TECH603 Day 2 - Working with JSON data from a file

countries.json

[
    {
        "id": "AGO",
        "name": "Angola",
        "population": 21471618,
        "capital": "Luanda",
        "latitude": -8.81155,
        "longitude": 13.242,
        "income_level": "Upper Middle",
        "high_income": false
    },
    {
        "id": "ATG",
        "name": "Antigua and Barbuda",
        "population": 89985,
        "capital": "Saint John's",
        "latitude": 17.1175,
        "longitude": -61.8456,
        "income_level": "High",
        "high_income": true
    },
    {
        "id": "BLR",
        "name": "Belarus",
        "population": 9466000,
        "capital": "Minsk",
        "latitude": 53.9678,
        "longitude": 27.5766,
        "income_level": "Upper Middle",
        "high_income": false
    },
    {
        "id": "CAF",
        "name": "Central African Republic",
        "population": 4616417,
        "capital": "Bangui",
        "latitude": 5.63056,
        "longitude": 21.6407,
        "income_level": "Low",
        "high_income": false
    },
    {
        "id": "CHE",
        "name": "Switzerland",
        "population": 8081482,
        "capital": "Bern",
        "latitude": 46.948,
        "longitude": 7.44821,
        "income_level": "High",
        "high_income": true
    }
]

whatever.rb

# require "./countries"
require_relative "countries"

# `JSON` is in the Standard Library
require "json"

puts COUNTRIES.first
# puts COUNTRIES.last
# puts COUNTRIES.class

# `File` is in the Core API
countries_text = File.read("countries.json")
countries = JSON.parse(countries_text)
puts countries.first

# did we get the same data from both places?
puts countries.first == COUNTRIES.first

new_json = JSON.dump(countries)
File.open("countries2.json", "w") do |file|
  file.write new_json
end

countries2_text = File.read("countries2.json")
countries2 = JSON.parse(countries2_text)
puts countries2.first

puts ((countries2.first == COUNTRIES.first) && (countries2.first == countries.first))