class Rational

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/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-2.10.2/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-3.1.9/lib/bigdecimal/util.rb, line 132
def to_d(precision)
  BigDecimal(self, precision)
end

Returns the value as a BigDecimal.

The required precision parameter is used to determine the number of significant digits for the result.

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-2.10.2/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}