From: Dejan Dimic <dejan.dimic@...>
Date: 2007-11-24T04:05:07+09:00
Subject: Re: Two arrays: return only values that exist in both arrays?

On Nov 23, 3:13 pm, Victor Reyes <victor.re...@gmail.com> wrote:
> Note:  parts of this message were removed by the gateway to make it a legal Usenet post.
>
> Thank you
>
> On Nov 23, 2007 8:26 AM, Garret Kelly <garret.ke...@gmail.com> wrote:
>
> > You're looking for "a - b", in that case.
>
> >http://ruby-doc.org/core/classes/Array.html
>
> > Hope that helps.
>
> > On Nov 23, 2007 8:06 AM, Victor Reyes <victor.re...@gmail.com> wrote:
> > > How about the elements that are in one but not the other array?
>
> > > Where are these methods documented?
>
> > > Thank you
>
> > > Victor
>
> > > On Nov 23, 2007 7:55 AM, Dejan Dimic <dejan.di...@gmail.com> wrote:
>
> > > > On Nov 23, 1:25 pm, Joshua Muheim <fo...@josh.ch> wrote:
> > > > > Hi all
>
> > > > > a = [:one, :two, :three, :six]
> > > > > b = [:two, :four, :five: six]
>
> > > > > I want to extract the values of two arrays which exist in both ones
> > (a
> > > > > and b):
>
> > > > > # => [:two, :six]
>
> > > > > Does there exist a method for this?
>
> > > > > Thanks
> > > > > Josh
> > > > > --
> > > > > Posted viahttp://www.ruby-forum.com/.
>
> > > > Try
> > > > a&b
>
> > > > Dima :-)


Programming Ruby
The Pragmatic Programmer's Guide

class Array
instance methods
&  arr & anOtherArray -> anArray

Set Intersection---Returns a new array containing elements common to
the two arrays, with no duplicates.

[ 1, 1, 3, 5 ] & [ 1, 2, 3 ]  >> [1, 3]