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class Hash
# Returns a new hash with the results of running +block+ once for every value.
# The keys are unchanged.
#
# { a: 1, b: 2, c: 3 }.transform_values { |x| x * 2 }
# # => { a: 2, b: 4, c: 6 }
def transform_values(&block)
result = self.class.new
each do |key, value|
result[key] = yield(value)
end
result
end
# Destructive +transform_values+
def transform_values!
each do |key, value|
self[key] = yield(value)
end
end
end
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