Array.from()
to create an empty array of the specific length, initializing the first two values (0
and 1
).Array.prototype.reduce()
and Array.prototype.concat()
to add values into the array, using the sum of the last two values, except for the first two.const fibonacci = n => Array.from({ length: n }).reduce( (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), [] );
fibonacci(6); // [0, 1, 1, 2, 3, 5]
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