Re: [Newbies] troubleshooting question
Perhaps you could describe what you actually want to achieve. Squeak is different from other programming environments. Some things are much easier, some are much harder than in other systems. In a way, Squeak pretends to be its own operation system (it indeed can run on bare hardware). That makes it harder to do a "hello world" that writes to the "other" operating system's stdout. Other things, like animated graphics or sound are much easier in Squeak than elsewhere. The Squeak "hello world" is simple to show that string on the Transcript. Or even better self inform: 'hello world' Note that working with Squeak is much more immediate than you might be used to. For example, you should just select "OSProcess thisOSProcess stdOut" and press Cmd-p to see the result, rather than logging it to the Transcript. Or, press Cmd-i to inspect it. You should learn to use the debugger - read what it actually says, and explore. For example, "UndefinedObject does not understand: #nextPutAll:" simply means you sent the message "nextPutAll:" to nil (an instance of class UndefinedObject), which cannot understand that message, and says so. Same thing with a "self halt": you do not get an error, the reddish window simply is a friendly debugger to examine the code about to be executed. - Bert - Am 20.07.2006 um 20:03 schrieb Thomas Keller: Perhaps this is the problem? When I ran this in a worksheet: a _ OSProcess thisOSProcess stdOut. Transcript show: a show: returned "nil" So nextPutAll: has no where to print to? So my next question is how do I find the systems STDOUT pid? Thanks, Tom K On 7/19/06, David T. Lewis <[EMAIL PROTECTED]> wrote: On Tue, Jul 18, 2006 at 11:19:56AM -0700, Thomas J Keller wrote: > Greetings, > I copied this simple example from the Beginners page: > OSProcess thisOSProcess stdOut nextPutAll: 'Hello World' > > Before running it, I did install the OSProcess OSProcess Pluggin > packages. > > But I get an MessageNotUnderstood error browser. But I can't seem to > figure out why stdOut is not understanding nextPutAll: Hi Tom, OSProcess does not work on all platforms. If you are using Linux (or Mac OS/X with the less common Unix VM), the example should work. But if you are using Windows, it would not work unless you build your own custom VM and plugins (not what you had in mind, I'm sure). Almost everything in Squeak works identically on all platforms, but OSProcess is an exception to this rule. It is intended to provide platform-specific extensions, and it works differently (or not at all) on different platforms. As for troubleshooting, try playing around with the Squeak debugger. When you saw the "MessageNotUnderstood browser", you were seeing the debugger. Open in up and explore a little, and you'll be able learn a lot about problems like this one. You can also open a debugger right away and use it to step slowly through a problem to see where it goes wrong. For you example, try evaluating this in your workspace: self halt. OSProcess thisOSProcess stdOut nextPutAll: 'hello world' Hope this helps a little, Dave ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] troubleshooting question
Perhaps this is the problem?When I ran this in a worksheet:a _ OSProcess thisOSProcess stdOut.Transcript show: a show: returned "nil"So nextPutAll: has no where to print to?So my next question is how do I find the systems STDOUT pid? Thanks,Tom KOn 7/19/06, David T. Lewis <[EMAIL PROTECTED]> wrote: On Tue, Jul 18, 2006 at 11:19:56AM -0700, Thomas J Keller wrote:> Greetings,> I copied this simple example from the Beginners page:> OSProcess thisOSProcess stdOut nextPutAll: 'Hello World'> > Before running it, I did install the OSProcess OSProcess Pluggin> packages.>> But I get an MessageNotUnderstood error browser. But I can't seem to> figure out why stdOut is not understanding nextPutAll: Hi Tom,OSProcess does not work on all platforms. If you are using Linux (orMac OS/X with the less common Unix VM), the example should work. Butif you are using Windows, it would not work unless you build your own custom VM and plugins (not what you had in mind, I'm sure).Almost everything in Squeak works identically on all platforms, butOSProcess is an exception to this rule. It is intended to provideplatform-specific extensions, and it works differently (or not at all) on different platforms.As for troubleshooting, try playing around with the Squeak debugger.When you saw the "MessageNotUnderstood browser", you were seeingthe debugger. Open in up and explore a little, and you'll be able learn a lot about problems like this one. You can also open a debuggerright away and use it to step slowly through a problem to see whereit goes wrong. For you example, try evaluating this in your workspace: self halt. OSProcess thisOSProcess stdOut nextPutAll: 'hello world'Hope this helps a little,Dave___Beginners mailing list Beginners@lists.squeakfoundation.orghttp://lists.squeakfoundation.org/mailman/listinfo/beginners -- Tom"Ecrasez l'Infame!" -- Voltaire ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
Re: [Newbies] troubleshooting question
Still confused.I'm running Squeak3.8-6665 on OS X v10.4. The debugger indicates nextPutAll: 'hello world' is the problem. But nextPutAll: should take a string as its argument.self halt also gives an error, with halt as an undefined object. sigh.Tom KOn 7/18/06, Thomas J Keller <[EMAIL PROTECTED]> wrote: Greetings,I copied this simple example from the Beginners page:OSProcess thisOSProcess stdOut nextPutAll: 'Hello World' Before running it, I did install the OSProcess OSProcess Pluggin packages. But I get an MessageNotUnderstood error browser. But I can't seem to figure out why stdOut is not understanding nextPutAll:Thanks for help. Tom Keller, Ph.D. [EMAIL PROTECTED] 503-494-24426339b Basic Science Bldg http://www.ohsu.edu/research/core ___Beginners mailing listBeginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners -- Tom"Ecrasez l'Infame!" -- Voltaire ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
[Newbies] My favourite strange expression [was: Challenge]
On Thu, 13 Jul 2006 12:39:53 +0200, Bert Freudenberg wrote: Heh. My favourite strange expression is this: # "hi there" :== '_' 1) Who can guess what the result is WITHOUT trying it? 2) Who can explain what's happening? 3) Do we need to fix it? - Bert - Found another one (relative to #7042): | philosopher mathematicians | mathematicians := 2. philosopher := philosopher == mathematicians. OrderedCollection new addLast: philosopher; removeLast: mathematicians; size Questions 1-3 from Bert applicable to *both* issues ;-) /Klaus ___ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners