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Re: [Pharo-users] Stateful traits in Pharo?

by Simon Denier

Hi Johan There have been some discussion on the subject a few months ago - more or less what Stef describes. I am soon over with all my job application duties, so I would be happy to participate. On 19 mai 2010, at 22:17, Johan Fabry wrote: > > Sorry Stef, you are being too terse. :-( Please expand a bit for me to be able to understand. > > On 19 May 2010, at 14:17, StÃ©phane Ducasse wrote: > >>> If so, where can I get it, and is it stable ? >> >> no >> >> It would be better to hack something different like >> traits can have state >> traits instance var -> class instanace var >> when there is a conflict we change manually or we do an automated prefix _ and __ > > -- > Johan Fabry > jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry > PLEIAD Lab - Computer Science Department (DCC) - University of Chile > > > > > _______________________________________________ > Pharo-users mailing list > Pharo-users(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-users -- Simon

May 19, 2010

Re: [Pharo-users] Stateful traits in Pharo?

by Johan Fabry

Sorry Stef, you are being too terse. :-( Please expand a bit for me to be able to understand. On 19 May 2010, at 14:17, StÃ©phane Ducasse wrote: >> If so, where can I get it, and is it stable ? > > no > > It would be better to hack something different like > traits can have state > traits instance var -> class instanace var > when there is a conflict we change manually or we do an automated prefix _ and __ -- Johan Fabry jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry PLEIAD Lab - Computer Science Department (DCC) - University of Chile

May 19, 2010

Re: [Pharo-users] Stateful traits in Pharo?

by StÃ©phane Ducasse

On May 19, 2010, at 8:01 PM, Johan Fabry wrote: > Hi all, > > I was wondering if there is an implementation of stateful traits that works in Pharo. somehow > If so, where can I get it, and is it stable ? no It would be better to hack something different like traits can have state traits instance var -> class instanace var when there is a conflict we change manually or we do an automated prefix _ and __ Stef > > -- > Johan Fabry > jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry > PLEIAD Lab - Computer Science Department (DCC) - University of Chile > > > > > _______________________________________________ > Pharo-users mailing list > Pharo-users(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-users

May 19, 2010

Stateful traits in Pharo?

by Johan Fabry

Hi all, I was wondering if there is an implementation of stateful traits that works in Pharo. If so, where can I get it, and is it stable ? -- Johan Fabry jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry PLEIAD Lab - Computer Science Department (DCC) - University of Chile

May 19, 2010

Re: [Pharo-users] Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?

by RickT

Thanks for the great response! I am not only a newbie to Smalltalk but also to any sort of network programming. I guess my exposure to 'ping' on other systems was always the ICMP flavor; so I was surprised by this implementation. As Mariano pointed out, the source code in Pharo1.0 indicates port 7: tcpPort := 7. "7 = echo port, 13 = time port, 19 = character generator port" It seems to me that a ping: method should be the ICMP kind, and a ping:port: method should be for the TCP variety. I presume an echo server could be run on ports other than 7 or 10, depending on preference. So maybe the port should be designated by the caller, and not hard-coded into the class method. I see the other reasoning from your response. Thanks again for clarifying this (and educating me). -- View this message in context: http://forum.world.st/Newbie-Does-Socket-ping-addr-work-in-Pharo3-11-8-tp22… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

May 17, 2010

Re: [Pharo-users] Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?

by Douglas Brebner

On 17/05/2010 13:44, Mariano Martinez Peck wrote: > > > On Mon, May 17, 2010 at 2:18 PM, Douglas Brebner > <squeaklists(a)fang.demon.co.uk <mailto:squeaklists@fang.demon.co.uk>> > wrote: > > On 16/05/2010 17:36, RickT wrote: >> I still cannot get Socket>>ping: to work; it always times out. >> >> And yes, I meant the OS command window ping worked. For Windows XP it is >> what you would call the DOS command line. I also downloaded and tried the >> Pharo1.0 in my VirtualBox VM running Ubuntu. I have the same problem: I >> can ping localhost from the Linux command line, but Pharo 1.0 ping always >> times out. >> >> (I am running on a Dell M90 Precision laptop. FWIW) >> >> > > The problem is that the Socket>>#ping: does not do the same thing > as the command line utilities. > > The DOS and Unix ping utilities send an *ICMP* echo request packet > and expects an echo response. This is normally handled by the > protocol stack itself. > > The Pharo #ping: method makes a *TCP* connection to port 10 (echo > service) on the destination machine. If there's no server > listening on that port, the connection will fail. > > > Thanks for the explanation :) > > Now...isn't it 7 by default ? > > So you can try the method #pingPortsOn: hostName > > which does: > > pingPortsOn: hostName > "Attempt to connect to a set of well-known sockets on the given > host, and answer the names of the available ports." > "Socket pingPortsOn: 'www.disney.com <http://www.disney.com>'" > > ^ Socket > pingPorts: #(7 13 19 21 23 25 80 110 119) > on: hostName > timeOutSecs: 20 > > > ;) > > I believe some intrusion detection software would identify that as a hostile scan looking for vulnerabilities :) The best thing would be to change #ping: to use ICMP but iirc that requires a raw socket and thus root permission under unix. Alas.

