February 2017 - Pharo-users

About asSymbol message , some questions in my mind

by lb

Thank you, Sven gradually clear. 1. Symbol as String subclass, only guarantees a symbol object only one in system, use ==; 2. keywords (selector name method name) are spectial symbols, without space or forbided characters; 3. perform: aSymbol, means perform: aKeyword, Should we add asKeyword to String, let perform: aString asKeyword not perform: aString asSymbol ? Regards! Bing Liang At 2017-02-11 15:51:49, "Sven Van Caekenberghe" <sven(a)stfx.eu> wrote: >Hi Bing, > >Yes, any character is allowed in a Symbol. There is even special syntax that allows such Symbols to be represented literally. > >'a b' asSymbol. > > => #'a b' > >Although it might be confusing, I don't see any problem. > >The concept of 'meaning' is defined by the user, the usage, not by the Symbol itself. A Symbol with a space cannot be a selector (message/method) name, but that does not mean a Symbol with a space could not be useful in some other context. > >Regards, > >Sven > >> On 11 Feb 2017, at 05:56, lb <liangbing64(a)126.com> wrote: >> >> Hi, >> I know Symbol is subclass of String. >> Any string object can become symbol object by sending 'asSymbol' message.. >> I think symbol must has its meaning in comon use, so the symbol should be composed of alphabet or number âwithout spaceâ. >> >> BUT There are not compliant below >> 1. ' ' asSymbol >>>> no meaning >> 2. '$%%&' asSymbol >>>> no meaning >> 3. 'sign' asSymbol = 'sign ' asSymbol >>> false because of space. >> 3. ' one two three ' asSymbol >>> I think It should become three symbols = #one, #two, #three >> >> >> Mybe my understanding is wrong. >> >> Bing Liang >> >> > >

Feb. 11, 2017

Re: [Pharo-users] About asSymbol message , some questions in my mind

by Sven Van Caekenberghe

Hi Bing, Yes, any character is allowed in a Symbol. There is even special syntax that allows such Symbols to be represented literally. 'a b' asSymbol. => #'a b' Although it might be confusing, I don't see any problem. The concept of 'meaning' is defined by the user, the usage, not by the Symbol itself. A Symbol with a space cannot be a selector (message/method) name, but that does not mean a Symbol with a space could not be useful in some other context. Regards, Sven > On 11 Feb 2017, at 05:56, lb <liangbing64(a)126.com> wrote: > > Hi, > I know Symbol is subclass of String. > Any string object can become symbol object by sending 'asSymbol' message.. > I think symbol must has its meaning in comon use, so the symbol should be composed of alphabet or number âwithout spaceâ. > > BUT There are not compliant below > 1. ' ' asSymbol >>>> no meaning > 2. '$%%&' asSymbol >>>> no meaning > 3. 'sign' asSymbol = 'sign ' asSymbol >>> false because of space. > 3. ' one two three ' asSymbol >>> I think It should become three symbols = #one, #two, #three > > > Mybe my understanding is wrong. > > Bing Liang > >

Feb. 11, 2017

Re: [Pharo-users] About asSymbol message , some questions in my mind

by Benoit St-Jean

It can be useful if you want to save some space in some very specific cases.Â You could have a one million strings 'hello' (hence one million objects) or deal transform them into symbols and have only one #hello.Â I recall a coworker telling me about this ultra-fast string search program in Gemstone where they transformed a gazillion duplicate strings into symbols thus using waaaaaaaay less memory and speeding up the lookup. Â ----------------- BenoÃ®t St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean Instagram: Chef_Benito IRC: lamneth Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero".Â (A. Einstein) From: lb <liangbing64(a)126.com> To: "pharo-users(a)lists.pharo.org" <pharo-users(a)lists.pharo.org> Sent: Friday, February 10, 2017 11:59 PM Subject: [Pharo-users] About asSymbol message , some questions in my mind Hi, I know Symbol is subclass of String.Â Â Â Â Â Â Â Â Any string object can become symbol object by sendingÂ 'asSymbol' message..I thinkÂ symbol must has its meaning in comon use, so the symbol should be composed of alphabet or number âwithout spaceâ. BUT There areÂ not compliant below1.Â Â 'Â Â Â Â ' asSymbolÂ Â Â Â >>>>Â Â Â no meaning2. Â '$%%&' asSymbolÂ Â Â Â >>>>Â Â Â no meaning3.Â 'sign' asSymbol = 'sign ' asSymbolÂ Â >>>Â false because of space.3. 'Â one two Â three ' asSymbolÂ Â Â Â Â Â Â Â Â Â Â Â Â Â >>>Â Â Â Â I think It should become three symbols = #one, #two, #three MaybeÂ my understanding isÂ wrong. Bing Liang

