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Fibonacci ES6 Generator
function *fibonacci(n) {
const infinite = !n && n !== 0;
let current = 0;
let next = 1;
while (infinite || n--) {
yield current;
[current, next] = [next, current + next];
}
}
function *fibonacci(n = null, current = 0, next = 1) {
if (n === 0) {
return current;
}
let m = n !== null ? n - 1 : null;
yield current;
yield *fibonacci(m, next, current + next);
}
let [...first10] = fibonacci(10);
console.log(first10);
// [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
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