Module: ActiveObject::Array

Defined in:
lib/active_object/array.rb

Instance Method Summary collapse

Instance Method Details

#after(value) ⇒ Object 



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# File 'lib/active_object/array.rb', line 3

def after(value)
  return(nil) unless include?(value)

  self[(index(value).to_i + 1) % length]
end

#before(value) ⇒ Object 



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# File 'lib/active_object/array.rb', line 9

def before(value)
  return(nil) unless include?(value)

  self[(index(value).to_i - 1) % length]
end

#delete_first ⇒ Object 



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# File 'lib/active_object/array.rb', line 15

def delete_first
  self[1..-1]
end

#delete_first! ⇒ Object 



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# File 'lib/active_object/array.rb', line 19

def delete_first!
  replace(delete_first)
end

#delete_last ⇒ Object 



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# File 'lib/active_object/array.rb', line 23

def delete_last
  self[0...-1]
end

#delete_last! ⇒ Object 



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# File 'lib/active_object/array.rb', line 27

def delete_last!
  replace(delete_last)
end

#delete_values(*args) ⇒ Object 



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# File 'lib/active_object/array.rb', line 31

def delete_values(*args)
  result = []
  args.each { |val| result << delete(val) }
  result
end

#dig(key, *rest) ⇒ Object 



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# File 'lib/active_object/array.rb', line 37

def dig(key, *rest)
  value = (self[key] rescue nil)
  return if value.nil?

  if rest.empty?
    value
  elsif value.respond_to?(:dig)
    value.dig(*rest)
  end
end

#duplicates(minimum = 2) ⇒ Object 



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# File 'lib/active_object/array.rb', line 48

def duplicates(minimum = 2)
  hash = Hash.new(0)

  each { |val| hash[val] += 1 }
  hash.delete_if { |_, val| val < minimum }.keys
end

#from(position) ⇒ Object 



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# File 'lib/active_object/array.rb', line 55

def from(position)
  self[position, length] || []
end

#groups(number) ⇒ Object 



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# File 'lib/active_object/array.rb', line 59

def groups(number)
  return([]) if number <= 0

  num, rem = length.divmod(number)
  collection = (0..(num - 1)).collect { |val| self[(val * number), number] }
  rem.positive? ? collection << self[-rem, rem] : collection
end

#in_groups(number, fill_with = nil) ⇒ Object

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



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# File 'lib/active_object/array.rb', line 68

def in_groups(number, fill_with = nil)
  collection_length = length
  division = collection_length.div(number)
  modulo = collection_length % number

  collection = []
  start = 0
  number.times do |int|
    mod_gt_zero = modulo.positive?
    grouping = division + (mod_gt_zero && modulo > int ? 1 : 0)
    collection << last_group = slice(start, grouping)
    last_group << fill_with if fill_with != false && mod_gt_zero && grouping == division
    start += grouping
  end

  block_given? ? collection.each { |val| yield(val) } : collection
end

#in_groups_of(number, fill_with = nil) ⇒ Object

rubocop:disable Metrics/MethodLength, Metrics/AbcSize



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# File 'lib/active_object/array.rb', line 88

def in_groups_of(number, fill_with = nil)
  if number.to_i <= 0
    raise ArgumentError,
          "Group length must be a positive integer, was #{number.inspect}"
  end

  if fill_with == false
    collection = self
  else
    padding = (number - length % number) % number
    collection = dup.concat(Array.new(padding, fill_with))
  end

  sliced_collection = collection.each_slice(number)

  block_given? ? sliced_collection { |val| yield(val) } : sliced_collection.to_a
end

#percentile(percentage) ⇒ Object

rubocop:enable Metrics/MethodLength, Metrics/AbcSize



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# File 'lib/active_object/array.rb', line 107

def percentile(percentage)
  total_size = size

  if total_size > 1
    index = (total_size * percentage) / 100.0
    sort[index]
  else
    first
  end
end

#probability ⇒ Object 



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# File 'lib/active_object/array.rb', line 118

def probability
  hash = Hash.new(0.0)
  differ = 0.0

  each do |val|
    hash[val] += 1.0
    differ += 1.0
  end

  hash.each_key { |val| hash[val] /= differ }
  hash
end

#reject_values(*args) ⇒ Object 



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# File 'lib/active_object/array.rb', line 131

def reject_values(*args)
  reject { |val| args.include?(val) }
end

#sample! ⇒ Object 



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# File 'lib/active_object/array.rb', line 135

def sample!
  delete_at(Random.rand(length - 1))
end

#split(number = nil) ⇒ Object

rubocop:disable Metrics/MethodLength, Metrics/AbcSize



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# File 'lib/active_object/array.rb', line 140

def split(number = nil)
  if block_given?
    each_with_object([[]]) do |element, results|
      yield(element) ? (results << []) : (results.last << element)
    end
  else
    results = [[]]
    arr = dup

    until arr.empty?
      if (idx = arr.index(number))
        results.last.concat(arr.shift(idx))
        arr.shift
        results << []
      else
        results.last.concat(arr.shift(arr.length))
      end
    end

    results
  end
end

#strip ⇒ Object

rubocop:enable Metrics/MethodLength, Metrics/AbcSize



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# File 'lib/active_object/array.rb', line 164

def strip
  reject(&:blank?)
end

#strip! ⇒ Object 



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# File 'lib/active_object/array.rb', line 168

def strip!
  replace(strip)
end

#to(position) ⇒ Object 



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# File 'lib/active_object/array.rb', line 172

def to(position)
  position >= 0 ? first(position + 1) : self[0..position]
end

#to_sentence(options = {}) ⇒ Object

rubocop:disable Metrics/MethodLength



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# File 'lib/active_object/array.rb', line 177

def to_sentence(options = {})
  default_connectors = {
    words_connector: ', ',
    two_words_connector: ' and ',
    last_word_connector: ', and '
  }
  options = default_connectors.merge!(options)

  case length
  when 0
    ''
  when 1
    self[0].to_s.dup
  when 2
    "#{self[0]}#{options[:two_words_connector]}#{self[1]}"
  else
    "#{self[0...-1].join(options[:words_connector])}#{options[:last_word_connector]}#{self[-1]}"
  end
end