vasudevram said:
Hi,
I'm sticking my neck out here a bit, since I'm relatively new to Ruby,
but gonna do it anyway ... :0) [I do have a good amount of experience
in other languages like Java, C, Python]. More knowledgeable Rubyists,
feel free to flame away at what I say below
I know I'll learn
something from it anyway.
Not so much flames as challenges ...
Reason 0: First of all, its not necessarily a matter of preferring Ruby
*over* Python. Its not an either-or situation at all - unless you want
to make it one. Its quite possible to learn and work with more than one
language at the same time, or at least in a staggered/parallel manner.
Many top developers are of the view that learning and using more than
one language is beneficial, helps you grow as a programmer.
I have found that switching languages rapidly, frequently, even in a
"staggered/parallel" manner is for the most part counter-productive.
Programming in *any* language is an activity that requires a mix of
intense focus on the programming tasks *and* an intensely active
communication in a spoken human language with customers and colleagues.
Add multiple programming languages and you lose focus.
Occasionally a project will need multiple languages. I've found those go
slower and are more difficult than projects where you can wallow in your
knowledge of a single language and a single application domain. I pity a
programmer who has to write a Ruby - FORTRAN bridge that is called by a
Java ERP application for an engineering firm located in Quebec.
Yes, indeed, learning multiple languages does help you grow, provided
they aren't too similar. There's a note about that on someone's blog --
give me a day or so and I can track it down. But briefly, he claimed --
and I somewhat agree -- that there are two broad classes of language.
There's the "Algol Family", into which class C/C++, Java, Python, Ruby,
Perl, etc. fall, and there's the "Lisp Family". If you're like most of
us, you spend most of your time in the Algol family. His point was that
you grow more if you learn a Lisp family language than if you learn
another Algol family language.
Incidentally, where I disagree is that I think there are six families:
1. Macro assemblers
2. Algol
3. Lisp
4. APL
5. Forth
6. Smalltalk
One of the things that's attractive to me about Ruby is that it contains
features from most of the six. I haven't found much of APL or Forth, but
there are clearly influences from Algol, Lisp, Smalltalk and macro
assembler.
Reason 1: Ruby is more object-oriented than Python.
Well ... Ruby objects were there from day one, and they resemble
"classical" object concepts like those in Smalltalk, C++ and Java, but I
don't think *today's* Python is "less object-oriented" than *today's*
Ruby, nor do I think Ruby is "more object-oriented" than R, Lisp or Scheme.
Reason 2: The Principle of Least Surprise. You can, to a good extent,
almost figure out how parts of the language / syntax work, after you've
learnt a bit of it. Read the Pickaxe and other Ruby books and the docs
to see more on what this means.
I've been writing some Ruby code and can attest to it.
I haven't found Ruby code all that obvious to a newcomer. I've been
programming a long time, and I have a programming style that evolved
from macro assembler to FORTRAN to Perl to R, with influences from Lisp,
FORTH and Java.
Part of it is that I'm very much more familiar and comfortable with
functional programming than I am with object-oriented programming. In my
younger days, I was actually one of those people who went around on long
tirades declaiming that Functional Programming was the one true way.
I thought pure functional languages had a lot going for them. I still do.
I spent about three hours last night trying to understand Hal Fulton's
well-crafted example of metaprogramming that reads CSV files. I know it
will make sense to me eventually, but it didn't after three hours. I
know it's "good code", I know it's "elegant code", I know it's an
example of the wonders of Ruby, and I know it works. But I still don't
know why.
Reason 3: No indentation rules like in Python. Just open the logical
construct like if or while with its corresponding keyword ("if" /
"while"), close it with "end". Though I'm an experienced developer and
a very good typist, Python's syntax rules recently almost drove me mad,
trying to track down an elusive bug that was related to indentation.
The rules of indentation themselves are straightforward enough. The
problem arises when you accidentally, say, mix spaces and tabs, or, if
you're not using tabs (which is probably better), put in one more or
less space - stuff like that. This was not the problem in my case,
since I consistently use tabs. The problem arose - I think - because I
was switching text editors (Metapad and GVim on windows) at times in a
coding session. This somehow led to the changing of some tabs to
spaces. Hard to detect visually in a Windows style editor like Metapad.
Using the ":se list" option in GVim can help, but it still takes time
to track down and change all those spaces back to tabs. One can argue
away that one should not change editors in the middle of a session,
etc., but the point is that this problem simply would not happen in
Ruby, even if you switch editors midway.
Well ... there are language-specific IDEs for Python. If I were
planning/required to learn Python, I'd probably use Leo. I've got Leo
and if I can get it integrated with the languages I do use, Perl, R and
Ruby, I'll give it a shot. And there are language-specific IDEs for
Ruby. But don't *real* programmers use Emacs?
<ducking>
Actually, I've never bothered to learn Emacs. It had a (justified)
reputation as a memory hog, so I learned vi. I'm pretty sure GNU Emacs
is no longer a memory hog, but I'm so firmly down the "vim" path that
Emacs seems like a distraction.
