)>>contents | | 17.6% {49ms} MultiByteFileStream>>next: | | 5.0% {14ms} ByteString>>at:put: | | |5.0% {14ms} WideString class>>from: | | 5.0% {14ms} WideString>>at:put: | | 5.0% {14ms} primitives | | 1.4% {4ms} MultiByteFileStream>>next | | 1.4% {4ms} UTF8TextConverter>>nextFromStream: |14.7% {41ms} WideString(String)>>lines | |14.7% {41ms} WideString(String)>>linesDo: | | 10.0% {28ms} WideString>>copyFrom:to: | | |5.4% {15ms} WideString(String)>>isOctetString | | | |3.2% {9ms} WideString>>at: | | | | |2.2% {6ms} Character class>>value: | | | |2.2% {6ms} primitives | | |4.7% {13ms} WideString(String)>>asOctetString | | | 3.6% {10ms} primitives | | 4.7% {13ms} WideString(String)>>lineIndicesDo: | | 4.7% {13ms} WideString(String)>>indexOf:startingAt: | | 4.7% {13ms} WideString class(String class)>>indexOfAscii:inString:startingAt: |10.8% {30ms} ByteString(Object)>>split: | |10.0% {28ms} ByteString(Object)>>split:do: | | 5.7% {16ms} WideString>>copyFrom:to: | | |3.2% {9ms} WideString(String)>>asOctetString | | |2.5% {7ms} WideString(String)>>isOctetString | | | 1.8% {5ms} primitives | | 4.3% {12ms} ByteString(SequenceableCollection)>>split:indicesDo: | | 2.9% {8ms} WideString(SequenceableCollection)>>indexOfSubCollection:startingAt: | | |2.9% {8ms} WideString(String)>>indexOfSubCollection:startingAt:ifAbsent: | | | 2.9% {8ms} WideString(String)>>findString:startingAt: | | | 2.9% {8ms} WideString(String)>>findString:startingAt:caseSensitive: | | | 2.9% {8ms} WideString(String)>>findSubstring:in:startingAt:matchTable: | | 1.4% {4ms} primitives |7.2% {20ms} Set(Collection)>>addAll: | |5.0% {14ms} Set>>add: | | |3.6% {10ms} Set>>scanFor: | | | |3.6% {10ms} ByteString(String)>>= | | |1.4% {4ms} Set(HashedCollection)>>atNewIndex:put: | | | 1.4% {4ms} Set(HashedCollection)>>fullCheck | | | 1.4% {4ms} Set>>grow | |1.4% {4ms} OrderedCollection>>do: |5.4% {15ms} ArtistLister>>generateMap: | |5.4% {15ms} IdentityDictionary(Dictionary)>>at:put: | | 3.9% {11ms} Dictionary(HashedCollection)>>atNewIndex:put: | | |3.2% {9ms} Dictionary(HashedCollection)>>fullCheck | | | 2.5% {7ms} Dictionary(HashedCollection)>>grow | | | 1.4% {4ms} Dictionary>>noCheckAdd: | | | 1.4% {4ms} Dictionary(HashedCollection)>>findElementOrNil: | | 1.4% {4ms} IdentityDictionary(HashedCollection)>>findElementOrNil: |4.3% {12ms} OrderedCollection>>collect: | |4.3% {12ms} OrderedCollection>>addLast: |4.3% {12ms} Dictionary>>at: | |4.3% {12ms} Dictionary>>at:ifAbsent: | | 2.2% {6ms} Dictionary(HashedCollection)>>findElementOrNil: | | |2.2% {6ms} Dictionary>>scanFor: | | | 1.4% {4ms} ByteString(String)>>= | | 2.2% {6ms} primitives |3.9% {11ms} ByteString(String)>>trimmed | 3.9% {11ms} ByteString(String)>>trimBoth | 3.2% {9ms} ByteString(String)>>trimBoth: | 2.2% {6ms} primitives 19.4% {54ms} ArtistLister>>popularPairsIn:onlyKeeping: |15.8% {44ms} OrderedCollection(Collection)>>asBag | |15.8% {44ms} Bag class(Collection class)>>withAll: | | 15.8% {44ms} Bag(Collection)>>addAll: | | 13.6% {38ms} Bag>>add: | | |13.6% {38ms} Bag>>add:withOccurrences: | | | 10.0% {28ms} Dictionary>>at:put: | | | |8.6% {24ms} Dictionary(HashedCollection)>>findElementOrNil: | | | | |7.9% {22ms} Dictionary>>scanFor: | | | | | 4.7% {13ms} Array(SequenceableCollection)>>hash | | | | | |3.2% {9ms} primitives | | | | | 2.5% {7ms} Array(SequenceableCollection)>>= | | | | | 2.5% {7ms} Array(SequenceableCollection)>>hasEqualElements: | | | | | 1.4% {4ms} primitives | | | |1.4% {4ms} Dictionary(HashedCollection)>>atNewIndex:put: | | | 3.6% {10ms} Dictionary>>at:ifAbsent: | | | 2.2% {6ms} Dictionary(HashedCollection)>>findElementOrNil: | | | |2.2% {6ms} Dictionary>>scanFor: | | | | 1.4% {4ms} Array(SequenceableCollection)>>= | | | | 1.4% {4ms} Array(SequenceableCollection)>>hasEqualElements: | | | 1.4% {4ms} primitives | | 2.2% {6ms} OrderedCollection>>do: |2.5% {7ms} ArtistLister>>uniquePairs:do: 4.3% {12ms} ArtistLister>>bandsAboveThresholdIn: |4.3% {12ms} Bag(Collection)>>addAll: | 4.3% {12ms} Bag>>add: | 4.3% {12ms} Bag>>add:withOccurrences: | 2.5% {7ms} Dictionary>>at:put: | 1.8% {5ms} Dictionary>>at:ifAbsent: 3.2% {9ms} Set>>includes: 2.5% {7ms} Set(HashedCollection)>>findElementOrNil: 2.5% {7ms} Set>>scanFor: **Leaves** 6.8% {19ms} WideString(String)>>asOctetString 6.5% {18ms} ByteString(String)>>= 5.4% {15ms} Dictionary>>at:ifAbsent: 5.0% {14ms} WideString>>at:put: 5.0% {14ms} WideString class>>from: 5.0% {14ms} MultiByteFileStream>>next: 5.0% {14ms} WideString(String)>>isOctetString 4.7% {13ms} WideString class(String class)>>indexOfAscii:inString:startingAt: 4.3% {12ms} OrderedCollection>>addLast: 3.9% {11ms} WideString>>at: 3.6% {10ms} Array(SequenceableCollection)>>do: 3.6% {10ms} OrderedCollection>>do: 3.2% {9ms} Set>>scanFor: 3.2% {9ms} Dictionary(HashedCollection)>>atNewIndex:put: 3.2% {9ms} Array(SequenceableCollection)>>hash 2.5% {7ms} ArtistLister>>uniquePairs:do: 2.2% {6ms} Dictionary>>scanFor: 2.2% {6ms} Character class>>value: 2.2% {6ms} ByteString(String)>>trimBoth: 2.2% {6ms} Array(SequenceableCollection)>>hasEqualElements: 1.8% {5ms} Array class(Behavior)>>inheritsFrom: 1.4% {4ms} ByteString(SequenceableCollection)>>split:indicesDo: 1.4% {4ms} SmallInteger>>hashMultiply 1.4% {4ms} Dictionary(HashedCollection)>>findElementOrNil: **Memory** old +5,124,784 bytes young -340,984 bytes used +4,783,800 bytes free +295,464 bytes **GCs** full 0 totalling 0ms (0.0% uptime) incr 22 totalling 22ms (8.0% uptime), avg 1.0ms tenures 15 (avg 1 GCs/tenure) root table 0 overflows

