Underscore.js 1.7の使い方 Collections編 invert

var r = document.getElementById("r");
var result = _.invert({one: 1, two: 2, three: 3});
// =>  Object { 1="one", 2="two", 3="three"}
r.innerHTML = result[1] + ' ' + result[2] + ' ' + result[3];
// => one two three