Two ways to crawl objects with an array of 'directions'. re: https://gist.github.com/1351684

gistfile1.js

var obj  = {a:{b:{c:':D'}}};
var path = ['a','b','c'];
var path2 = ['a','b','c'];
console.log(crawl(obj, path));
console.log(crawl2(obj, path2));

function crawl2(obj, keys) {
    while(keys.length) {
        obj = obj[keys.shift()];
    }
    return obj;
}


function crawl(obj, keys) {
    var key = keys.shift();
    return keys.length == 0 ? obj[key] : crawl(obj[key], keys);
}