Is there a method to search inside an object similar to methods for an array?

[VirtualVirgin]

Things like .indexOf() or .contains()
How can I find out if an object contains an element?

[d.healey]

@VirtualVirgin Good old fashioned loop.

inline function objectContains(key)
{
    local result = false;

    for (x in obj)
    {
        if (isDefined(x[key]))
            return true;
    }

    return result;
}

If you're just looking at the top level of the object then simply isDefined(obj[key])