converts a dot notation string into an object

dotNotationToObject.js

function dotNotationToObject (str) {
  var obj = {};
  var prev = null;

  str.split('.').forEach(function(prop){
    //console.log('prop', prop);
    if(prev) {
      //console.log('prev', prev);
     //obj = prev;
      prev[prop] = {};
      prev = prev[prop];
    } else {
      obj[prop] = {};
      prev = obj[prop];
    }
  });

  return obj;
}


var obj = dotNotationToObject('top.foo.bar.blah.ids');

console.log(JSON.stringify(obj, null, 2));

/*
// output

{
  "top": {
    "foo": {
      "bar": {
        "blah": {
          "ids": {}
        }
      }
    }
  }
}

*/

nice!