Module: DataTools::HashOfArrays

Defined in:
lib/data_tools/hash_of_arrays.rb

Overview

keys can be anything values are always arrays

Instance Method Summary collapse

Instance Method Details

#append(hash2) ⇒ Object 



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# File 'lib/data_tools/hash_of_arrays.rb', line 5

def append(hash2)
  (self.keys | hash2.keys).inject({}) {|h,k| h[k] = Array(self[k]) + Array(hash2[k]); h}
end

#choose ⇒ Object 



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# File 'lib/data_tools/hash_of_arrays.rb', line 15

def choose
  each_with_object({}) do |(key, values), result|
    result[key] = yield values
  end
end

#coalesce(key1, args) ⇒ Object 



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# File 'lib/data_tools/hash_of_arrays.rb', line 9

def coalesce(key1, args)
  key2 = args[:into] or raise "usage: coalesce(key1, :into => key)"
  self[key2] += self[key1]
  delete(key1)
end