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  1. # https://g...content-available-to-author-only...b.com/1481377
  2. class Array
  3.   def bunch(num)
  4.     old = self.clone
  5.     new = []
  6.     while 1
  7.       bunched = []
  8.       num.times do
  9.         bunched << old.shift
  10.       end
  11.       new << bunched
  12.       break if old.empty?
  13.     end
  14.     new
  15.   end
  16. end
  17.  
  18. [1,2,3,5,6,7].keep_if {|i| i unless 0==i%2 }.bunch(2).each {|i| puts "#{i[0]}-#{i[1]}" }
  19.  
Success #stdin #stdout 0s 4760KB
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https://ideone.com/D1eP4J
language:
Ruby (ruby 2.5.5)
created:
11 years ago
visibility:
public

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