JSON, CSV, and Data Exchange

JSON Generate

JSON.generate turns Ruby hashes and arrays into JSON text.

json generate Generating JSON is useful when Ruby needs to send or save structured data as text.

JSON Generate

status
json_generate.rb
Replay: real traced execution (multi-file project)
require "json"

status = "active"
record = {
  name: "Ruby",
  status: status,
  lessons: 4
}

json_text = JSON.generate(record)
status_text = record[:status]

puts "status=#{status_text}"
puts "json=#{json_text}"

require "json"

status = "paused"
record = {
  name: "Ruby",
  status: status,
  lessons: 4
}

json_text = JSON.generate(record)
status_text = record[:status]

puts "status=#{status_text}"
puts "json=#{json_text}"

require "json"

status = "archived"
record = {
  name: "Ruby",
  status: status,
  lessons: 4
}

json_text = JSON.generate(record)
status_text = record[:status]

puts "status=#{status_text}"
puts "json=#{json_text}"

  1. status ← active, json_text ← {"name":"Ruby","status":"active","lessons":4}

    1require "json"23status→ active = "active"  #@status="paused", "archived"4record = {5  name: "Ruby",6  status: status,7  lessons: 48}910json_text→ {"name":"Ruby","status":"active","lessons":4} = JSON.generate(record){"name":"Ruby","status":"active","lessons":4}11status_text→ active = record[:status]active1213puts "status=#{status_textactive}"14puts "json=#{json_text{"name":"Ruby","status":"active","lessons":4}}"
    outputstatus=active
json={"name":"Ruby","status":"active","lessons":4}

  1. status ← paused, json_text ← {"name":"Ruby","status":"paused","lessons":4}

    1require "json"23status→ paused = "paused"4record = {5  name: "Ruby",6  status: status,7  lessons: 48}910json_text→ {"name":"Ruby","status":"paused","lessons":4} = JSON.generate(record){"name":"Ruby","status":"paused","lessons":4}11status_text→ paused = record[:status]paused1213puts "status=#{status_textpaused}"14puts "json=#{json_text{"name":"Ruby","status":"paused","lessons":4}}"
    outputstatus=paused
json={"name":"Ruby","status":"paused","lessons":4}

  1. status ← archived, json_text ← {"name":"Ruby","status":"archived","lessons":4}

    1require "json"23status→ archived = "archived"4record = {5  name: "Ruby",6  status: status,7  lessons: 48}910json_text→ {"name":"Ruby","status":"archived","lessons":4} = JSON.generate(record){"name":"Ruby","status":"archived","lessons":4}11status_text→ archived = record[:status]archived1213puts "status=#{status_textarchived}"14puts "json=#{json_text{"name":"Ruby","status":"archived","lessons":4}}"
    outputstatus=archived
json={"name":"Ruby","status":"archived","lessons":4}