(Go) Modify Parts of JSON Document

Demonstrates how to modify parts of a JSON document. This example uses the following JSON document:

{
   "fruit": [
      	{
         "kind": "apple",
	 "count": 24,
	 "fresh": true,
	 "extraInfo": null,
	 "listA": [ "abc", 1, null, false ],
	 "objectB": { "animal" : "monkey" }
      	},
	{
         "kind": "pear",
	 "count": 18,
	 "fresh": false,
	 "extraInfo": null
	 "listA": [ "xyz", 24, null, true ],
	 "objectB": { "animal" : "lemur" }
	}
    ],
    "list" : [ "banana", 12, true, null, "orange", 12.5, { "ticker": "AAPL" }, [ 1, 2, 3, 4, 5 ] ],
    "alien" : true
}

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    json := chilkat.NewJsonObject()

    // Load the JSON from a file.
    success := json.LoadFile("qa_data/json/modifySample.json")
    if success != true {
        fmt.Println(json.LastErrorText())
        json.DisposeJsonObject()
        return
    }

    // This example will not check for errors (i.e. null / false / 0 return values)...

    // Get the "list" array:
    listA := json.ArrayOf("list")

    // Modify values in the list.

    // Change banana to plantain
    success = listA.SetStringAt(0,"plantain")

    // Change 12 to 24
    success = listA.SetIntAt(1,24)

    // Change true to false
    success = listA.SetBoolAt(2,false)

    // Is the 3rd item null?
    bNull := listA.IsNullAt(3)

    // Change "orange" to 32.
    success = listA.SetIntAt(4,32)

    // Change 12.5 to 31.2
    success = listA.SetNumberAt(5,"31.2")

    // Replace the { "ticker" : "AAPL" } object with { "ticker" : "GOOG" }
    // Do this by deleting, then inserting a new object at the same location.
    success = listA.DeleteAt(6)
    success = listA.AddObjectAt(6)
    tickerObj := listA.ObjectAt(6)
    success = tickerObj.AddStringAt(-1,"ticker","GOOG")

    tickerObj.DisposeJsonObject()

    // Replace "[ 1, 2, 3, 4, 5 ]" with "[ "apple", 22, true, null, 1080.25 ]"
    success = listA.DeleteAt(7)
    success = listA.AddArrayAt(7)
    aa := listA.ArrayAt(7)
    success = aa.AddStringAt(-1,"apple")
    success = aa.AddIntAt(-1,22)
    success = aa.AddBoolAt(-1,true)
    success = aa.AddNullAt(-1)
    success = aa.AddNumberAt(-1,"1080.25")
    aa.DisposeJsonArray()

    listA.DisposeJsonArray()

    // Get the "fruit" array
    aFruit := json.ArrayAt(0)

    // Get the 1st element:
    appleObj := aFruit.ObjectAt(0)

    // Modify values by member name:
    success = appleObj.SetStringOf("fruit","fuji_apple")
    success = appleObj.SetIntOf("count",46)
    success = appleObj.SetBoolOf("fresh",false)
    success = appleObj.SetStringOf("extraInfo","developed by growers at the Tohoku Research Station in Fujisaki")

    appleObj.DisposeJsonObject()

    // Modify values by index:
    pearObj := aFruit.ObjectAt(1)
    success = pearObj.SetStringAt(0,"bartlett_pear")
    success = pearObj.SetIntAt(1,12)
    success = pearObj.SetBoolAt(2,false)
    success = pearObj.SetStringAt(3,"harvested in late August to early September")
    pearObj.DisposeJsonObject()

    aFruit.DisposeJsonArray()

    json.SetEmitCompact(false)
    fmt.Println(*json.Emit())

    json.DisposeJsonObject()