I have two array of hashes. I'd like to compare the two arrays and decipher based on a particular hash key in each of the hashes
1) The common keys between the arrays
2) If one array contains hash key that is not present in the other array
The hashes (there may be two or more) in each of the arrays are the same structure
e.g.
@array1 = 
{
  {
    hour => "1",
    minute => "30",
    flag => "cmd1"
  },

  {
    hour => "1",
    minute => "30",
    flag => "cmd2"
  },

  {
    hour => "1",
    minute => "30",
    flag => "cmd3"
  }
};

@array2 = 
{
  {
    hour => "1",
    minute => "30",
    flag => "cmd1"
  },

  {
    hour => "1",
    minute => "30",
    flag => "cmd2"
  },

  {
    hour => "1",
    minute => "30",
    flag => "cmd3"
  },

  {
    hour => "1",
    minute => "30",
    flag => "cmd4"
  }

};

[download]
In this example if I wished to use the flag key for comparison purposes between the arrays. How do I do this ?
i.e. flag => "cmd4" only exists in @array2
This is a scaled down version of a real issue I have. Any help appreciated.

In reply to compare an array of hashes by Anonymous Monk

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