From: Phrogz <gavin@...>
Date: 2005-10-04T00:46:47+09:00
Subject: Re: String#scan_and_map (was: Re: split without lookbehind)

> Following is my hackish attempt to make a String#scan_and_map
> function that does the above.

OK, that was dumb. On the way to work I realized that the above can far
more correctly be implemented simply as:

class String
  def scan_and_map( regexp )
    results = []
    scan( regexp ){ |args|
      results << yield( args )
    }
    results
  end
end

str = 'foo,bar ,, baz,qux,,,jorb,jing,,,,blat'
p str.scan_and_map( /(.+?[^,],{2}*)(?:,(?!,)|$)/ ){ |saved,others|
  saved 
} 

#=> ["foo", "bar , baz", "qux,", "jorb", "jing,,blat"]