Oct. 5, 2014

Re: [Pharo-users] How to create a package via code correctly ?

by Esteban Lorenzano

> On 05 Oct 2014, at 00:04, Nicolai Hess <nicolaihess(a)web.de> wrote: > > 2014-10-04 8:45 GMT+02:00 Esteban Lorenzano <estebanlm(a)gmail.com <mailto:estebanlm@gmail.com>>: > (RPackage named: 'ABC') register. > > or > > RPackageOrganizer default registerPackage: (RPackage named: 'ABCâ). > > or > > RPackageOrganizer default registerPackageNamed: âABCâ. > > the 3 ways work (just tested). > If you are not succeeding probably there is another, previous problem (like de-sync caused by some failed operation made before)â¦ > > cheers, > Esteban > > Does this include the SystemOrganization part? > (SystemOrganization addCategory: 'Keks4') > Or is this not neccessary anymore? that includes everything. even MC package registration (since now there is a one-to-one relation between them) Esteban > > > > > > On 04 Oct 2014, at 08:30, Ben Coman <btc(a)openInWorld.com> wrote: > > > > itlists(a)schrievkrom.de <mailto:itlists@schrievkrom.de> wrote: > >> How can I create a package correctly via code ? > >> I tried stuff like > >> PackageOrganizer default registerPackageNamed: 'Keks4' > >> SystemOrganization addCategory: 'Keks4' > >> but the package does not appear in the browser. > >> Marten > > > > I don't have a direct answer for you, since I don't know - but I can tell you how to discover the answer yourself (or at least how I would go about it myself) > > > > 1. Right-click in the package pane, and then bring up the Halos[1] on the menu-item-of-interest e.g. "Add package..." > > > > 2. From the Debug (spanner) halo menu choose "Inspect morph". Scroll down until you see something that looks like a method being called. Go to that method and put a "self halt" at the top. > > > > 3. Invoke the menu-item-of-interest, then in the debugger step through what it does, and copy that for your own purpose. > > > > Please report back if you succeed with this, or otherwise feel free to ask for more assistance. I just believe it helps you more to teach you how to fish :) rather than just give you one someone else caught. > > > > cheers -ben > > > > [1] http://web.cecs.pdx.edu/~black/OOP/Tutorial/Morphic%20Worksheet.html <http://web.cecs.pdx.edu/~black/OOP/Tutorial/Morphic%20Worksheet.html> > >

