From faber at linuxnj.com  Sun Apr 16 19:02:24 2006
From: faber at linuxnj.com (Faber Fedor)
Date: Sun, 16 Apr 2006 22:02:24 -0400
Subject: [ABE.pm] Ruby Q
Message-ID: <20060417020224.GA22840@neptune.faber.nom>

(Yes, that's Creedence you hear in the background.)

I finally started playing with Ruby.  So far, so good.  However, in my
readings, there's one important (IMO) thing I haven't come across: what
is Ruby's equivalent to Perl's "my" declaration?  

I *really* hate creating variables by mistyping.


-- 
 
Regards,
 
Faber Fedor
President
Linux New Jersey, Inc.
908-320-0357
800-706-0701

http://www.linuxnj.com




From rjbs-perl-abe at lists.manxome.org  Sun Apr 16 19:11:00 2006
From: rjbs-perl-abe at lists.manxome.org (Ricardo SIGNES)
Date: Sun, 16 Apr 2006 22:11:00 -0400
Subject: [ABE.pm] Ruby Q
In-Reply-To: <20060417020224.GA22840@neptune.faber.nom>
References: <20060417020224.GA22840@neptune.faber.nom>
Message-ID: <20060417021100.GR17788@manxome.org>

* Faber Fedor <faber at linuxnj.com> [2006-04-16T22:02:24]
> I finally started playing with Ruby.  So far, so good.  However, in my
> readings, there's one important (IMO) thing I haven't come across: what
> is Ruby's equivalent to Perl's "my" declaration?  
> 
> I *really* hate creating variables by mistyping.

Tough luck.  Ruby's variables are created by assignment.  Using a symbol as
an rvalue in an expression before it's been assigned a value throws a
NameError, just like Python.  Ruby's scoping is more sane than Python's, but
you can still shoot your foot more easily than in Perl, with regard to
undeclared variables and typos.

I'm with you: it's one of the few places where, as a language, Perl 5 beats
Ruby.

-- 
rjbs
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From faber at linuxnj.com  Mon Apr 17 14:00:49 2006
From: faber at linuxnj.com (Faber Fedor)
Date: Mon, 17 Apr 2006 17:00:49 -0400
Subject: [ABE.pm] Ruby Q
In-Reply-To: <20060417021100.GR17788@manxome.org>
References: <20060417020224.GA22840@neptune.faber.nom>
	<20060417021100.GR17788@manxome.org>
Message-ID: <20060417210049.GC24706@neptune.faber.nom>

On 16/04/06 22:11 -0400, Ricardo SIGNES wrote:
> * Faber Fedor <faber at linuxnj.com> [2006-04-16T22:02:24]
> > I finally started playing with Ruby.  So far, so good.  However, in my
> > readings, there's one important (IMO) thing I haven't come across: what
> > is Ruby's equivalent to Perl's "my" declaration?  
> > 
> > I *really* hate creating variables by mistyping.
> 
> Tough luck.  Ruby's variables are created by assignment.  Using a symbol as
> an rvalue in an expression before it's been assigned a value throws a
> NameError, just like Python.  

That I can live with.  It's the unintended lvalues that I don't want.

> Ruby's scoping is more sane than Python's, but
> you can still shoot your foot more easily than in Perl, 

Hmm, I assumed the scoping would be Perl-like.  I'd better read up on
that.

-- 
 
Regards,
 
Faber Fedor
President
Linux New Jersey, Inc.
908-320-0357
800-706-0701

http://www.linuxnj.com




From rjbs-perl-abe at lists.manxome.org  Mon Apr 17 14:20:52 2006
From: rjbs-perl-abe at lists.manxome.org (Ricardo SIGNES)
Date: Mon, 17 Apr 2006 17:20:52 -0400
Subject: [ABE.pm] Ruby Q
In-Reply-To: <20060417210049.GC24706@neptune.faber.nom>
References: <20060417020224.GA22840@neptune.faber.nom>
	<20060417021100.GR17788@manxome.org>
	<20060417210049.GC24706@neptune.faber.nom>
Message-ID: <20060417212052.GA3919@manxome.org>

* Faber Fedor <faber at linuxnj.com> [2006-04-17T17:00:49]
> On 16/04/06 22:11 -0400, Ricardo SIGNES wrote:
> > Ruby's scoping is more sane than Python's, but
> > you can still shoot your foot more easily than in Perl, 
> 
> Hmm, I assumed the scoping would be Perl-like.  I'd better read up on
> that.

