From: Robert Klemme <bob.news@...>
Date: 2005-02-07T03:35:11+09:00
Subject: Re: iteration the ruby way


"E S" <eero.saynatkari@kolumbus.fi> schrieb im Newsbeitrag 
news:20050206143902.PIMQ15813.fep31-app.kolumbus.fi@mta.imail.kolumbus.fi...
>> L�hett�j�: Kaspar Schiess <eule@space.ch>
>> Aihe: Re: iteration the ruby way
>>(In response to news:1107566961.943586.81760@g14g2000cwa.googlegroups.com
> by William James)
>>> Shouldn't that be
>>>
>>> ary[0...-1].each {|e| do_something(e) }
>>> do_something_else(ary.last)
>>>
>>> or
>>>
>>> ary[0..-2].each {|e| do_something(e) }
>>> do_something_else(ary.last)
>>>
>>> ?
>>
>>I would prefer this solution for its clarity of expression.
>
> Me too :) I just think the #inject won on the neat-o factor,
> particularly since it seemed adequate for the OP.

Partly yes and partly no: apart from the cute factor, there is a real 
advantage of the inject solutions show: they work for *all* Enumerables 
while the array indexing works only for arrays.  So #inject is more general. 
Also, Array#[] creates a new array instance along the way which is a bit 
inefficient.  But I do agree that the indexing might be more readable.

Kind regards

    robert