From: Robert Klemme <shortcutter@...>
Date: 2006-12-07T18:05:06+09:00
Subject: Re: Get Number of regex matches

On 06.12.2006 22:44, Martin DeMello wrote:
> On 12/7/06, Max Muermann <ruby@muermann.org> wrote:
>> On 12/7/06, Ingo Weiss <ingoweiss@gmail.com> wrote:
>> > Hi,
>> >
>> > how can I get the NUMBER of matches for a regular expression in a given
>> > string?
>> >
>> > For example: for string 'Banana' and regex /a/ I should get '3'
>> > (matches)
>> >
>>
>> Here's one way (but there are probably better ones):
>>
>> "Banana".scan(/a/).size
>> => 3
> 
> This one skips the intermediate array construction in return for some
> clunkiness:
> 
> i = 0
> banana.scan(/a/) { i += 1}
> i

 >> require 'enumerator'
=> true
 >> "banana".to_enum(:scan, /a/).inject(0) {|s,| s+1}
=> 3

:-)

	robert