From: "David A. Black" <dblack@...>
Date: 2005-08-08T23:56:08+09:00
Subject: Re: String#to_ary and Test::Unit

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Hi --

On Mon, 8 Aug 2005, [ISO-8859-1] Brian Schr=F6der wrote:

> On 08/08/05, Trans <transfire@gmail.com> wrote:
>>
>> David A. Black wrote:
>>> This message is in MIME format.  The first part should be readable text=
,
>>>   while the remaining parts are likely unreadable without MIME-aware to=
ols.
>>>
>>> Hi --
>>>
>>> On Mon, 8 Aug 2005, [ISO-8859-1] Brian Schr=F6der wrote:
>>>
>>>> Another sidenote that removes the need for to_ary completely and is a
>>>> lot faster:
>>>
>>> It's not needed if it's OK just to call #each, but I thought the
>>> #to_ary call was part of Tom's original requirement.
>>
>> Unfortunately David is correct. In looking more closely at your
>> (Brian's) code offering, I see that it still uses #each. So in the
>> context of String, the same problem arsies --I can't count on a string
>> being iterated over by chars. I'll have to create an overriding #freq
>> method specifically for string --and the other methods that work the
>> same way.
>>
>> T.
>>
>>
>
> Yes, but why not use:
>
> probability_hash =3D "this is my string".split(//).freq
>
> Each object that could support to_ary can also support each, while not
> every object that has an each makes sense with to_ary. So it would
> seem better to me to put this functionality into the enumerable and
> supply an enumerable.

I got the impression Tom was just trying to make things as transparent
as possible (though given the String#to_ary infinite loop, transparent
as possible may not be very transparent).

> Then you can even do
>
> module CharString
>  def each(&block)
>    self.split(//).each &block
>  end
> end
>
> module WordString
>  def each(&block)
>    self.split(/\s+/).each &block
>  end
> end
>
> charstring =3D "some chars"
> class << charstring
>  include CharString
> end

I thought you disliked the "<<" notation :-)

   charstring.extend(CharString)


David

--=20
David A. Black
dblack@wobblini.net
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