December 2010 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] Help me

by Miguel CobÃ¡

El jue, 02-12-2010 a las 00:42 -0800, Geert Claes escribiÃ³: > Hi Nithya, I have moved your post to the Nabble mailing list. > > > Nithya wrote: > > When executing this program it showing "client := CassandraClient > > binaryOnHost: 'localhost' port: 9160." is undefined. > > > > Did you file in the two files generated: thrift/lib/st/thrift.st gen-st/cassandra.st This will create the CassandraClient class in your image. If they didn't load, the class won't exist. Also, make sure the Cassandra server is running in order to the client to connect and write the data Cheers -- Miguel CobÃ¡ http://twitter.com/MiguelCobaMtz http://miguel.leugim.com.mx

Dec. 2, 2010

Re: [Pharo-project] Issue 3367 in pharo: PopupChoiceDialogWindow>>handlesKeyboard: fails with empty label list

by pharo＠googlecode.com

Updates: Status: Fixed Comment #1 on issue 3367 by aplantec: PopupChoiceDialogWindow>>handlesKeyboard: fails with empty label list http://code.google.com/p/pharo/issues/detail?id=3367 INBOX SLICE-Issue-3367-PopupChoiceDialogWindow-handlesKeyboard-fails-with-empty-label-list

Dec. 2, 2010

[Pharo-project] Issue 3367 in pharo: PopupChoiceDialogWindow>>handlesKeyboard: fails with empty label list

by pharo＠googlecode.com

Status: Accepted Owner: aplantec Labels: Milestone-1.2 New issue 3367 by aplantec: PopupChoiceDialogWindow>>handlesKeyboard: fails with empty label list http://code.google.com/p/pharo/issues/detail?id=3367 For example, dnu when trying to add a category to a Trait from the browser

Dec. 2, 2010

Re: [Pharo-project] Issue 3283 in pharo: Symbol dependencie

by pharo＠googlecode.com

Updates: Labels: Type-Seed Comment #6 on issue 3283 by Benjamin.VanRyseghem.Pharo: Symbol dependencie http://code.google.com/p/pharo/issues/detail?id=3283 (No comment was entered for this change.)

Dec. 2, 2010

Re: [Pharo-project] Issue 3283 in pharo: Symbol dependencie

by pharo＠googlecode.com

Updates: Status: Fixed Comment #5 on issue 3283 by Benjamin.VanRyseghem.Pharo: Symbol dependencie http://code.google.com/p/pharo/issues/detail?id=3283 (No comment was entered for this change.)

Dec. 2, 2010

Re: [Pharo-project] Issue 1594 in pharo: refactor to use #ifNil:

by Levente Uzonyi

On Thu, 2 Dec 2010, Peter van Rooijen wrote: > I agree, > > If you want to know if a object is the same object as > that designated by the expression nil, you use the message #== > (this message had guaranteed semantics since it can not be redefined). > > If you want to know if the message ifNil: aBlock sent to the object > evaluates the block argument, you use the message #ifNil: > (which could do anything it has been defined to do > - at least, I would hope so!). > > Those two uses are distinct and mean something different. In theory yes, but the compiler also inlines #ifNil:, #ifNil:ifNotNil:, #ifNotNil: and #ifNotNil:ifNil: if the arguments are literal blocks. So in that case, they are equivalent with == nil ifTrue:/ifFalse:. Levente > > Cheers, Peter > > On Mon, 22 Nov 2010 21:08:23 +0100, <pharo(a)googlecode.com> wrote: > >> >> Comment #12 on issue 1594 by patchi...(a)gmail.com: refactor to use #ifNil: >> http://code.google.com/p/pharo/issues/detail?id=1594 >> >> It would be great to review this issue cause it's on Accepted state and i >> lots of ppl don't agree with it. >> >> Ocurrences of = nil or ~= nil were no more than ten but there're at least >> 800+ ocurrences of == nil or ~~ nil in PharoCore image so far. >> >> > > > -- > Peter van Rooijen > Nijlring 83 > 5152 VJ Drunen > m: 06-2854 2048 >

