Top Level Namespace

Defined Under Namespace

Modules: ActionSet, Export, Pagination, Params, Sort Classes: ActiveSet

Instance Method Summary collapse

Instance Method Details

#flatten_keys_of(input, keys = [], output = {}, flattener: ->(*keys) { keys }, flatten_arrays: false) ⇒ Object

refactored from stackoverflow.com/a/23861946/2884386



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# File 'lib/helpers/flatten_keys_of.rb', line 27

def flatten_keys_of(input, keys = [], output = {}, flattener: ->(*keys) { keys }, flatten_arrays: false)
  if input.is_a?(Hash)
    input.each do |key, value|
      flatten_keys_of(
        value,
        keys + Array.wrap(key),
        output,
        flattener: flattener,
        flatten_arrays: flatten_arrays
      )
    end
  elsif input.is_a?(Array) && flatten_arrays
    input.each_with_index do |value, index|
      flatten_keys_of(
        value,
        keys + Array.wrap(index),
        output,
        flattener: flattener,
        flatten_arrays: flatten_arrays
      )
    end
  else
    return output.merge!(flattener.call(*keys) => input)
  end

  output
end

#string_to_sortable_numeric(string) ⇒ Object

rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity



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# File 'lib/helpers/transform_to_sortable_numeric.rb', line 40

def string_to_sortable_numeric(string)
  string                                          # 'aB09ü'
    .split('')                                    # ["a", "B", "0", "9", "ü"]
    .map { |char| char.ord.to_s.rjust(3, '0') }   # ["097", "066", "048", "057", "252"]
    .insert(1, '.')                               # ["097", ".", "066", "048", "057", "252"]
    .reduce(&:concat)                             # "097.066048057252"
    .to_r                                         # (24266512014313/250000000000)
end

#time_to_sortable_numeric(time) ⇒ Object

rubocop:enable Style/AsciiComments



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# File 'lib/helpers/transform_to_sortable_numeric.rb', line 50

def time_to_sortable_numeric(time)
  # https://stackoverflow.com/a/30604935/2884386
  (time.utc.to_f * 1000).round
end

#transform_to_sortable_numeric(value) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity



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# File 'lib/helpers/transform_to_sortable_numeric.rb', line 17

def transform_to_sortable_numeric(value)
  # https://www.justinweiss.com/articles/4-simple-memoization-patterns-in-ruby-and-one-gem/#and-what-about-parameters
  @sortable_numeric ||= Hash.new do |h, key|
    h[key] = if key.is_a?(Numeric)
               key
             elsif key == true
               1
             elsif key == false
               0
             elsif key.is_a?(String) || key.is_a?(Symbol)
               string_to_sortable_numeric(key.to_s)
             elsif key.is_a?(Date)
               time_to_sortable_numeric(Time.new(key.year, key.month, key.day, 0o0, 0o0, 0o0, 0))
             elsif key.respond_to?(:to_time)
               time_to_sortable_numeric(key.to_time)
             else
               key
             end
  end
  @sortable_numeric[value]
end