From: "David A. Black" <dblack@...>
Date: 2009-06-22T10:32:12+09:00
Subject: Re: regular expression gurus--help!

Hi --

On Mon, 22 Jun 2009, Harry Kakueki wrote:

> On Sun, Jun 21, 2009 at 9:26 PM, Sebastian
> Hungerecker<sepp2k@googlemail.com> wrote:
>>
>>>> "abcdefghijkl".scan(/(.)(?=(..))/).map(&:join)
>> => ["abc", "bcd", "cde", "def", "efg", "fgh", "ghi", "hij", "ijk", "jkl"]
>>
>> HTH,
>> Sebastian
>>
>>
>
> I am not the OP, but thanks for that solution.
> I learned more about regular expressions and relearned something about scan.
>
> It did not work on my machine so I changed it to this.
> p "abcdefghijkl".scan(/(.)(?=(..))/).map{|x| x.join}
>
> Is this     map(&:join)   using 1.9?

Yes. In general, &obj in that position triggers the use of obj.to_proc
as the code block for the method call, and in 1.9 there's a built-in
Symbol#to_proc method.


David

-- 
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