Oct. 5, 2014

Re: [Pharo-users] Installing GToolkit

by Tudor Girba

Hi Evan, The instructions are a bit wrong. It should be "activateWithoutSaving" instead of "activate". The GTImageSetupCommandLineHandler does more default settings. Just take a look at the activateWithoutSaving method and pick what you want, or use the script that Phil suggested only to install the tools. But, what do you mean when you say that the Playground is not working? Cheers, Doru On Sat, Oct 4, 2014 at 8:07 PM, Evan Donahue <emdonahu(a)gmail.com> wrote: > Hello, > > I am trying to check out GTPlaygroundl, but I can't seem to get it working > and was wondering if anyone had any idea what I might be overlooking. > > I download a new image with curl get.pharo.org | bash > I run, from http://www.humane-assessment.com/blog/installing-gtoolkit > > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > configuration; > loadDevelopment. > #GTImageSetupCommandLineHandler asClass new activate > > It loads for a while and then the image closes. When I open it again the > background is white and my settings have been wiped. The playground does > appear, but it doesn't seem to work properly (there seems to be no way to > advance the miller columns). Am I looking at the wrong installation > information? > > Thanks, > Evan > > > > -- www.tudorgirba.com "Every thing has its own flow"

Oct. 5, 2014

Re: [Pharo-users] NeoCSVReader skipEmptyLines?

by Esteban A. Maringolo

2014-10-04 10:47 GMT-03:00 Sven Van Caekenberghe <sven(a)stfx.eu>: > Esteban, > > On 04 Oct 2014, at 02:42, Esteban A. Maringolo <emaringolo(a)gmail.com> wrote: > >> Sven, >> >> Is it possible to skip blank/empty lines in NeoCSVReader? >> >> So if a line is empty or contains ",,,,,,,," it would be skipped from >> the iteration. >> >> Does it already provider such feature? (I couldn't find any setting >> related with this). >> >> Esteban A. Maringolo > > Could you elaborate a bit on the use case ? Yes, users upload a CSV file with the proper columns (sometimes they don't, but that's another story), and because they export/copy the CSV from Excel most of the times there are *lots* (might be hundreds) of empty lines at the end, it is, lines with separators only, or even blank lines. > My first reaction would be that you have to deal with these yourself afterwards. When dealing with "array based" records, it is, with no #recordClass defined it would be easier. Because you can check whether all the values of the array are empty or nil. So on each iteration (#next) you could return the value array if it isn't empty or send #next again until you get a record with any data. When working with a record class I think you can't do this, because it seems you instantiate the record before iterating through each field of the record. > What would be the definition of an empty record ? What about empty quoted fields ? An empty record of a four columns CSV file would look like: ,,, or (if some columns are quoted) ,"","", I don't see how a record like that could be of any use. Best regards! Esteban A. Maringolo > PS: I got your other contribution, I think it is OK to add, thanks. Great!