The unPerl-like-ness-itude of it is that "a variable's scope begins at the
point where its symbol is assigned to" rather than "a variable's scope begins
when it is declared to begin."

-- 
rjbs
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From faber at linuxnj.com  Tue Apr 18 19:44:38 2006
From: faber at linuxnj.com (Faber Fedor)
Date: Tue, 18 Apr 2006 22:44:38 -0400
Subject: [ABE.pm] Ruby Q
In-Reply-To: <20060417212052.GA3919@manxome.org>
References: <20060417020224.GA22840@neptune.faber.nom>
	<20060417021100.GR17788@manxome.org>
	<20060417210049.GC24706@neptune.faber.nom>
	<20060417212052.GA3919@manxome.org>
Message-ID: <20060419024438.GA28791@neptune.faber.nom>

On 17/04/06 17:20 -0400, Ricardo SIGNES wrote:
> * Faber Fedor <faber at linuxnj.com> [2006-04-17T17:00:49]
> > On 16/04/06 22:11 -0400, Ricardo SIGNES wrote:
> > > Ruby's scoping is more sane than Python's, but
> > > you can still shoot your foot more easily than in Perl, 
> > 
> > Hmm, I assumed the scoping would be Perl-like.  I'd better read up on
> > that.
> 
> The unPerl-like-ness-itude of it is that "a variable's scope begins at the
> point where its symbol is assigned to" rather than "a variable's scope begins
> when it is declared to begin."

Well, that makes sense if you can't declare the variable, i.e. the
variable is declared once it is assigned.  What am I missing?

-- 
 
Regards,
 
Faber Fedor
President
Linux New Jersey, Inc.
908-320-0357
800-706-0701

http://www.linuxnj.com




From rjbs-perl-abe at lists.manxome.org  Tue Apr 18 20:05:34 2006
From: rjbs-perl-abe at lists.manxome.org (Ricardo SIGNES)
Date: Tue, 18 Apr 2006 23:05:34 -0400
Subject: [ABE.pm] Ruby Q
In-Reply-To: <20060419024438.GA28791@neptune.faber.nom>
References: <20060417020224.GA22840@neptune.faber.nom>
	<20060417021100.GR17788@manxome.org>
	<20060417210049.GC24706@neptune.faber.nom>
	<20060417212052.GA3919@manxome.org>
	<20060419024438.GA28791@neptune.faber.nom>
Message-ID: <20060419030534.GA20576@manxome.org>

* Faber Fedor <faber at linuxnj.com> [2006-04-18T22:44:38]
> > The unPerl-like-ness-itude of it is that "a variable's scope begins at the
> > point where its symbol is assigned to" rather than "a variable's scope
> > begins when it is declared to begin."
> 
> Well, that makes sense if you can't declare the variable, i.e. the
> variable is declared once it is assigned.  What am I missing?

  scratchpad_value = 10 # default starting
  user_input.each {
    |datum|
    analysis = MegaWidget.analyze_datum(datum)
    summary  = Reporter.crunch_numbers(analysis)
    scratchpad_valuw = Reporter.average_in(summary, scratchpad_value)
  }

  puts "the final output is #{scratchpad_value}"

In Perl, you would have put "my" in front of only the first assignment to
scratchpad_value, so the assignment to scratchpad_valuw would have been a
compile-time error.  In Ruby, its assignment declares it, but is pointless.
The final output is always 10 and no exception is raised.

-- 
rjbs
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From rjbs-perl-abe at lists.manxome.org  Thu Apr 27 08:09:05 2006
From: rjbs-perl-abe at lists.manxome.org (Ricardo SIGNES)
Date: Thu, 27 Apr 2006 11:09:05 -0400
Subject: [ABE.pm] good grief, we need beer
Message-ID: <20060427150904.GQ30945@zodiac.codesimply.com>

Mongers:

I should really try to settle some regular period for beer meetings.  If nobody
could make it, I'd still get beer.  If people could make it, I'd get beer with
cool people.  Yup, beer sounds like a good plan.

