在不知道关键的情况下从对象获取价值

Question

I have item.124bn1353v = 'foo'

However the 124bn1353v key is dynamically generated but I need to get its value foo . How can I get the foo assuming that we have only one property in the item ?

Answer 1

If there is only one property set on the item object this will assign it to the variable foo :

var foo;
for (var prop in item) {
    if (item.hasOwnProperty(prop)) {
        foo = item[prop];
    }
}

Example JSFiddle - http://jsfiddle.net/VDyUe/