Class: DynportTools::DeepMerger

Inherits:
Object
  • Object
show all
Defined in:
lib/dynport_tools/deep_merger.rb

Class Method Summary collapse

Class Method Details

.merge(a, b) ⇒ Object 



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# File 'lib/dynport_tools/deep_merger.rb', line 3

def merge(a, b)
  if a.is_a?(Hash) && b.is_a?(Hash)
    merge_hashes(a, b)
  elsif a.is_a?(Array) && b.is_a?(Array)
    merge_arrays(a, b)
  else
    b
  end
end

.merge_arrays(a, b) ⇒ Object 



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# File 'lib/dynport_tools/deep_merger.rb', line 13

def merge_arrays(a, b)
  [a.length, b.length].max.times.map do |i|
    if b.length < i + 1
      a[i]
    elsif a.length < i + 1
      b[i]
    else
      merge(a[i], b[i])
    end
  end
end

.merge_hashes(a, b) ⇒ Object 



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# File 'lib/dynport_tools/deep_merger.rb', line 25

def merge_hashes(a, b)
  (a.keys + b.keys).uniq.inject({}) do |hash, key|
    if !a.has_key?(key)
      hash[key] = b[key]
    elsif !b.has_key?(key)
      hash[key] = a[key]
    else
      hash[key] = merge(a[key], b[key])
    end
    hash
  end
end