class Rational

# File vendor/bundle/ruby/3.4.0/gems/json-2.15.1/lib/json/add/rational.rb, line 9
def self.json_create(object)
  Rational(object['n'], object['d'])
end

See as_json.

# File vendor/bundle/ruby/3.4.0/gems/json-2.15.1/lib/json/add/rational.rb, line 29
def as_json(*)
  {
    JSON.create_id => self.class.name,
    'n'            => numerator,
    'd'            => denominator,
  }
end

Methods Rational#as_json and Rational.json_create may be used to serialize and deserialize a Rational object; see Marshal.

Method Rational#as_json serializes self, returning a 2-element hash representing self:

require 'json/add/rational'
x = Rational(2, 3).as_json
# => {"json_class"=>"Rational", "n"=>2, "d"=>3}

Method JSON.create deserializes such a hash, returning a Rational object:

Rational.json_create(x)
# => (2/3)

# File vendor/bundle/ruby/3.4.0/gems/bigdecimal-3.3.1/lib/bigdecimal/util.rb, line 135
def to_d(precision=0)
  BigDecimal(self, precision)
end

Returns the value as a BigDecimal.

The precision parameter is used to determine the number of significant digits for the result. When precision is set to 0, the number of digits to represent the float being converted is determined automatically. The default precision is 0.

require 'bigdecimal'
require 'bigdecimal/util'

Rational(22, 7).to_d(3)   # => 0.314e1

See also Kernel.BigDecimal.

# File vendor/bundle/ruby/3.4.0/gems/json-2.15.1/lib/json/add/rational.rb, line 46
def to_json(*args)
  as_json.to_json(*args)
end

Returns a JSON string representing self:

require 'json/add/rational'
puts Rational(2, 3).to_json

Output:

{"json_class":"Rational","n":2,"d":3}