deep-item-retriever.js

// Retrieve a deep item from obj, recursively
function getDeep (obj, addr) {
  if(typeof obj !== 'object' && !Array.isArray(obj))
    throw new TypeError("The Object argument must be an Object or an Array");
  if(typeof addr !== 'string' && !Array.isArray(addr))
    throw new TypeError("The Address argument must be a string or and array");

  // Split the dotted address into an array
  if(typeof addr === 'string') {
    addr = addr.split('.');
  }

  obj = obj[addr.splice(0, 1)[0]];
  // could also run obj() if it is a function
  if(addr.length > 0 && obj != null) {
    return getDeep(obj, addr);
  }
  return obj;
};