Add dynamic key-values to JSON object

Question

I'm trying to create a json object in javascript containing dynamic values. I need to pass this JSON Object to server through an AJAX call. But I'm unable to add the dynamic values.

var finalJSONObj={};
for loop(int i = 0; i<10;i++){
 // gets the values of rows i need to add .. 
 var taskValue = tasks[i]; // need to add this in the JSON Object
}

My final JSON object should look like:

finalJSONObj = {
 tasks1: 'taskValue',
 tasks2: 'taskValue',
 tasks3: 'taskValue',
 tasks4: 'taskValue',
 userId: 'abcd',
 date: '23/09/2016'
};

Need to add the "taskValue" retrieved from the for loop for each task in the JSON Object. Any Thoughts?

• sabithpocker: Do you know how to add key/value pair to a Javascript Object? Please refer this

Answer 1

How about:

var finalJSONObj={};
for (var i = 0; i<tasks.length; i++) {
 finalJSONObj[('tasks' + (i+1))] = tasks[i];
}

• skylark: Thanks! Works great! :)

Answer 2

You are doing it wrong. In forloop just change this syntax

var finalJSONObj={};
 for loop(int i = 0; i<10;i++){
 // gets the values of rows i need to add .. 
 finalJSONObj['task'+ (i + 1)] = tasks[i]; // need to add this in the JSON Object
}

Here key will be task + i which will be task1, task2 etc and value will be mapped to this key from your tasks array.

• skylark: This works fine! :) I finally got the results iterating through the request.getParameterValues() in my servlet. Thanks a ton! :)
• Avinash Agrawal: Always happy to help :) yw
• user663031: This is not going to work, since 'task' + i + 1 will evaluate to task01, task11, etc. (It is grouped as ('task' + i) + 1).