Array with dynamic field names

I am passing this function different field names on each call. I would like it to post the interpolated string value of the variable field as the name of the posted var. Eg one post might have

data: { 'shoppingCartContents' : cartrow, 'numbe开发者_开发问答r' : number, 'foo' : value }

but every post just has

data: { 'shoppingCartContents' : cartrow, 'number' : number, 'field' : value }

even though field is not in quotes.

function update_personalization(cartrow, number, field, value) {
  $.ajax({
    type: 'POST',
    url: 'updatePersonalization.php',
    data: { 'shoppingCartContents' : cartrow, 'number' : number, field : value }
  });
}

What am I doing wrong?

---

You'll have to build the object differently:

   data: (function() {
     var rv = {shoppingCartContents: cartrow, number: number};
     rv[field] = value;
     return rv;
   })()

What that does is build up the object you want to pass as "data" in a little anonymous function. The function initializes a simple object with the static field names, then adds the dynamically-named field in a separate statement.

That's not really an "array", for what it's worth.