From: Ilias Lazaridis <ilias@...>
Date: 2011-06-05T23:00:31+09:00
Subject: Re: CORE - Altering Behaviour of "each do" (default param "item")

On 4 Ιούν, 17:50, James Gray <ja...@graysoftinc.com> wrote:
> [Note:  parts of this message were removed to make it a legal post.]
>
> On Sat, Jun 4, 2011 at 6:50 AM, Ilias Lazaridis <il...@lazaridis.com> wrote:
> > 1.9
>
> > names = ["Jane", "Michele", "Isabella"]
>
> > # current behaviour
> > names.each do |name|
> >  print name
> > end
>
> > #Question: How can I alter the behaviour of "each" in the following
> > way:
> > names.each do
> >  print item         # "item" is used by default
> > end
>
> > Is this possible, without going to C-level?
>
> Since
[...] - (off topic)

> class Item
>   def initialize(item)
>     @item = item
>   end
>
>   attr_reader :item
> end
>
> class Array
>   alias_method :sane_each, :each
>   def each(&iterator)
>     if iterator.arity.zero?

http://www.ruby-doc.org/docs/ProgrammingRuby/html/ref_c_method.html#Method.arity

>       sane_each do |item|
>         Item.new(item).instance_eval(&iterator)

Creating an object for each iteration.
Can this be avoided somehow?

>       end
>     else
>       sane_each(&iterator)
>     end
>   end
> end
>
> names = %w[Jane Michele Isabella]
>
> names.each do |name|
>   puts name
> end
>
> names.each do
>   puts item
> end
>
> __END__

This looks very good, and seems to work as expected.

> The most important thing to learn
[...] - (off-topic, crossing the line)

> http://www.nationmaster.com/encyclopedia/Ilias-Lazaridis

Have you checked the validity of this information? It was copied from
a wikipedia "article" (the original article was  deleted, due to
violation of the wikipedia policies).

The most important thing to learn is:

when is it "expressing negative feelings" and when is it "defamation
of character":

http://www.lawinfo.com/fuseaction/Client.lawarea/categoryid/1162

See, I'm looking in parallel for a contract within the ruby domain (as
I've chosen ruby for my own projects and thus I like to avoid to work
in another languages).

If you (people) continue to attack me on a *professional* level, I'll
have to react at some point.

So, please, set a filter, don't read or go get a dog.

Or stay calm and focus on the technical stuff.

.

--
http://lazaridis.com