Flatten the subsets : Set « Collections « Ruby






  1. Ruby
  2. Collections
  3. Set

Flatten the subsets


require 'set'

s = %w[ant ape cow hen hog].to_set # A set of words
t = s.divide {|x,y| x[0] == y[0]}  # Divide it into subsets
t.flatten!                         # Flatten the subsets
t == s                             # => true








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