From: Joe Seeley <joiey.seeley@...>
Date: 2006-08-17T23:08:42+09:00
Subject: Re: Array Comparison

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You could always add an XOR function to the Array class.

class Array
  def XOR(i)
    return (i | self) - (i & self)
  end

  def ^(i)
    return XOR(i)
  end
end

It should be there already anyway, even if it is just syntactic sugar...

On 8/17/06, Kroeger, Simon (ext) <simon.kroeger.ext@siemens.com> wrote:
>
>
> > From: aidy [mailto:aidy.rutter@gmail.com]
> > Sent: Thursday, August 17, 2006 1:35 PM
> >
> > Hi Guys
> >
> > I have compared an array and '0' is being returned which indicates to
> > me that that array is equal
> >
> > p t = $ie.table(:index, '2').to_a.flatten
> > p t <=> ["HINCKLEY", "HINDHEAD", "HINTON ST GEORGE"]
> >
> > Now would it be possible for me to extract any differences from this
> > array  (that is, when the array is not equal)?
> >
> > Or should I really be using Test::Unit: to assert array equality?
> >
> > aidy
>
> t = [2, 3, 4, 5]
>
> # use == if you want to test for equality
> p t == [2, 3, 4, 5] # => true
>
> if t != [3, 4, 5, 6]
>   # you may use the array set methods to show the differences
>   p t - [3, 4, 5, 6] #=> [2]
>   p [3, 4, 5, 6] - t #=> [6]
>   p ([3, 4, 5, 6] | t) - ([3, 4, 5, 6]  & t) #=> [6, 2]
> end
>
> cheers
>
> Simon
>
>

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