Feb. 11, 2017

About asSymbol message , some questions in my mind

by lb

Hi, I know Symbol is subclass of String. Any string object can become symbol object by sending 'asSymbol' message.. I think symbol must has its meaning in comon use, so the symbol should be composed of alphabet or number âwithout spaceâ. BUT There are not compliant below 1. ' ' asSymbol >>>> no meaning 2. '$%%&' asSymbol >>>> no meaning 3. 'sign' asSymbol = 'sign ' asSymbol >>> false because of space. 3. ' one two three ' asSymbol >>> I think It should become three symbols = #one, #two, #three Maybe my understanding is wrong. Bing Liang

Feb. 11, 2017

About asSymbol message , some questions in my mind

by lb

Hi, I know Symbol is subclass of String. Any string object can become symbol object by sending 'asSymbol' message.. I think symbol must has its meaning in comon use, so the symbol should be composed of alphabet or number âwithout spaceâ. BUT There are not compliant below 1. ' ' asSymbol >>>> no meaning 2. '$%%&' asSymbol >>>> no meaning 3. 'sign' asSymbol = 'sign ' asSymbol >>> false because of space. 3. ' one two three ' asSymbol >>> I think It should become three symbols = #one, #two, #three Mybe my understanding is wrong. Bing Liang

Feb. 11, 2017

Re: [Pharo-users] Unable to find the compiler

by Cyril Ferlicot D.

On 10/02/2017 23:58, Mark Neagu wrote: > Hi, > > I'm starting my first exrcise in Pharo Mooc. I just wrote the definition of MyCounter (picture 1) and had to compile it by selecting the accept menu item (picture 2). > Hi, You did a left click on what we call the "world" (the background of Pharo). To get the right menu you need to do a *right* click on the *code panel*. (See: https://puu.sh/tXu99/f11df69e74.png) But if you keep using Pharo you'll end up using the shortcut that is: CMD + S or CTRL + S depending on the OS :) > But I can't find any menu, so i can't compile MyCounter. > > Could you help me please? > > Regards, > Mark > -- Cyril Ferlicot http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

Feb. 10, 2017

Unable to find the compiler

by Mark Neagu

Hi, I'm starting my first exrcise in Pharo Mooc. I just wrote the definition of MyCounter (picture 1) and had to compile it by selecting the accept menu item (picture 2). But I can't find any menu, so i can't compile MyCounter. Could you help me please? Regards, Mark

Feb. 10, 2017

Re: [Pharo-users] Final rush for submitting GSOC proposal - Need your help

by Offray Vladimir Luna CÃ¡rdenas

Thanks Stephan, I have send the PR [1] to have Grafoscopio included in the GSoC proposals. Hopefully we will get accepted and we can leverage on the experience of learners already in the community, that are still students :-) (this is my last year as student in the PhD). [1] https://github.com/pharo-project/pharo-project-proposals/pull/34 Cheers, Offray On 10/02/17 15:21, stepharong wrote: > Let us if we get accepted and we address this problem. > I think that this is important to have "students" not just having to > learn pharo to get started. > >> Hi, >> >> As I said, I would like to work on Grafoscopio for the GSOC, but I >> lack a supervisor. I even can work on the proposal but I would need a >> supervisor to help me with the GTTools-Spec related issues and >> improving test coverage and code quality where needed. Is possible to >> create a project in this "reverse" way (from a candidate looking for >> a supervisor)? If yes, any supervisor would be interested? Any other >> suggested route to get Grafoscopio in the Summer of code? >> >> Thanks, >> >> Offray >> >> >> On 09/02/17 11:05, Serge Stinckwich wrote: >>> Hi all, >>> >>> we are currently working with Alexandre to submit the gsoc proposal >>> to Google. >>> I was a little bit busy with my lectures and I didn't check the >>> current proposals available here: >>> >>> http://gsoc.pharo.org/ >>> >>> but all the projects are coming from RMOD team, but having all the >>> projects proposal coming from the same place might be perceived >>> negatively from Google. Can we add more projects from previous gsoc >>> form other people also ? >>> >>> We have only one hour to polish the list. >>> Thank you for your help. >>> >> >> > >

