JS Data Structures - array and "object" (key/value pair)

JSON - JavaScript Object Notation

JSON array Example:

                ['Autumn', 'Winter', 'Spring', 'Summer']
              

JSON object Examples:

Simple "name/value" pairs:

                {
                  "lastName" : "Bacow",
                  "firstName" : "Lawrence",
                  "email" : "president@harvard.edu"
                }
              

"name/value" pairs, with values being an array (list) of things:

                {
                  "apples" : ['Macoun','Empire','Honey Crisp','Albemarle Pippin'],
                  "oranges" : ['Naval Orange','Tangelo','Clementine','Valencia Orange']
                }
              

More about JSON

A data format widely used in Ajax is JSON -- this format is used to pass data from the web server to the browser, and it is in a format that is easily worked with in JavaScript.

We first need to take a look at the JSON format and how we can work with it, and then we'll see how this works together in Ajax.

The introduction to JSON from json.org is a great place to start: