Underscore.js 1.7の使い方 Collections編 invoke

var r = document.getElementById("r");
r.innerHTML = _.invoke([[3, 1, 2], [6, 4, 5]], 'sort');
// => [[1, 2, 3], [4, 5, 6]]

var r2 = document.getElementById("r2");
r2.innerHTML = _.invoke([[3, 1, 2], [6, 4, 5]], 'shift');
// => [3, 6]