Feb. 10, 2017

Re: [Pharo-users] Final rush for submitting GSOC proposal - Need your help

by Offray Vladimir Luna CÃ¡rdenas

Hi, On 10/02/17 05:45, Serge Stinckwich wrote: > On Fri, Feb 10, 2017 at 12:48 AM, Offray Vladimir Luna CÃ¡rdenas > <offray.luna(a)mutabit.com> wrote: >> Excellent! I will create the proposal to have it ready for tomorrow. > Great, tell me when this ready. It is. See at: https://github.com/pharo-project/pharo-project-proposals/pull/34 >> Jupyter support could be nice, but I would think is some kind of ZeroMQ >> support really. That would enable multiple kernels inside Pharo with the >> advantages of live coding, powerful inspectors and debuggers, not present in >> the Jupyter notebook interface. Hydrogen[1] and nteract[2][3] are taking >> this route of enabling Jupyter kernels inside desktop apps with results far >> more interesting that what is possible on the web interface. > I think there is a ZeroMQ implementation in Pharo ? > In order to built a Pharo kernel we have two solutions: built > something in Python that run Pharo from command-line or > implement a kernel in Pharo. The 1st solution will allows you to have > a working solution very fast, but I will prefer the other solution ;-) Yes I would prefer the second one via ZeroMQ and Pharo. In that way you could use the same technology that Jupyter and nteract are using to enable several programming language kernels talking with the notebook. I think that the notebook we can create inside Pharo is far superior that the existing ones in terms of UI, inspectors, visuals and live coding. > >> [1] https://github.com/nteract/hydrogen >> [2] https://nteract.io/ >> [3] https://github.com/nteract/nteract > Yes I know about these tools. I think we need to have first a basic > support for Pharo and we can have something more live after that. > and maybe use Grafoscopio as an interface ;-) > > Regards, Yes, using Grafoscopio as and interface for literate computing and reproducible research, native to Pharo and talking with several external languages would be a dream come true :-). Cheers, Offray

Feb. 10, 2017

Re: [Pharo-users] Final rush for submitting GSOC proposal - Need your help

by stepharong

Let us if we get accepted and we address this problem. I think that this is important to have "students" not just having to learn pharo to get started. > Hi, > > As I said, I would like to work on Grafoscopio for the GSOC, but I lack > a supervisor. I even can work on the proposal but I would need a > supervisor to help me with the GTTools-Spec related issues and improving > test coverage and code quality where needed. Is possible to create a > project in this "reverse" way (from a candidate looking for a > supervisor)? If yes, any supervisor would be interested? Any other > suggested route to get Grafoscopio in the Summer of code? > > Thanks, > > Offray > > > On 09/02/17 11:05, Serge Stinckwich wrote: >> Hi all, >> >> we are currently working with Alexandre to submit the gsoc proposal to >> Google. >> I was a little bit busy with my lectures and I didn't check the >> current proposals available here: >> >> http://gsoc.pharo.org/ >> >> but all the projects are coming from RMOD team, but having all the >> projects proposal coming from the same place might be perceived >> negatively from Google. Can we add more projects from previous gsoc >> form other people also ? >> >> We have only one hour to polish the list. >> Thank you for your help. >> > > -- Using Opera's mail client: http://www.opera.com/mail/

Feb. 10, 2017