Oct. 5, 2014

Re: [Pharo-users] How to create a package via code correctly ?

by Nicolai Hess

2014-10-04 8:45 GMT+02:00 Esteban Lorenzano <estebanlm(a)gmail.com>: > (RPackage named: 'ABC') register. > > or > > RPackageOrganizer default registerPackage: (RPackage named: 'ABCâ). > > or > > RPackageOrganizer default registerPackageNamed: âABCâ. > > the 3 ways work (just tested). > If you are not succeeding probably there is another, previous problem > (like de-sync caused by some failed operation made before)â¦ > > cheers, > Esteban > Does this include the SystemOrganization part? (SystemOrganization addCategory: 'Keks4') Or is this not neccessary anymore? > > > > On 04 Oct 2014, at 08:30, Ben Coman <btc(a)openInWorld.com> wrote: > > > > itlists(a)schrievkrom.de wrote: > >> How can I create a package correctly via code ? > >> I tried stuff like > >> PackageOrganizer default registerPackageNamed: 'Keks4' > >> SystemOrganization addCategory: 'Keks4' > >> but the package does not appear in the browser. > >> Marten > > > > I don't have a direct answer for you, since I don't know - but I can > tell you how to discover the answer yourself (or at least how I would go > about it myself) > > > > 1. Right-click in the package pane, and then bring up the Halos[1] on > the menu-item-of-interest e.g. "Add package..." > > > > 2. From the Debug (spanner) halo menu choose "Inspect morph". Scroll > down until you see something that looks like a method being called. Go to > that method and put a "self halt" at the top. > > > > 3. Invoke the menu-item-of-interest, then in the debugger step through > what it does, and copy that for your own purpose. > > > > Please report back if you succeed with this, or otherwise feel free to > ask for more assistance. I just believe it helps you more to teach you how > to fish :) rather than just give you one someone else caught. > > > > cheers -ben > > > > [1] http://web.cecs.pdx.edu/~black/OOP/Tutorial/Morphic%20Worksheet.html > > > > >

Oct. 4, 2014

Re: [Pharo-users] Installing GToolkit

by phil＠highoctane.be

The following works for me on Pharo 3.0: Gofer new url: 'http://www.smalltalkhub.com/mc/Moose/GToolkit/main'; configuration; load. #ConfigurationOfGToolkit asClass loadDevelopment. "Use the inspector" #GTInspector asClass registerToolsOn: Smalltalk tools. "Use the debugger" #GTGenericStackDebugger asClass registerToolsOn: Smalltalk tools. "Use the playground" #GTPlayground asClass registerToolsOn: Smalltalk tools. "For back to normal workspace" #Workspace asClass registerToolsOn: Smalltalk tools. HTH Phil On Sat, Oct 4, 2014 at 8:07 PM, Evan Donahue <emdonahu(a)gmail.com> wrote: > Hello, > > I am trying to check out GTPlaygroundl, but I can't seem to get it working > and was wondering if anyone had any idea what I might be overlooking. > > I download a new image with curl get.pharo.org | bash > I run, from http://www.humane-assessment.com/blog/installing-gtoolkit > > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > configuration; > loadDevelopment. > #GTImageSetupCommandLineHandler asClass new activate > > It loads for a while and then the image closes. When I open it again the > background is white and my settings have been wiped. The playground does > appear, but it doesn't seem to work properly (there seems to be no way to > advance the miller columns). Am I looking at the wrong installation > information? > > Thanks, > Evan > > > >

Oct. 4, 2014

Re: [Pharo-users] Installing GToolkit

by stepharo

Evan if you take the latest version of Pharo 4.0 you will get GT installed :) On 4/10/14 20:07, Evan Donahue wrote: > Hello, > > I am trying to check out GTPlaygroundl, but I can't seem to get it > working and was wondering if anyone had any idea what I might be > overlooking. > > I download a new image with curl get.pharo.org <http://get.pharo.org> > | bash > I run, from http://www.humane-assessment.com/blog/installing-gtoolkit > > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > configuration; > loadDevelopment. > #GTImageSetupCommandLineHandler asClass new activate The last expression looks strange to me but I do not know the internal of GTToolkit > > It loads for a while and then the image closes. When I open it again > the background is white and my settings have been wiped. The > playground does appear, but it doesn't seem to work properly (there > seems to be no way to advance the miller columns). Am I looking at the > wrong installation information? > > Thanks, > Evan > > >

Oct. 4, 2014

Installing GToolkit

by Evan Donahue

Hello, I am trying to check out GTPlaygroundl, but I can't seem to get it working and was wondering if anyone had any idea what I might be overlooking. I download a new image with curl get.pharo.org | bash I run, from http://www.humane-assessment.com/blog/installing-gtoolkit Gofer new smalltalkhubUser: 'Moose' project: 'GToolkit'; configuration; loadDevelopment. #GTImageSetupCommandLineHandler asClass new activate It loads for a while and then the image closes. When I open it again the background is white and my settings have been wiped. The playground does appear, but it doesn't seem to work properly (there seems to be no way to advance the miller columns). Am I looking at the wrong installation information? Thanks, Evan

Oct. 4, 2014