Underscore.js 1.7の使い方 Chaining編 chain

var r = document.getElementById("r");
var data = [
  {name: 'sato', age: 20},
  {name: 'suzuki', age: 30}
];
r.innerHTML =
  _.chain(data)
    .map(function(data) {
      return data.name + ' ' + data.age;
    })
    .first()
    .value();
// => sato 20