Dec. 2, 2010

Re: [Pharo-project] Issue 1594 in pharo: refactor to use #ifNil:

by Peter van Rooijen

I agree, If you want to know if a object is the same object as that designated by the expression nil, you use the message #== (this message had guaranteed semantics since it can not be redefined). If you want to know if the message ifNil: aBlock sent to the object evaluates the block argument, you use the message #ifNil: (which could do anything it has been defined to do - at least, I would hope so!). Those two uses are distinct and mean something different. Cheers, Peter On Mon, 22 Nov 2010 21:08:23 +0100, <pharo(a)googlecode.com> wrote: > > Comment #12 on issue 1594 by patchi...(a)gmail.com: refactor to use #ifNil: > http://code.google.com/p/pharo/issues/detail?id=1594 > > It would be great to review this issue cause it's on Accepted state and > i lots of ppl don't agree with it. > > Ocurrences of = nil or ~= nil were no more than ten but there're at > least 800+ ocurrences of == nil or ~~ nil in PharoCore image so far. > > -- Peter van Rooijen Nijlring 83 5152 VJ Drunen m: 06-2854 2048

Dec. 2, 2010

Re: [Pharo-project] is there an easy way to know the SmallInteger instances?

by Peter van Rooijen

Mariano, SmallIntegers don't really exist as objects. The compiler/vm only make you think they exist. In fact they are encoded in the object pointer. Perhaps you knew this already. As to the other question, how many variables hold a SmallInteger, you cannot really calculate that for temp vars, although you could get a good stab at it if you are determined. For instance variables, you collect all objects in the image in a collection, then for each element you enumerate from 1 to the number of named instvars using x class instSize and instVarAt: and also the indexed inst vars using basicSize and basicAt: and each time you test if the class is SmallInteger and if so you increment a counter Does that help? Cheers, Peter On Mon, 22 Nov 2010 00:48:03 +0100, Mariano Martinez Peck <marianopeck(a)gmail.com> wrote: > On Mon, Nov 22, 2010 at 12:10 AM, Eliot Miranda > <eliot.miranda(a)gmail.com> wrote: >> On Sun, Nov 21, 2010 at 2:59 PM, Mariano Martinez Peck >> <marianopeck(a)gmail.com> wrote: >>> On Sun, Nov 21, 2010 at 11:55 PM, Schwab,Wilhelm K >>> <bschwab(a)anest.ufl.edu> wrote: >>>> Mariano, >>>> I see your point, but given the immediate object encoding tricks I'm >>>> not sure it's possible. >>> :( It's a pity. Because most users should not be aware of this. This >>> should be completly transparent for the developer. >>> >>>> Would the class methods #minVal and #maxVal be of any use to you? >>> No :( Maybe it is better in this way: I want to know how many >>> instances/temp var have a SmallInetger. This means, how many >>> slots/words have a 1 in the last bit. This is what I understand by >>> "Smallinteger instances". >> That's the number of references to SmallInteger. > ok...and how can I know this then? ;) > >> If all those slots contain references to 0 then they're still referring >> to a single object. The number of instances of SmallInteger is >> SmallInteger maxVal - SmallInteger minVal + 1, period. > isn't that all the MAX possible instances??? If in my whole image, I > never use the number 42, why would you count it? > >> But they're virtual objects so they don't take any space; only their >> references take space. (IMO) > Ok, at least we agree it cannot be zero. At least it is not clear from a > normal developer that doesnt know anything about the VM. >> So you could implement >> SmallInteger class>>instanceCount >> ^self maxVal - self minVal + 1 >> SmallInteger class>>allInstances >> ^self minVal to: self maxVal >> you could implement the following but it's of academic interest only; >> it'll take a long time on a 64-bit implementation ;) If you add this >> then you have to guard against it being invoked because shure as s**t >> someone will wonder why the system isn't doing anything when they ask >> some apparently reasonable question about instance counts... >> SmallInteger class>>allInstancesDo: aBlock >> self minVal to: self maxVal do: aBlock >> best >> Eliot >>> >>>> Bill >>>> ________________________________________ >>>> From: pharo-project-bounces(a)lists.gforge.inria.fr >>>> [pharo-project-bounces(a)lists.gforge.inria.fr] On Behalf Of Mariano >>>> Martinez Peck [marianopeck(a)gmail.com] >>>> Sent: Sunday, November 21, 2010 4:41 PM >>>> To: Pharo Development >>>> Subject: [Pharo-project] is there an easy way to know the >>>> SmallInteger instances? >>>> If I do SmallInteger alIInstances I get an empty array, and of >>>> course, with SmallInteger instanceCount I get zero. >>>> Now, I can understand that from the VM point of view, but for the >>>> final user, this should be polymorphic. For example, for >>>> instanceCount, I would like to know all the "variable slots" that has >>>> a 1 in the last bit. >>>> Is this already possible? if true, which message? if not, should >>>> I hack in the vm and code a primitive that does this? >>>> And the same for allInstances, if I can inspect 5, I should be also >>>> to inspect SmallInteger allInstances, and SmallInteger allInstances >>>> first, etc.... >>>> thanks >>>> Mariano -- Peter van Rooijen Nijlring 83 5152 VJ Drunen m: 06-2854 2048

