What's the best way to split this kind of string?

[Sam Kong]

Hi!

I'm trying to make a routine to make a Morris Number Sequence.
(http://www.ocf.berkeley.edu/~stoll/number_sequence.html)
I need to split a string in the following way, for example.

"111223133" => ["111", "22", "3", "1", "33"]

I can loop thru the string by each character, comparing with the
previous character.
But is there a quick and easy way?
Probably a regular expression?

Thanks.

Sam

[Jim Weirich]

This seems to work:

"111223133".scan(/1+|2+|3+|4+|5+|6+|7+|8+|9+|0+/)

=> ["111", "22", "3", "1", "33"]

--
-- Jim Weirich

--
Posted via http://www.ruby-forum.com/.

[Ross Bamford]

Maybe something like:

s.scan(/(\d)(\1*)/).map! { |e| e.join }
# => ["111", "22", "3", "1", "33"]

or:

s.scan(/0+|1+|2+|3+|4+|5+|6+|7+|8+|9+/)
# => ["111", "22", "3", "1", "33"]

--
Ross Bamford - ro...@roscopeco.REMOVE.co.uk

[William James]

"111223133".scan(/(.)(\1*)/).map{|x|x.join}

[Thiago Arrais]

On 3/13/06, Ross Bamford <ros...@roscopeco.co.uk> wrote:
> Maybe something like:
>
> s.scan(/(\d)(\1*)/).map! { |e| e.join }
> # => ["111", "22", "3", "1", "33"]

Hmm.... Clever

--
Thiago Arrais

[Andrew Johnson]

On Mon, 13 Mar 2006 17:23:56 +0900, Ross Bamford <ros...@roscopeco.co.uk>
wrote:
[snip]

> Maybe something like:
>
> s.scan(/(\d)(\1*)/).map! { |e| e.join }
> # => ["111", "22", "3", "1", "33"]
>
> or:
>
> s.scan(/0+|1+|2+|3+|4+|5+|6+|7+|8+|9+/)
> # => ["111", "22", "3", "1", "33"]

Or:

s.scan(/((.)\2*)/).transpose[0]

Boy, are my fingers glad to save those keystrokes :-)

andrew

--
Andrew L. Johnson http://www.siaris.net/
They're not soaking, they're rusting!
-- my wife (on my dishwashing habits)