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Comparing arrays without regards for order

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Daniel Berger

Posts: 1383
Nickname: djberg96
Registered: Sep, 2004

Daniel Berger is a Ruby Programmer who also dabbles in C and Perl
Comparing arrays without regards for order Posted: Jan 7, 2010 9:44 PM
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Original Post: Comparing arrays without regards for order
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Ever needed to compare two arrays to see if they had the same content, but the order of each wasn't necessarily the same? You can sort them each first:
array1 = [1, 2, 3]
array2 = [3, 1, 2]

array1.sort == array2.sort # true

It would be nice if Array#=~ did this. It's inherited from Object, but not redefined. Let's give it some meaningful semantics:
class Array
  def =~(other)
    self.sort == other.sort
  end
end

# And now
array1 =~ array2 # true

I love open classes. :)

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