Array.apply(null, Array(5)).map(function (_, i) {return i;}); => [0, 1, 2, 3, 4]
[...Array(5).keys()]; => [0, 1, 2, 3, 4] String.fromCharCode(..._.range('A'.charCodeAt(0), 'D'.charCodeAt(0) + 1)); => "ABCD"