Ruby JSON处理 #

require 'json'

json_string = '{"name": "Ruby", "version": 3.3}'
data = JSON.parse(json_string)
data["name"]

data = JSON.parse(json_string, symbolize_names: true)
data[:name]

require 'json'

data = { name: "Ruby", version: 3.3 }
json_string = data.to_json
json_string = JSON.generate(data)

pretty_json = JSON.pretty_generate(data)

require 'json'

data = JSON.load(File.read("data.json"))
JSON.dump(data, File.open("output.json", "w"))

class Person
  attr_reader :name, :age

  def initialize(name, age)
    @name = name
    @age = age
  end

  def to_json(*args)
    { name: @name, age: @age }.to_json(*args)
  end

  def self.from_json(json)
    data = JSON.parse(json)
    new(data["name"], data["age"])
  end
end