Module: Daru::ArrayHelper

Defined in:
lib/daru/helpers/array.rb

Class Method Summary collapse

Class Method Details

.array_of?(array, match) ⇒ Boolean

Returns:

  • (Boolean) 


34
35
36
37
38
 
# File 'lib/daru/helpers/array.rb', line 34

def array_of?(array, match)
  array.is_a?(Array) &&
    !array.empty? &&
    array.all? { |el| match === el } # rubocop:disable Style/CaseEquality
end

.recode_repeated(array) ⇒ Object

Recode repeated values on an array, adding the number of repetition at the end Example:

a=%w{a b c c d d d e}
a.recode_repeated
=> ["a","b","c_1","c_2","d_1","d_2","d_3","e"]



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/daru/helpers/array.rb', line 11

def recode_repeated(array)
  return array if array.size == array.uniq.size

  # create hash of { <name> => 0}
  # for all names which are more than one time in array
  counter = array
            .group_by(&:itself)
            .select { |_, g| g.size > 1 }
            .map(&:first)
            .collect { |n| [n, 0] }.to_h

  # ...and use this hash for actual recode
  array.collect do |n|
    if counter.key?(n)
      counter[n] += 1
      new_n = '%s_%d' % [n, counter[n]]
      n.is_a?(Symbol) ? new_n.to_sym : new_n
    else
      n
    end
  end
end