From: Robert Klemme <shortcutter@...>
Date: 2009-11-29T01:55:06+09:00
Subject: Re: where is grep?

On 11/28/2009 05:35 PM, Rick DeNatale wrote:
> On Sat, Nov 28, 2009 at 11:10 AM, Robert Klemme
> <shortcutter@googlemail.com> wrote:
>> On 11/28/2009 08:27 AM, David A. Black wrote:

>>> I would probably do this in 1.9:
>>>
>>>   string.lines.grep(/pattern/)
>>>
>>> where lines returns an enumerator.
>> Why not just string.scan(/pattern/) ?
> 
> Not the same thing
> 
> using 1.9
> 
> irb(main):001:0> a = "abe\nbob\nfred\njim"
> => "abe\nbob\nfred\njim"
> irb(main):002:0> a.scan(/b/)
> => ["b", "b", "b"]
> irb(main):003:0> a.lines.grep(/b/)
> => ["abe\n", "bob\n"]
> 
> a.lines.grep does the same thing that a.grep would do in 1.8, a.scan does not.

Stupid me, of course!  Thanks for the quick enlightenment.  I somehow 
had assumed the text the OP was ultimately interested in was that 
matched by the expression.  But that assumption is not covered by the 
posting.

Cheers

	robert

-- 
remember.guy do |as, often| as.you_can - without end
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