From: Chris Hulan Date: 2013-03-29T23:47:23+09:00 Subject: Re: Program with shuffle program --bcaec54c4e003fc29f04d9115941 Content-Type: text/plain; charset=ISO-8859-1 this line: return shuffled if unshuffled.index == 0 I think you mean return shuffled if unshuffled.length == 0 On Fri, Mar 29, 2013 at 10:40 AM, Vincent Stowbunenko wrote: > I am trying to make my own shuffle method instead of the build-in one. > From looking at the debugging program, the recursive_shuffle does not > return when unshuffled.length == 0. What went wrong there? > > See code below: > > [CODE] > class Array > > def shuffle > return self if self.length < 1 > recursive_shuffle self, [] > end > > def recursive_shuffle unshuffled, shuffled > random_index = rand(unshuffled.length) > shuffled << unshuffled.slice!(random_index) > return shuffled if unshuffled.index == 0 > recursive_shuffle unshuffled, shuffled > end > > end > > words = ['history', 'downstairs', 'adapter', 'mist', 'circumstance', > 'coast', 'fender', 'war', 'alcohol', 'attendance'] > puts words.shuffle > [\CODE] > > -- > Posted via http://www.ruby-forum.com/. > > --bcaec54c4e003fc29f04d9115941 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
this line:
=A0return shuffled if unshuffled.index =3D=3D 0
=

=
I th= ink you mean=A0
=A0return shuffled if unshuffled.length=A0=3D=3D 0


On Fri,= Mar 29, 2013 at 10:40 AM, Vincent Stowbunenko <lists@ruby-forum.com> wrote:
I am trying to make my own shuffle method in= stead of the build-in one.
From looking at the debugging program, the recursive_shuffle does not
return when unshuffled.length =3D=3D 0. =A0What went wrong there?

See code below:

[CODE]
class Array

=A0 def shuffle
=A0 =A0 return self if self.length < 1
=A0 =A0 recursive_shuffle self, []
=A0 end

=A0 def recursive_shuffle unshuffled, shuffled
=A0 =A0 random_index =3D rand(unshuffled.length)
=A0 =A0 shuffled << unshuffled.slice!(random_index)
=A0 =A0 return shuffled if unshuffled.index =3D=3D 0
=A0 =A0 recursive_shuffle unshuffled, shuffled
=A0 end

end

words =3D ['history', 'downstairs', 'adapter', '= ;mist', 'circumstance',
'coast', 'fender', 'war', 'alcohol', 'a= ttendance']
puts words.shuffle
[\CODE]

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


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