Node.js

Find and Delete Object from JSON Array

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

NODEJS_PRELUDE

function chilkatExample() {

    var 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"
    //  			}
    //  		]
    //  	  }
    //  	]
    //  }

    var json = new chilkat.JsonObject();
    success = json.LoadFile("qa_data/json/menus.json");
    if (success == false) {
        console.log(json.LastErrorText);
        return;
    }

    //  Find Menu B.
    // menu: JsonObject
    var 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: JsonArray
    var 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"
    var index = catArr.FindObject("name","Pasta",true);
    if (index < 0) {
        console.log("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.EmitCompact = false;
    console.log(json.Emit());


}

chilkatExample();