Dec. 2, 2010

Re: [Pharo-project] FFI question. Is it possible to unload loaded external library

by Mariano Martinez Peck

On Wed, Dec 1, 2010 at 10:44 PM, Denis Kudriashov <dionisiydk(a)gmail.com>wrote: > By loaded dll I mean what happens when I call some dll function. > Ok.....but this is done automatically by FFI. I mean, you don't need to code something to get the library loaded. > After this I can't update this dll. > By updating you mean that you would like to change the library to a new version while pharo is running and you would like to use the new version? > > I will try #unloadModule: as Igor adviced > > 2010/12/1 Mariano Martinez Peck <marianopeck(a)gmail.com> > > >> >> On Tue, Nov 30, 2010 at 9:35 PM, Denis Kudriashov <dionisiydk(a)gmail.com>wrote: >> >>> Hello, >>> >>> I need implement remote updating some dll's for running pharo >>> application. This dll's used by FFI. >>> I want done this by unloading dll from VM. Then loading new updated dll. >>> And then continue app execution. >>> Is it possible? >>> >> >> what does it mean exactly to "load" a dll and "unload" ?? >> cheers >> >> mariano >> >> >>> >>> Or only way is to restart pharo? >>> >> >> >

Dec. 2, 2010

Re: [Pharo-project] Help me

by Geert Claes

Hi Nithya, I have moved your post to the Nabble mailing list. Nithya wrote: > > Sir, > > I follow the web link http://miguel.leugim.com.mx/index.php/tag/pharo/. > I installed the Pharo smalltalk for Accessing Cassandra Database. > > PharoCore images and thrift0.4.0,cassandra0.6.6 are downloaded. > And load the cassandra.st,thrift.st in the Pharo image cassandraclient. > > > I added the following coding in the Pharo workspace to access > Cassandra Database. > > "Insert 10000 values" > [| cp result client | > client := CassandraClient binaryOnHost: 'localhost' port: 9160. > > cp := ColumnPath new > columnFamily: 'Standard1'; > column: 'col1'. > 1 to: 10000 do: [ :i | > result := client insertKeyspace: 'Keyspace1' > key: 'row', i asString > columnPath: cp > > value: 'v', i asString > timestamp: 1 > consistencyLevel: ((Cassandra enums at: 'ConsistencyLevel') at: > 'QUORUM').]] timeToRun > > > When executing this program it showing "client := CassandraClient > binaryOnHost: 'localhost' port: 9160." is undefined. > > > > Regards, > > Nithya.S > > -- View this message in context: http://forum.world.st/Help-me-tp3068677p3068687.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

Dec. 2, 2010