- Pharo-users - lists.pharo.org

Re: [Pharo-users] Is a non-break space whitespace?

by stephan

On 25-09-17 09:53, Richard Sargent wrote: > Rather than off-the-cuffing anything, please honour the Unicode Character > Properties. Refer to > https://en.wikipedia.org/wiki/Unicode_character_property#Whitespace, among > others. That is a good idea. And it won't help you if you scrape data from the web, as you'll find plenty of bad encoding. And unclarity over which version of which standard was used (see mongolian vowel separator) Stephan

Sept. 25, 2017

Re: [Pharo-users] How to find if a method is being executed in a given process

by Steven Costiou

Le 2017-09-25 12:21, jtuchel(a)objektfabrik.de wrote : > Steven > > You could add use a semaphore if changing code is an option. > We once used MethodWrappers in VAST to answer a similar question regarding whether a body of code can be removed from a system. > > Joachim This is exactly my usecase, i need to remove code that may be called by a method on the stack - and i know exactly which method. However my base hypothesis is that it is in an already running process (maybe a loop) and that part i cannot change. Is there an existing Pharo implementation of MethodWrappers ? Le 2017-09-25 14:32, Ben Coman wrote : > I'm not sure if your wanting something more built in, or just "some way", > > so for the latter, consider wrapping in with your own status flags... > > status := #setup. > watcher := [[true] whileTrue:[ > Transcript crShow: status. > 900 milliSeconds wait] > ] forkAt:36. > result := 0. > worker := [[true] whileTrue:[ > status := #WORKING. > 1 second wait. > result := result + 1. > Transcript crShow: result. > status:=#waiting. > 3 seconds wait] > ] forkAt:35. > worker suspend. > worker resume. > > cheers -ben I want to avoid adding control in the code, because hypothetically the process i want to check is already running and possibly written by somebody else. I've think about a similar solution using metalinks, but if the loop is on the stack then i don't know what i can do. Le 2017-09-25 12:42, Marcus Denker a wrote : > you could iterate all processes, there then get the stack and look up the sender chain > if the method is somewhere to be found. If yes -> it is exectuted right now. > One problem is that which methods are on the stack changes, so you should > try to avoid process switches while doing the analysis. > > Marcus Ok so if i know which process to analyse, i can just do something like the following that i found in the Halt class: [ cntxt isNil ] whileFalse: [ cntxt selector = aSelector ifTrue: [ ... ]. cntxt := cntxt sender ] But if i actually found the method i was looking for on the stack, can i somehow ask the suspended context to "execute" until it returns from this method ? Steven.

Sept. 25, 2017

Testing a Unicode Character's Category

by Prof. Andrew P. Black

The Pharo image has a table of Unicode Character Categories in a class variable GeneralCategory of class Unicode. But there do not seem to be many methods to interpret this data. For example, while there is a method Unicode class >> #isDigit: aCharacter that checks if the Unicode category of aCharacter is Nd, and Unicode class >> #isLetter: aCharacter that checks if aCharacter is in one of the letter categories, there does not seem to be a general way of asking âwhat is the category of this characterâ. I want to check if a character is a mathematical symbol, that is, if it is in the Unicode Category Sm. Whatâs the right way of doing this? Would it be reasonable to add a method Unicode class >> #category: aCharacter that answers one of the 29 category symbols #Cc to #Zs? Or âisâ methods for each category? Andrew

Sept. 25, 2017

Re: [Pharo-users] How to find if a method is being executed in a given process

by Ben Coman

On Mon, Sep 25, 2017 at 6:06 PM, Steven Costiou <steven.costiou(a)kloum.io> wrote: > Hi, > > how can i know if a given method is being executed ? > > For ex.: > > process := [[mycondition] whileTrue:[ myObject doStuff. myDelay wait]] fork > > I want to suspend process and find if doStuff is being executed or if > process is waiting. > I'm not sure if your wanting something more built in, or just "some way", so for the latter, consider wrapping in with your own status flags... status := #setup. watcher := [[true] whileTrue:[ Transcript crShow: status. 900 milliSeconds wait] ] forkAt:36. result := 0. worker := [[true] whileTrue:[ status := #WORKING. 1 second wait. result := result + 1. Transcript crShow: result. status:=#waiting. 3 seconds wait] ] forkAt:35. worker suspend. worker resume. cheers -ben

