(Node.js) JSON: Access Array Values

Demonstrates how to access values in a JSON array.

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 json = new chilkat.JsonObject();

    var jsonStr = "{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", 22, \"green\"], \"price\": 125 }";

    var success = json.Load(jsonStr);
    if (success !== true) {
        console.log(json.LastErrorText);
        return;
    }

    // Get the "tags" array, which contains "home", 22, "green"
    // tagsArray: JsonArray
    var tagsArray = json.ArrayOf("tags");
    if (json.LastMethodSuccess == false) {
        console.log("tags member not found.");
        return;
    }

    // Get the value at each array index. 
    // Output will be:
    // [0] = home
    // [0] as integer = 0
    // [1] = 22
    // [1] as integer = 22
    // [2] = green
    // [2] as integer = 0

    var arraySize = tagsArray.Size;
    var i;
    for (i = 0; i <= arraySize - 1; i++) {

        var sValue = tagsArray.StringAt(i);

        console.log("[" + i + "] = " + sValue);

        var iValue = tagsArray.IntAt(i);
        console.log("[" + i + "] as integer = " + iValue);

    }

    // Note: The StringAt method returns the value as a string regardless of the type.

    // The IntAt method returns the value as an integer.  If the value does not convert to 
    // an integer, then 0 is returned

}

chilkatExample();