Read nested a nested property from an object given a key sequence string like 'location.x.elevation'

utils.readNested.js

function readNested(obj, keys) 
{
	var parts = keys.split('.'),
	    curr = obj;

	for (var i = 0; i < parts.length; i++)
	{
		if (!curr[parts[i]]) 
		{
			return null;
		}

		curr = curr[parts[i]];
	}

	return curr;
}