(Node.js) Loading and Parsing a JSON Array

A JSON array is JSON that begins with "[" and ends with "]". For example, this is a JSON array that contains 3 JSON objects.

[{"name":"jack"},{"name":"john"},{"name":"joe"}]

A JSON object, however, is JSON that begins with "{" and ends with "}". For example, this JSON is an object that contains an array.

{"pets":[{"name":"jack"},{"name":"john"},{"name":"joe"}]}

This example shows how loading a JSON array is different than loading a JSON object.

Install Chilkat for Node.js and Electron using npm at

Chilkat npm packages for Node.js
Chilkat npm packages for Electron
on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    var strJsonArray = "[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]";

    var strJsonObject = "{\"pets\":[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]}";

    // A JSON array must be loaded using JsonArray:
    var jsonArray = new chilkat.JsonArray();
    jsonArray.Load(strJsonArray);

    // Examine the values:
    var i = 0;
    while (i < jsonArray.Size) {
        // jsonObj: JsonObject
        var jsonObj = jsonArray.ObjectAt(i);
        console.log(i + ": " + jsonObj.StringOf("name"));

        i = i+1;
    }

    // Output is:

    // 	0: jack
    // 	1: john
    // 	2: joe

    // A JSON object must be loaded using JsonObject
    var jsonObject = new chilkat.JsonObject();
    jsonObject.Load(strJsonObject);

    // Examine the values:
    i = 0;
    var numPets = jsonObject.SizeOfArray("pets");
    while (i < numPets) {
        jsonObject.I = i;
        console.log(i + ": " + jsonObject.StringOf("pets[i].name"));
        i = i+1;
    }

    // Output is:

    // 	0: jack
    // 	1: john
    // 	2: joe

}

chilkatExample();