Xbase++

Understanding JSON Array vs JSON Object

See more JSON Examples

This example explains the difference between a JSON Array and a JSON Object. A JSON Array begins with "[" and ends with "]", whereas a JSON Object begins with "{" and ends with "}".

Elements contained in a JSON array are accessed by index, whereas elements in a JSON object are typically accessed by name (but can also be accessed by index).

Xbase++

LOCAL nSuccess
LOCAL cStrJsonArray
LOCAL oJsonA
LOCAL cStrJsonObj
LOCAL oJsonO

nSuccess := 0

//  A JSON array should be loaded into a Chilkat JSON array,
//  whereas a JSON object should be loaded into a Chilkat JSON object.

//  A JSON array may contain objects, and a JSON object may contains arrays, but
//  it is the top-level (outermost) element that defines whether the JSON
//  document is an array or an object.
//  An array begins and ends with "[" ... "]"
//  An object begins and ends with "{" ... "}"

//  For example, an array containing 2 objects:
cStrJsonArray := '[ { "name": "Bill" }, { "name": "Ted" } ]'

//  Load it into a JSON array.
oJsonA := CreateObject("Chilkat.JsonArray")
nSuccess := oJsonA:Load(cStrJsonArray)
? "number of array elements: " + Str(oJsonA:Size)

//  This is an object containing an array:
cStrJsonObj := '{ "characters": [ "Bill", "Ted" ] }'

//  Load it into a JSON object.
oJsonO := CreateObject("Chilkat.JsonObject")
nSuccess := oJsonO:Load(cStrJsonObj)
? "number of object members: " + Str(oJsonO:Size)

oJsonA:destroy()
oJsonO:destroy()