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recursion.js
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31 lines (26 loc) · 776 Bytes
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// Complete the following functions.
const nFibonacci = (n) => {
// fibonacci sequence: 1 1 2 3 5 8 13 ...
// return the nth number in the sequence
// n - 6 (6th number in sequence is 8)... (n-1) + (n-2)... 5th + 4th... 5 + 3 = 8
return (n < 2) ? n : nFibonacci(n - 2) + nFibonacci(n - 1);
};
const nFactorial = (n) => {
// factorial example: !5 = 5 * 4 * 3 * 2 * 1
// return the factorial of `n`
let result = 1;
if (n === 1 || n === 0) return n;
result *= n * nFactorial(n - 1);
return result;
};
/* Extra Credit */
const checkMatchingLeaves = (obj) => {
// return true if every property on `obj` is the same
// otherwise return false
};
/* eslint-enable no-unused-vars */
module.exports = {
nFibonacci,
nFactorial,
checkMatchingLeaves,
};