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fronx/hash_map_values.rb

Created August 18, 2011 19:14
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hash_map_values.rb
class Hash
def map_values(&block)
merge(self) { |k, v| block.call(v) }
end
end
puts ({:a => 1, :b => 2}.map_values { |x| x * 2})
# => {:a=>2, :b=>4}
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