full-stack/json at master · vasantakmr/full-stack · GitHub

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{} = object
[] = arrays


json data types:
array
object
number
string
null
bool

Reasons for json being lightweight:
1. json is text
2. js is the language of web. easy to parse
3. its shorter
4. more practical when compared to xml.


JSON:

{
    images: ["", "", "", ""]
}

XML:

<Images>
    <Image>""</Image>
    <Image>""</Image>
    <Image>""</Image>
    <Image>""</Image>
</Images>

public class Image {

}

public class Images{
    ArrayList<Image> images;
    String FirstName
}


obj = {
    images: ["", "", "", ""],
    firstname: ""
}

obj.images[0]

JSON.parse('{"ajay" : ["a", "b"], "ryan" : "c"  }')


JSON.parse('["a", "a", "v", "f"]')