Comments on: Ruby – A Lightning Tutorial

By: Arun

Arun — Tue, 23 Feb 2010 09:47:43 +0000

Good Tutorial . Add more notes

By: Pietro

Pietro — Sun, 05 Apr 2009 09:53:46 +0000

The code

def my_method(name, action) yield(name, action) end

my_method('Bob') { |name, action| puts "#{name} is doing #{action}" }

is not correct since mymethod needs 2 arguments like mymethod('Bob', 'smoking').

By: Connor

Connor — Sun, 25 May 2008 21:49:54 +0000

Thanks for the corrections Fingal and QBass!

@Fingal, I hadn't thought much about that, I suppose most languages deal more with public/private attributes rather than accessors. Objective-C however is an exception in that it works almost exactly like Ruby. I should add some explanation about them.

By: QBass

QBass — Sun, 25 May 2008 00:36:25 +0000

Variables in Ruby do not need to be declared, they leap into existence the first time they are used. This should probably read : Variables in Ruby do not need to be declared, they leap into existence the first time they are assigned a value. A variable that is first ‘used’ on the RHS doesn’t leap into existence.

By: Fingal

Fingal — Fri, 25 Apr 2008 22:01:28 +0000

Attribute readers, writers, and accessors may not have meaning for those who first encounter them in the "Scopes and Variables" section above.

What to do about this, if anything, depends, of course, on the intended audience, but if it's ruby newbies, ....