I will be drinking beer (and eating dinner) next Wednesday, May 3rd, at J.P.
McGrady's, around 18:30.  John will be there, too, in case you don't like me.
I will look forward to talking about Perl, Ruby, Linux, and other stuff.

Faber, if you feel like coming, I might ask you questions about business...
stuff.

ALSO!  I'm going to be giving a talk on one of my favorite new projects at YAPC
this year.  (Anybody else going to go?  It's cheap!)  It'd be great if I could
get some of you guys to let me practice it between now and YAPC.

See you then?

-- 
rjbs
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From faber at linuxnj.com  Thu Apr 27 08:27:08 2006
From: faber at linuxnj.com (Faber Fedor)
Date: Thu, 27 Apr 2006 11:27:08 -0400
Subject: [ABE.pm] good grief, we need beer
In-Reply-To: <20060427150904.GQ30945@zodiac.codesimply.com>
References: <20060427150904.GQ30945@zodiac.codesimply.com>
Message-ID: <20060427152708.GA19657@neptune.faber.nom>

On 27/04/06 11:09 -0400, Ricardo SIGNES wrote:
> Mongers:
> 
> I should really try to settle some regular period for beer meetings.  If nobody
> could make it, I'd still get beer.  If people could make it, I'd get beer with
> cool people.  Yup, beer sounds like a good plan.
> 
> I will be drinking beer (and eating dinner) next Wednesday, May 3rd, at J.P.
> McGrady's, around 18:30.  John will be there, too, in case you don't like me.
> I will look forward to talking about Perl, Ruby, Linux, and other stuff.
> 
> Faber, if you feel like coming, I might ask you questions about business...
> stuff.

First Wednesday of the month looks good for me.  This is the same place
we were at before?


> ALSO!  I'm going to be giving a talk on one of my favorite new projects at YAPC
> this year.  (Anybody else going to go?  It's cheap!)  

When and where?

> It'd be great if I could
> get some of you guys to let me practice it between now and YAPC.

Can't you get those LVLUGers to let you talk?



-- 
 
Regards,
 
Faber Fedor
President
Linux New Jersey, Inc.
908-320-0357
800-706-0701

http://www.linuxnj.com




From rjbs-perl-abe at lists.manxome.org  Thu Apr 27 08:31:06 2006
From: rjbs-perl-abe at lists.manxome.org (Ricardo SIGNES)
Date: Thu, 27 Apr 2006 11:31:06 -0400
Subject: [ABE.pm] good grief, we need beer
In-Reply-To: <20060427152708.GA19657@neptune.faber.nom>
References: <20060427150904.GQ30945@zodiac.codesimply.com>
	<20060427152708.GA19657@neptune.faber.nom>
Message-ID: <20060427153106.GR30945@zodiac.codesimply.com>

* Faber Fedor <faber at linuxnj.com> [2006-04-27T11:27:08]
> > I will be drinking beer (and eating dinner) next Wednesday, May 3rd, at
> > J.P.  McGrady's, around 18:30.  John will be there, too, in case you don't
> > like me.
> 
> First Wednesday of the month looks good for me.  This is the same place
> we were at before?

Yes!  Mmm.  Beer, burgers, wings.


> > ALSO!  I'm going to be giving a talk on one of my favorite new projects at
> > YAPC this year.  (Anybody else going to go?  It's cheap!)  
> 
> When and where?

http://yapcchicago.org

It's in (duh) Chicago, June 26-28.  Registration is $85.  The cheap on-site
lodging is about $100/night.  This looks like one of the best YAPCs in years,
so I'm excited.

> > It'd be great if I could
> > get some of you guys to let me practice it between now and YAPC.
> 
> Can't you get those LVLUGers to let you talk?

I can, and I might try for both... but the code I'm presenting on is fairly
non-beginner-friendly.

-- 
rjbs
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