then¶ ↑

then is fork for method chain.

require 'then'

[1,2,3,3].then{|list|
  p list
  p list.reverse
}.uniq.then{ |list|
  p list
  p list.reverse
}

# [1, 2, 3, 3]
# [3, 3, 2, 1]
# [1, 2, 3]
# [3, 2, 1]

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