alcance js

Array.apply (null, {length: 6}) .map (Function.call, Number);

// es6
Array.from (new Array (6), (v, i) => i); // [0, 1, 2, 3, 4, 5]
Array.from (new Array (6), (v, i) => ++ i); // [1, 2, 3, 4, 5, 6]

Array.from (Array (6) .keys ())