On 11/22/06, Daniel N <has.sox / gmail.com> wrote:
> I want to check to see if two arrays contain the same values.
> That is, are they the same array but not in the same order.
>
> Example
> equal
> [1,2,3,4,"abc"] should equal [2,3,1,"abc",4]  and all the other different
> orders that are possible
>
> This should not be equal
> [1,2,3] and [1,1,2,3]
> [1,2,3,nil] and [nil, nil, nil, 1,2,1,3,2]
>
> At first I thought of
> (( array1 | array2 ) - array1).size == 0
>
> but this does not take into account duplicate values and the should not
> equals do equal :(.  In fact I have not been able work out how to use any of
> the standard array, or Enumerable methods in such a way I can check if two
> arrays contain the same values as well as taking into account duplicates.
>
> Any pointers?

What's wrong with:

irb(main):002:0> require 'set'
=> true
irb(main):003:0> t1 = [1,2,3,4,"abc"]
=> [1, 2, 3, 4, "abc"]
irb(main):004:0> t2 = [2,3,1,"abc",4]
=> [2, 3, 1, "abc", 4]
irb(main):005:0> s1 = Set.new(t1)
=> #<Set: {"abc", 1, 2, 3, 4}>
irb(main):006:0> s2 = Set.new(t2)
=> #<Set: {"abc", 1, 2, 3, 4}>
irb(main):007:0> s1 == s2
=> true
irb(main):008:0> s1.subset?(s2)
=> true
irb(main):009:0> s2.subset?(s1)
=> true



>
> Cheers
> Daniel
>
>


-- 
Stuart Yarus

<syarus at gmail dot com>