util.JSONArray.put
Sets an element by position in the JSON array object.
Syntax
util.JSONArray.put(
   index INTEGER,
   value value-type ) - index is the index of the element in the JSON array object.
 - value is the value to be associated to the index.
 - value-type can be a simple string or numeric
type, a                         
RECORDor anDYNAMIC ARRAY. 
Usage
The put() method
sets an element value by position in the JSON array              
  object.
The first parameter is the index of the
element. The second parameter can be a simple                 string
or numeric value, or a complex variable defined as RECORD or
                    DYNAMIC ARRAY.
The index corresponding to the first element is 1.
If the element exists, the existing value is replaced.
Example
IMPORT util
MAIN
    DEFINE ja util.JSONArray
    DEFINE rec RECORD
               id INTEGER,
               name STRING
           END RECORD
    DEFINE arr DYNAMIC ARRAY OF INTEGER
    LET ja = util.JSONArray.create()
    CALL ja.put(1, 234)
    LET rec.id = 234
    LET rec.name = "Barton"
    CALL ja.put(2, rec)
    LET arr[1] = 234
    LET arr[2] = 2837
    CALL ja.put(3, arr)
    DISPLAY ja.toString()
END MAIN