Question

I’m trying to do this for a multidimensional array and can’t figure out why it doesn’t work for a single dimensional array:

function doArray() {
   var msg = [];
    msg.push({entryID : "test"});
    alert(msg[entryID]);
}

I get undefined when I try to alert it. What’s wrong here? Thanks.

Answer 1

First, you have to use the index for the array ([0]), and then you need to quote the keyname to access the value in the object you’ve pushed onto the array:

function doArray() {
   var msg = [];
    msg.push({entryID : "test"});
    alert(msg[0]['entryID']);
}
doArray();

http://jsfiddle.net/CgbTC/

Try it with a console.log(msg) to see what you actually have:

http://jsfiddle.net/CgbTC/1/

Also, as tskuzzy notes, you can access using msg[0].entryID, as msg[0] will give you the object you’ve added to the array:

http://jsfiddle.net/CgbTC/3/