How can I declare a variable inside a JavaScript function, so the following behavior happens?
The initialization should happen once.
function count() {
let_special count = 0;
count++;
if (count == 3) {
count = 5;
}
return count;
}
let a = count(); // a = 1
let b = count(); // a = 2
let c = count(); // a = 5
let d = count(); // a = 6
let e = count(); // a = 7
If I remember correctly, there was a way to do that but right now I can't find it on Google.
Thanks!
Declare a variable inside a JavaScript function that keeps its value on multiple calls to that function
You can’t. But you can declare a variable outside a function.
let count = 0;
function counter() {
count++;
if (count == 3) {
count = 5;
}
return count;
}
let a = counter(); // a = 1
let b = counter(); // b = 2
let c = counter(); // c = 5
let d = counter(); // d = 6
let e = counter(); // e = 7
Even if that variable is inside another function.
function makeCounter() {
let count = 0;
function counter() {
count++;
if (count == 3) {
count = 5;
}
return count;
}
return counter;
}
let count = makeCounter();
let count2 = makeCounter();
let a = count(); // a = 1
let b = count(); // b = 2
let c = count(); // c = 5
let d = count(); // d = 6
let e = count(); // e = 7
let f = count2(); // f = 1
let g = count2(); // g = 2
a = count(0); b = count(a); c = count(b)Just pass in a parameter.