Module: Thailand::Utils

Defined in:
lib/thailand/utils.rb

Class Method Summary collapse

Class Method Details

.deep_hash_merge(hashes) ⇒ Object

Merge an array of hashes deeply Returns a merged hash



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# File 'lib/thailand/utils.rb', line 5

def self.deep_hash_merge(hashes)
  return hashes.first if hashes.size == 1

  hashes.inject do |acc, hash|
    acc.merge(hash) do |_key, old_value, new_value|
      if old_value.respond_to?(:merge) && new_value.respond_to?(:merge)
        deep_hash_merge([old_value, new_value])
      else
        new_value || old_value
      end
    end
  end
end

.merge_arrays_by_keys(arrays, keys) ⇒ Object

Merge arrays of hashes using the specified keys Returns a single merges array of hashes



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# File 'lib/thailand/utils.rb', line 21

def self.merge_arrays_by_keys(arrays, keys)
  arrays.each_with_object([]) do |array, aggregate|
    array.each do |new_hash|
      # Find the matching element in the agregate array
      existing = aggregate.find do |hash|
        keys.any? { |key| hash[key] && hash[key] == new_hash[key] }
      end

      # Merge the new hash to an existing one, or append it if new
      existing ? existing.merge!(new_hash) : aggregate << new_hash
    end
  end
end