Go

JSON: Miscellaneous Operations

See more JSON Examples

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

Go

    success := false

    json := chilkat.NewJsonObject()
    json.SetEmitCompact(false)

    // Assume the file contains the data as shown above..
    success = json.LoadFile("qa_data/json/sample2.json")
    if success == false {
        fmt.Println(json.LastErrorText())
        json.DisposeJsonObject()
        return
    }

    // Get the "sampleData" object:
    sampleData := chilkat.NewJsonObject()
    json.ObjectOf2("sampleData",sampleData)

    // Demonstrate BoolAt and BoolOf
    fmt.Println("hungry: ", *sampleData.BoolOf("hungry"))
    fmt.Println("hungry: ", *sampleData.BoolAt(2))

    // StringOf returns the value as a string regardless of it's actual type:
    fmt.Println("pi: ", *sampleData.StringOf("pi"))
    fmt.Println("answer: ", *sampleData.StringOf("answer"))
    fmt.Println("withoutValue: ", *sampleData.StringOf("withoutValue"))
    fmt.Println("hungry: ", *sampleData.StringOf("hungry"))

    // Demonstrate IsNullOf / IsNullAt
    fmt.Println("withoutValue is null? ", *sampleData.IsNullOf("withoutValue"))
    fmt.Println("withoutValue is null? ", *sampleData.IsNullAt(3))
    fmt.Println("apple is null? ", *sampleData.IsNullOf("apple"))
    fmt.Println("apple is null? ", *sampleData.IsNullAt(1))

    // IntOf
    fmt.Println("answer: ", sampleData.IntOf("answer"))

    // SetNullAt, SetNullOf
    // Set "pi" to null
    success = sampleData.SetNullAt(0)
    // Set "answer" to null
    success = sampleData.SetNullOf("answer")

    // Show the changes:
    fmt.Println(*json.Emit())

    // Restore pi and apple:
    success = sampleData.SetNumberAt(0,"3.14")
    success = sampleData.SetNumberOf("answer","42")

    // Show the changes:
    fmt.Println(*json.Emit())

    // Add a null value named "afterApple" just after "apple"
    success = sampleData.AddNullAt(2,"afterApple")

    // Add a boolean value just after "pi"
    success = sampleData.AddBoolAt(1,"afterPi",false)

    // Examine the changes..
    fmt.Println(*json.Emit())

    json.DisposeJsonObject()
    sampleData.DisposeJsonObject()