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44 lines (39 loc) · 918 Bytes
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Copy pathrecursion.js
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44 lines (39 loc) · 918 Bytes
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// Complete the following functions.
const nFibonacci = (n) => {
// fibonacci sequence: 1 2 3 5 8 13 ...
// return the nth number in the sequence
if (n <= 1) {
return 1;
}
return nFibonacci(n - 1) + nFibonacci(n - 2);
};
const nFactorial = (n) => {
// factorial example: !5 = 5 * 4 * 3 * 2 * 1
// return the factorial of `n`
if (n === 1) {
return 1;
}
return n * nFactorial(n - 1);
};
const checkMatchingLeaves = (obj) => {
// return true if every property on `obj` is the same
// otherwise return false
const newArr = [];
for (let i = 0; i < obj.length; i++) {
newArr.push(obj[i]);
}
for (let i = 0; i < obj.length; i++) {
for (let j = 0; j < newArr.length; j++) {
if (obj[i] === newArr[j]) {
return false;
}
}
}
return true;
};
/* eslint-enable no-unused-vars */
module.exports = {
nFibonacci,
nFactorial,
checkMatchingLeaves
};