Cody Taylor

I used JSON for the first time today and it’s really nothing special. I’ve heard about it a few times but never really given it much thought and theres no reason I should have. Here is the list of all you really need to know about this syntax for passing around name value pairs and arrays to javascript.

1. JSON is an acronym for ‘Javascript Object Notation’.
2. JSON is fast. Mostly because it is recognized natively by Javascript so there’s no processing overhead.
3. JSON is an ordered list of name value pairs.
4. JSON is so much easier to read and write than XML due to it’s simplicity.
5. Apperently (Untested by me) data is formatted as JSON then Ajax can travel across domains.
6. Almost every language used in web development either already has a JSON library or set of functions. If one doesn’t, then creating functions is a trivial task.
7. ‘var jsonObject = { ‘cody : ‘taylor’ };’ is referenced by ‘jsonObject.cody’ which gives us ‘taylor’.
8. ‘var jsonObect = {‘javascript’ : {‘json’ : ‘not xml’ };’ is referenced by ‘jsonObject.javascript.json’ which gives us ‘not xml’.
9. You can also reference the JSON object as if it was an associative array like ‘jsonObject[‘cody’]’ or ‘jsonObject.javascript[‘json’]’ which gives the same values as previously.
10. If you don’t want to use key/value pairs you can define a normal data array. ‘jsonObject = {‘arrayOfData’: {‘numbers’ : [‘1’, ‘2’, ‘3’]}};’ We use indexes for this dataset. Don’t use indexes for the collections defined in the ‘{ }’. ‘jsonObject.arrayOfData.numbers[1]’ will give us ‘2’.
11. You can put functions in the dataset to pass around executable code.

So now you know basically all there is to know about JSON.