Creating javascript object from array values

Question

I am attempting to create a javascript object so that I can tranfsorm it into a json string in order to update a mysql table via php. I'm new to objects and json in javascript and so I have followed a couple of tutorials on the web but still can't seem to be getting this to work:

var idArray = [ 1, 2, 3];
var slideNo = [ 1, 2, 3];
var isPublished = [ 0, 1, 0];
var floaText = [ 1, 0 , 1];
var myObject = [];
for(var i = 0; i < idArray.length; i++) {
 myObject[i] = {
 slideId : idArray[i],
 slideNo : slideNo [i],
 isPublished : isPublished [i],
 floatText : floaText [i]
 };
}
alert(myObject[0].slideId);

I can't seem to get the above code work. I also tried to add quoation makrs like this:

myObject[i] = {
 slideId : "\"" + idArray[i] + "\"",
 slideNo : "\"" + slideNo[i] + "\"",
 isPublish : "\"" + isPublished[i] + "\"",
 floatText : "\"" + floaText[i]
};

But that doesn't seem to work either. What am I doing wrong?

• Nick Law: sorry, I did actually have them as [] and not {} for the arrays
• Jason L.: Based on your example slideArray, publishArray and floatArray don't exist. You have them named slideNo, isPublished, and floaText.

Answer 1

Looks like your recent edit fixed one of the issues: you need [] around your arrays, not {}.

Next, you need to change your array variable names to match what you're using in your for loop.

Finally, myObject should probably be an array, not an object, so change its {} to [].

Here's an updated version of your code:

var idArray = [ 1, 2, 3];
var slideArray = [ 1, 2, 3];
var publishArray = [ 0, 1, 0];
var floatArray = [ 1, 0 , 1];
var myObject = [];
for(var i = 0; i < idArray.length; i++) {
 myObject[i] = {
 slideId : idArray[i],
 slideNo : slideArray[i],
 isPublished : publishArray[i],
 floatText : floatArray[i]
 };
}
alert(myObject[0].slideId);

• Nick Law: Thanks, I made those changes (see above code) but it still seems to be failing. In fact, not even the alert box is appearing. Any other suggestions?
• Oran Dennison: Anything that's keeping your alert box from appearing is outside of the code you've posted so far.

Answer 2

use JSON.stringify to convert object to json string

alert(JSON.stringify(myObject[i]));