From: Hooopo <hoooopo@...>
Date: 2009-06-21T18:00:08+09:00
Subject: Re: regular expression gurus--help!

On Jun 21, 4:08 pm, Harry Kakueki <list.p...@gmail.com> wrote:
> On Sun, Jun 21, 2009 at 4:10 PM, timr<timra...@gmail.com> wrote:
> > I want all possible three letter sets for a string. Scan does this:
> > irb>
>
> > But I need:
> > # >> abc
> > # >> bcd
> > # >> cde
> > # >> def
> > etc.
>
> > I used to know the secret spell, but forgot it. Does anyone know how
> > to do this with regular expression
>
> Here is one way to get that result.
> (But not with a regular expression)
> Not all 3 letter sets but I think this is the result you are really looking for.
>
> str = "abcdefghijkl"
> puts str.unpack("a3X2"*(str.length-2))
>
> #output
> abc
> bcd
> cde
> def
> efg
> fgh
> ghi
> hij
> ijk
> jkl
>
> Harry
>
> --
> A Look into Japanese Ruby List in Englishhttp://www.kakueki.com/ruby/list.html

require'enumerator'
 "qwertyuiopasdfgd".scan(/./).each_cons(3){|x,y,z| p [x,y,z].join}
"qwe"
"wer"
"ert"
"rty"
"tyu"
"yui"
"uio"
"iop"
"opa"
"pas"
"asd"
"sdf"
"dfg"
"fgd"