On 2006-12-07 04:02:55 -0500, Robert Klemme <shortcutter / googlemail.com> said:

> 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

banana.split('').reject { |i| i if i != 'a' }.length

I want extra points for using "banana.split".

Best,
James