[Newbies] Re: FileDirectory

[Joseph Alotta]

okay, thank you.  And thank you for the wikipedia article.

sincerely,

Joe.

  
> On May 31, 2016, at 3:27 PM, Ron Teitelbaum [via Smalltalk] <ml-node+s1294792n4898441h20 at n4.nabble.com> wrote:
> 
> Hi Joe,
> 
>  
> 
> There are a number of different types of resource names.  One of them is a URI the other is URL (I=Indenter L=Locator).  They are ways for locating and identifying resources so that computers can find and work with them.  I would recommend googling a bit about URI and URL to understand better what they are used for.  The section I pointed out was a method that gave you the protocol (scheme) for the URL.  
> 
>  
> 
> URL class >> urlClassForScheme: scheme
> 
>                (scheme isNil or: [scheme = 'http']) ifTrue: [^HttpUrl].
> 
>                scheme = 'https' ifTrue: [^HttpUrl].
> 
>                scheme = 'ftp' ifTrue: [^FtpUrl].
> 
>                scheme = 'file' ifTrue: [^FileUrl].
> 
>                scheme = 'mailto' ifTrue: [^MailtoUrl].
> 
>                scheme = 'browser' ifTrue: [^BrowserUrl].
> 
>                ^GenericUrl
> 
>  
> 
> This is a class side method that returns the class you should use to work with the resource.  You asked why there were url methods on FileDirectory.  The answer is that a url instead of starting with http  as in http://mydomain.com/somefilename  can start with file:// as in file://somefilename and this is how we get to FileDirectory (well eventually through FileUrl), that’s what I was trying to point out.
> 
>  
> 
> All the best,
> 
>  
> 
> Ron
> 
>  
> 
>  
> 
>  
> 
> From: [hidden email] [mailto:[hidden email]] On Behalf Of Joseph Alotta
> Sent: Tuesday, May 31, 2016 2:16 PM
> To: [hidden email]
> Subject: [Newbies] Re: FileDirectory
> 
>  
> 
> 
> 
> > On May 26, 2016, at 5:50 PM, Ron Teitelbaum [via Smalltalk] <[hidden email]> wrote: 
> > 
> > Have a look at the Hierarchy for the class Url 
> > 
> >   
> > 
> > Notice the class method: #urlClassForScheme: 
> > 
> >   
> > 
> > That should give you a better understanding of why url methods are in FileDirectory. 
> > 
> >   
> > 
> > For browser like methods see HTTPClient. 
> 
> 
> 
> Sorry, Ron, all I got from this email after a day of trying to understand it, is that I do not have the background to grasp what you are trying to tell me.  It seems you need to know all of this already before you know how to use it. 
> 
> I thought the purpose of encapsulation is that you do not need to know the inner workings of an object to use it. 
> 
> Is there something more basic about urls and httpclients that I can start with? 
> 
> Sincerely, 
> 
> Joe. 
> 
> 
> 
> View this message in context: Re: FileDirectory
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