Sept. 25, 2017

Re: [Pharo-users] Is a non-break space whitespace?

by Ben Coman

On Mon, Sep 25, 2017 at 3:53 PM, Richard Sargent < richard.sargent(a)gemtalksystems.com> wrote: > Ben Coman wrote > > On Sun, Sep 24, 2017 at 7:53 PM, PBKResearch < > > > peter@.co > > > > > > wrote: > > > >> Hello All > >> > >> > >> > >> I have a little puzzle to disturb your Sunday lunch, maybe. I have been > >> scraping text data from web pages, which often comes with redundant > space > >> before or after. I routinely use âtrimâ on the final string output, but > I > >> have found cases where there are still redundant spaces. Inspecting the > >> results, I find that the characters are non-break spaces (codepoint 160, > >> Unicode U+00A0). Looking at the code, String>>#trim depends on > >> Character>>#isSeparator, which does not answer true for a non-break > >> space. > >> I can use trimBoth: [:char| char asInteger = 160] to remove the > redundant > >> spaces if I know where to expect them, so it is not a major problem. But > >> the question remains: should non-break space be included in the list of > >> separators in Character>>#isSeparator. > >> > >> > >> > >> Peter Kenny > >> > >> > >> > > > > Off the cuff.. intuitively "by definition" a Non-Break space seems to be > > Not-a-Separator. > > If the web pages you are scraping are misusing non-break space to munge > > formatting, that is not something to be solved by modifying semantics of > > #isSeparator. > > Stef's suggestion for a selector that takes a list of separators seems > > appropriate. > > > Rather than off-the-cuffing anything, please honour the Unicode Character > Properties. Refer to > https://en.wikipedia.org/wiki/Unicode_character_property#Whitespace, among > others. > I hope it was clear I wasn't speaking from a position of authoritative knowledge.. Nice to learn something new. Thanks for the correction. cheers -ben

Sept. 25, 2017

Re: [Pharo-users] How to find if a method is being executed in a given process

by Marcus Denker

> On 25 Sep 2017, at 12:06, Steven Costiou <steven.costiou(a)kloum.io> wrote: > > Hi, > > how can i know if a given method is being executed ? > > For ex.: > > process := [[mycondition] whileTrue:[ myObject doStuff. myDelay wait]] fork > > I want to suspend process and find if doStuff is being executed or if process is waiting. > > How could i do that ?] > > you could iterate all processes, there then get the stack and look up the sender chain if the method is somewhere to be found. If yes -> it is exectuted right now. One problem is that which methods are on the stack changes, so you should try to avoid process switches while doing the analysis. Marcus

Sept. 25, 2017

Re: [Pharo-users] How to find if a method is being executed in a given process

by jtuchel＠objektfabrik.de

Steven You could add use a semaphore if changing code is an option. We once used MethodWrappers in VAST to answer a similar question regarding whether a body of code can be removed from a system. Joachim Am 25.09.17 um 12:06 schrieb Steven Costiou: > > Hi, > > how can i know if a given method is being executed ? > > For ex.: > > process := [[mycondition] whileTrue:[ myObject doStuff. myDelay wait]] > fork > > I want to suspend process and find if doStuff is being executed or if > process is waiting. > > How could i do that ? > > Steven. > -- ----------------------------------------------------------------------- Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de Fliederweg 1Â Â Â Â Â Â Â Â Â Â Â Â Â http://www.objektfabrik.de D-71640 Ludwigsburg http://joachimtuchel.wordpress.com Telefon: +49 7141 56 10 86 0Â Â Â Â Â Fax: +49 7141 56 10 86 1

Sept. 25, 2017

How to find if a method is being executed in a given process

by Steven Costiou

Hi, how can i know if a given method is being executed ? For ex.: process := [[mycondition] whileTrue:[ myObject doStuff. myDelay wait]] fork I want to suspend process and find if doStuff is being executed or if process is waiting. How could i do that ? Steven.

Sept. 25, 2017

Re: [Pharo-users] Is a non-break space whitespace?

by PBKResearch

Hello One way of dealing with this in a general way is to introduce a new predicate #isWhitespace for Character, maybe following the Wikipedia definition as Richard suggests, and then either (a) recode String>>#trim and friends to use #isWhitespace rather than #isSeparator or (b) introduce a new operation String>>#trimWhitespace which uses #isWhitespace. @stef. There is already an operation which allows us to specify the characters to be trimmed, which I mentioned in my original post. We write trimBoth: aBlock, where aBlock value: char answers true if char is to be trimmed. I knew I could solve my immediate problem like this; I just wondered if there should be something more general. Peter Kenny From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of Sven Van Caekenberghe Sent: 25 September 2017 09:10 To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> Subject: Re: [Pharo-users] Is a non-break space whitespace? On 25 Sep 2017, at 09:53, Richard Sargent <richard.sargent(a)gemtalksystems.com <mailto:richard.sargent@gemtalksystems.com> > wrote: Ben Coman wrote On Sun, Sep 24, 2017 at 7:53 PM, PBKResearch < <mailto:peter@.co> peter@.co > wrote: Hello All I have a little puzzle to disturb your Sunday lunch, maybe. I have been scraping text data from web pages, which often comes with redundant space before or after. I routinely use âtrimâ on the final string output, but I have found cases where there are still redundant spaces. Inspecting the results, I find that the characters are non-break spaces (codepoint 160, Unicode U+00A0). Looking at the code, String>>#trim depends on Character>>#isSeparator, which does not answer true for a non-break space. I can use trimBoth: [:char| char asInteger = 160] to remove the redundant spaces if I know where to expect them, so it is not a major problem. But the question remains: should non-break space be included in the list of separators in Character>>#isSeparator. Peter Kenny Off the cuff.. intuitively "by definition" a Non-Break space seems to be Not-a-Separator. If the web pages you are scraping are misusing non-break space to munge formatting, that is not something to be solved by modifying semantics of #isSeparator. Stef's suggestion for a selector that takes a list of separators seems appropriate. Rather than off-the-cuffing anything, please honour the Unicode Character Properties. Refer to https://en.wikipedia.org/wiki/Unicode_character_property#Whitespace, among others. The Pharo Unicode Project (http://www.smalltalkhub.com/#!/~Pharo/Unicode) offers support for these properties. There is a performance cost though (it is a big database to load/use). I would not immediately change #isSeparator though. cheers -ben -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Sept. 25, 2017

Re: [Pharo-users] Is a non-break space whitespace?

by Sven Van Caekenberghe

> On 25 Sep 2017, at 09:53, Richard Sargent <richard.sargent(a)gemtalksystems.com> wrote: > > Ben Coman wrote >> On Sun, Sep 24, 2017 at 7:53 PM, PBKResearch < > >> peter@.co > >> > >> wrote: >> >>> Hello All >>> >>> >>> >>> I have a little puzzle to disturb your Sunday lunch, maybe. I have been >>> scraping text data from web pages, which often comes with redundant space >>> before or after. I routinely use âtrimâ on the final string output, but I >>> have found cases where there are still redundant spaces. Inspecting the >>> results, I find that the characters are non-break spaces (codepoint 160, >>> Unicode U+00A0). Looking at the code, String>>#trim depends on >>> Character>>#isSeparator, which does not answer true for a non-break >>> space. >>> I can use trimBoth: [:char| char asInteger = 160] to remove the redundant >>> spaces if I know where to expect them, so it is not a major problem. But >>> the question remains: should non-break space be included in the list of >>> separators in Character>>#isSeparator. >>> >>> >>> >>> Peter Kenny >>> >>> >>> >> >> Off the cuff.. intuitively "by definition" a Non-Break space seems to be >> Not-a-Separator. >> If the web pages you are scraping are misusing non-break space to munge >> formatting, that is not something to be solved by modifying semantics of >> #isSeparator. >> Stef's suggestion for a selector that takes a list of separators seems >> appropriate. > > > Rather than off-the-cuffing anything, please honour the Unicode Character > Properties. Refer to > https://en.wikipedia.org/wiki/Unicode_character_property#Whitespace, among > others. The Pharo Unicode Project (http://www.smalltalkhub.com/#!/~Pharo/Unicode) offers support for these properties. There is a performance cost though (it is a big database to load/use). I would not immediately change #isSeparator though. >> cheers -ben > > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Sept. 25, 2017