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{ | |
"AF": "Afghanistan", | |
"DZ": "Algeria", | |
"AS": "American Samoa", | |
"AD": "Andorra", | |
"AO": "Angola", | |
"AI": "Anguilla", | |
"AG": "Antigua & Barbuda", | |
"AR": "Argentina", | |
"AM": "Armenia", |
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class Array | |
def deep_dup | |
self.map do |el| | |
if !el.is_a? Array | |
el | |
elsif self.none? {|el| el.is_a? Array} | |
el.map {|el2| el2} | |
else | |
el.deep_dup |
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def subsets(array) | |
result = [[]] | |
array.each do |el| | |
result.each_with_index do |curr, i| | |
result << curr + [el] unless curr.include? el | |
end | |
end | |
result | |
end |