Lodash prototype.chain method

_.prototype.chain()

var _ = require('lodash');  
var users = [
   { 'user': 'Julie', 'age': 36 },
   { 'user': 'Robert',   'age': 40 }
];
 
var result = _(users)
   .chain()
   .head()
   .pick('user')
   .value();
console.log(result);

\>node tester.js

{ user: 'Julie' }