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# frozen_string_literal: true
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 }
#
# If you do not provide a +block+, it will return an Enumerator
# for chaining with other methods:
#
# { a: 1, b: 2 }.transform_values.with_index { |v, i| [v, i].join.to_i } # => { a: 10, b: 21 }
def transform_values
return enum_for(:transform_values) { size } unless block_given?
return {} if empty?
result = self.class.new
each do |key, value|
result[key] = yield(value)
end
result
end unless method_defined? :transform_values
# Destructively converts all values using the +block+ operations.
# Same as +transform_values+ but modifies +self+.
def transform_values!
return enum_for(:transform_values!) { size } unless block_given?
each do |key, value|
self[key] = yield(value)
end
end unless method_defined? :transform_values!
# TODO: Remove this file when supporting only Ruby 2.4+.
end
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