30-seconds-of-code/snippets/fibonacci.md

title, tags

title	tags
fibonacci	math,array,beginner

Generates an array, containing the Fibonacci sequence, up until the nth term.

• Create an empty array of the specific length, initializing the first two values (0 and 1).
• Use Array.prototype.reduce() 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]