[a,b] = [b, a+b] here not work , a b always 0 and 1.
If use a temp variable to swap the value ,that works.
function fibonacciSequence() {
let [a, b, arr] = [0, 1, []]
while (a <= 255) {
arr.concat(a)
[a, b] = [b, a + b]
console.log(a, b) // always 0 1
}
}
console.log(fibonacciSequence())The problem is that Automatic Semicolon Insertion isn't doing what you expect. It's not adding a semicolon between
arr.concat(a)
and
[a, b] = [b, a + b]
so it's being treated as if you wrote
arr.concat(a)[a, b] = [b, a + b]
Add all the semicolons explicitly and you get a correct result.
function fibonacciSequence() {
let [a, b, arr] = [0, 1, []];
while (a <= 255) {
arr.concat(a);
[a, b] = [b, a + b];
console.log(a, b); // always 0 1
}
}
console.log(fibonacciSequence())You can use the below function as well:
function fibonacciSequence() {
let [a, b] = [0, 1];
while (a <= 255) {
b = a + b;
a = b - a;
console.log(a,b);
}
}
fibonacciSequence();
arr.concat(a)[a, b]to mean?