JSON Syntax

JSON (JavaScript Object Notation), is a standard for representing structured data based on JavaScript's object syntax. It is commonly used to transmit data in web apps via HTTP. For example, The HTTP requests we have been making in this course have been returning Jello issues as JSON.

JSON supports the following primitive data types:

• Strings, e.g. "Hello, World!"
• Numbers, e.g. 42 or 3.14
• Booleans, e.g. true
• Null, e.g. null

And the following collection types:

• Arrays, e.g. [1, 2, 3]
• Object literals, e.g. {"key": "value"}

JSON is similar to JavaScript objects and Python dictionaries. Keys are always strings, and the values can be any data type, including other objects.

The following is valid JSON data:

{
    "movies": [
        {
            "id": 1,
            "title": "Iron Man",
            "director": "Jon Favreau",
            "favorite": true
        },
        {
            "id": 2,
            "title": "The Avengers",
            "director": "Joss Whedon",
            "favorite": false
        }
    ]
}

First issue object:
  id: 0 (number)
  name: "Fix the thing" (string)
  estimate: 0.5 (number)
  completed: false (boolean)

Second issue object:
  id: 1 (number)
  name: "Unstick the widget" (string)
  estimate: 30 (number)
  completed: false (boolean)

name: "Wayne Lagner" (string)
role: "Developer" (string)
remote: true (boolean)