From: botp <botpena@...>
Date: 2010-10-17T11:42:00+09:00
Subject: Re: Can't understand String#split's behavior

On Sun, Oct 17, 2010 at 8:46 AM, 冷雨 <raincolee@gmail.com> wrote:
> I think that /A/ and /(A)/ are almost equivalent,

almost

> but why can't I use /(A)/ to split string?

as documented, you can, but w a different behaviour/result for split


(from ruby core)
=== Implementation from String
------------------------------------------------------------------------------
  str.split(pattern=$;, [limit])   -> anArray

------------------------------------------------------------------------------

Divides str into substrings based on a delimiter, returning an array of
these substrings.

If pattern is a String, then its contents are used as the
delimiter when splitting str. If pattern is a single
space, str is split on whitespace, with leading whitespace and runs of
contiguous whitespace characters ignored.

If pattern is a Regexp, str is divided where the pattern
matches. Whenever the pattern matches a zero-length string, str is split
into individual characters. If pattern contains groups, the
respective matches will be returned in the array as well.
....