test the existence of property in a deep object structure

Question

In javascript, lets say I want to access a property deep in an object, for example:

entry.mediaGroup[0].contents[0].url

At any point along that structure, a

Answer 1

I use this simple function for playing around with deep object properties:

getProperty = function(path) {
    try {
        return eval(path);
    }
    catch (e) {
        return undefined;
    }
};

Here's an example:

var test = {a:{b:{c:"success!"}}};

alert(getProperty('test.c.c'));
// undefined

alert(getProperty('test.a.b.c'));
// success!