Setting an object proper by path

// var o = { success: true }
// Object.setByPath('data.person.name', o, 'Mike')
// => { success: true, data: { person: { name: 'Mike'} } }
Object.setByPath = function(path, obj, value) {
  var parts = path.split('.');
  return parts.reduce(function(prev, curr, ix) {
    return (ix + 1 == parts.length)
      ? prev[curr] = value
      : prev[curr] = prev[curr] || {};
  }, obj);
}