Mega Code Archive

 

Categories / Ruby / Array

 

Inject a two-dimensional array to set

require 'set' games = [["Alice", "Bob"], ["Carol", "Ted"],          ["Alice", "Mallory"], ["Ted", "Bob"]] p players = games.inject(Set.new) { |set, game| game.each { |p| set << p }; set } # => #<Set: {"Alice", "Mallory", "Ted", "Carol", "Bob"}> p players << "Ted" # => #<Set: {"Alice", "Mallory", "Ted", "Carol", "Bob"}>