Two arrays: return only values that exist in both arrays?

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

On Nov 23, 1:25 pm, Joshua M. [email protected] wrote:

Does there exist a method for this?

Thanks
Josh

Posted viahttp://www.ruby-forum.com/.

Try
a&b

Dima :slight_smile:

How about the elements that are in one but not the other array?

Where are these methods documented?

Thank you

Victor

Thanks! But right - where are they documented?

You’re looking for “a - b”, in that case.

http://ruby-doc.org/core/classes/Array.html

Hope that helps.

Joshua M. wrote:

Thanks! But right - where are they documented?
in ruby-doc :slight_smile:

http://ruby-doc.org/core/classes/Array.html#M002235

–Garret

Thank you

On Nov 23, 3:13 pm, Victor R. [email protected] wrote:

Hope that helps.

On Nov 23, 2007 7:55 AM, Dejan D. [email protected] wrote:

a&b

Dima :slight_smile:

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]