Module: Coaster::Util

Defined in:
lib/coaster/util.rb

Constant Summary collapse

FLATTEN_HASH_DELIMITER = 
'.'.freeze
ARRAY_START = 
0

Class Method Summary collapse

Class Method Details

.flatten_hashify(object, delimiter: FLATTEN_HASH_DELIMITER, breadcrumbs: [], array_start: nil) ⇒ Object

array_start가 0이면 array를 ‘1’=>‘vlah’ array_start가 1이면 array를 ‘2’=>‘vlah’ array_start가 nil이면 그대로 [‘blah’, ‘vlah’] 로 처리



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# File 'lib/coaster/util.rb', line 10

def flatten_hashify(object, delimiter: FLATTEN_HASH_DELIMITER, breadcrumbs: [], array_start: nil)
  case object
  when Hash
    object.each_with_object({}) do |(key, value), memo|
      memo.merge!(flatten_hashify(value, delimiter: delimiter, breadcrumbs: breadcrumbs + [key], array_start: array_start))
    end
  when Array
    if array_start
      object.each.with_index(array_start).with_object({}) do |(element, ix), memo|
        memo.merge!(flatten_hashify(element, delimiter: delimiter, breadcrumbs: breadcrumbs + [ix], array_start: array_start))
      end
    else
      {breadcrumbs.join(delimiter) => object}
    end
  else
    {breadcrumbs.join(delimiter) => object}
  end
end

.roughen_hashify(object, delimiter: FLATTEN_HASH_DELIMITER, array_start: nil) ⇒ Object

숫자로 된 키는 무조건 array로 처리함 array_start는 nil일 경우 기본값은 Util::ARRAY_START = 0



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# File 'lib/coaster/util.rb', line 31

def roughen_hashify(object, delimiter: FLATTEN_HASH_DELIMITER, array_start: nil)
  array_start ||= ARRAY_START

  step1 = object.each_with_object({}) do |(key, value), memo|
    sp_keys = key.split(delimiter)
    k = sp_keys.shift
    if sp_keys.present?
      memo[k] ||= {}
      memo[k][sp_keys.join(delimiter)] = value
    else
      memo[k] = value
    end
  end

  step2 = step1.each_with_object({}) do |(key, value), memo|
    case value
    when Hash
      memo[key] = roughen_hashify(value, delimiter: delimiter, array_start: array_start)
    else
      memo[key] = value
    end
  end

  array_keys = (array_start...(step2.keys.size+array_start)).to_a
  step2_keys = step2.keys.map {|k| Integer(k)} rescue nil
  if array_keys == step2_keys
    step3 = []
    array_keys.map(&:to_s).each do |k|
      step3 << step2[k]
    end
    step3
  else
    step2
  end
end