Go

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. Go

    success := false

    // This example will delete the "Pasta" category object from Menu B.

    // {
    //   "menus": [
    //     {
    //       "name": "Menu A",
    //       "categories": [
    // 			{
    // 			"name": "Kebabs",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Burgers",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Pasta",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Appetizers",
    // 			"description": "blah blah blah"
    // 			}
    // 		]
    // 	},
    //     {
    //       "name": "Menu B",
    //       "categories": [
    // 			{
    // 			"name": "Kebabs",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Burgers",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Pasta",
    // 			"description": "blah blah blah"
    // 			},
    // 			{
    // 			"name": "Appetizers",
    // 			"description": "blah blah blah"
    // 			}
    // 		]
    // 	  }
    // 	]
    // }

    json := chilkat.NewJsonObject()
    success = json.LoadFile("qa_data/json/menus.json")
    if success == false {
        fmt.Println(json.LastErrorText())
        json.DisposeJsonObject()
        return
    }

    // Find Menu B.
    menu := json.FindRecord("menus","name","Menu B",true)
    // assume menu is found..

    // Get the categories array, and then find the index of the "Pasta" menu category.
    catArr := menu.ArrayOf("categories")
    // Assume it is found..

    // Find the object where the name of the JSON member is "name", and the value is "Pasta"
    index := catArr.FindObject("name","Pasta",true)
    if index < 0 {
        fmt.Println("Pasta not found.")
    } else {

        // Delete the "Pasta" category record from Menu B
        success = catArr.DeleteAt(index)
        // Assume OK..
    }

    // Examine the JSON to see if it worked as expected..
    json.SetEmitCompact(false)
    fmt.Println(*json.Emit())

    catArr.DisposeJsonArray()
    menu.DisposeJsonObject()

    json.DisposeJsonObject()