May 17, 2010

Re: [Pharo-users] Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?

by Mariano Martinez Peck

On Mon, May 17, 2010 at 2:18 PM, Douglas Brebner < squeaklists(a)fang.demon.co.uk> wrote: > On 16/05/2010 17:36, RickT wrote: > > I still cannot get Socket>>ping: to work; it always times out. > > And yes, I meant the OS command window ping worked. For Windows XP it is > what you would call the DOS command line. I also downloaded and tried the > Pharo1.0 in my VirtualBox VM running Ubuntu. I have the same problem: I > can ping localhost from the Linux command line, but Pharo 1.0 ping always > times out. > > (I am running on a Dell M90 Precision laptop. FWIW) > > > > > The problem is that the Socket>>#ping: does not do the same thing as the > command line utilities. > > The DOS and Unix ping utilities send an *ICMP* echo request packet and > expects an echo response. This is normally handled by the protocol stack > itself. > > The Pharo #ping: method makes a *TCP* connection to port 10 (echo service) > on the destination machine. If there's no server listening on that port, the > connection will fail. > Thanks for the explanation :) Now...isn't it 7 by default ? So you can try the method #pingPortsOn: hostName which does: pingPortsOn: hostName "Attempt to connect to a set of well-known sockets on the given host, and answer the names of the available ports." "Socket pingPortsOn: 'www.disney.com'" ^ Socket pingPorts: #(7 13 19 21 23 25 80 110 119) on: hostName timeOutSecs: 20 ;) Mariano > > Here's the method comment, emphasis added > > "Ping the given host. Useful for checking network connectivity. *The host > must be running a TCP echo server*." > > _______________________________________________ > Pharo-users mailing list > Pharo-users(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-users > >

May 17, 2010

Re: [Pharo-users] Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?

by StÃ©phane Ducasse

Thanks douglas. Stef On May 17, 2010, at 2:18 PM, Douglas Brebner wrote: > On 16/05/2010 17:36, RickT wrote: >> I still cannot get Socket>>ping: to work; it always times out. >> >> And yes, I meant the OS command window ping worked. For Windows XP it is >> what you would call the DOS command line. I also downloaded and tried the >> Pharo1.0 in my VirtualBox VM running Ubuntu. I have the same problem: I >> can ping localhost from the Linux command line, but Pharo 1.0 ping always >> times out. >> >> (I am running on a Dell M90 Precision laptop. FWIW) >> >> >> > > The problem is that the Socket>>#ping: does not do the same thing as the command line utilities. > > The DOS and Unix ping utilities send an ICMP echo request packet and expects an echo response. This is normally handled by the protocol stack itself. > > The Pharo #ping: method makes a TCP connection to port 10 (echo service) on the destination machine. If there's no server listening on that port, the connection will fail. > > Here's the method comment, emphasis added > "Ping the given host. Useful for checking network connectivity. The host must be running a TCP echo server." > _______________________________________________ > Pharo-users mailing list > Pharo-users(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-users

May 17, 2010

Re: [Pharo-users] Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?

by Douglas Brebner

On 16/05/2010 17:36, RickT wrote: > I still cannot get Socket>>ping: to work; it always times out. > > And yes, I meant the OS command window ping worked. For Windows XP it is > what you would call the DOS command line. I also downloaded and tried the > Pharo1.0 in my VirtualBox VM running Ubuntu. I have the same problem: I > can ping localhost from the Linux command line, but Pharo 1.0 ping always > times out. > > (I am running on a Dell M90 Precision laptop. FWIW) > > The problem is that the Socket>>#ping: does not do the same thing as the command line utilities. The DOS and Unix ping utilities send an *ICMP* echo request packet and expects an echo response. This is normally handled by the protocol stack itself. The Pharo #ping: method makes a *TCP* connection to port 10 (echo service) on the destination machine. If there's no server listening on that port, the connection will fail. Here's the method comment, emphasis added "Ping the given host. Useful for checking network connectivity. *The host must be running a TCP echo server*."

May 17, 2010

Accentuate Characters

by Adrien BARREAU

Hello, I want to compose accentuate character in Pharo, but I don't know how I can do that. I saw in Visual Works I can write this kind of things : $e composeDiacritical: (Character diacriticalNamed: #acute). That returns $Ã©. But, I don't find a way to do that in Pharo. Does somebody have an idea ? :) A.B. _________________________________________________________________ Vous voulez regarder la TV directement depuis votre PC ? C'est trÃ¨s simple avec Windows 7 http://clk.atdmt.com/FRM/go/229960614/direct/01/

May 17, 2010