RemoveArrayElementInForOfLoop.js

let a = [1, 2, 3, 4, 5]

for (let v of a) {
    if (v == 3) {
        a.splice(0, 2); // remove 2 element from index 0
        a = undefined; // for..of will have arrayname =a => undefined assignment will not affect for..of
    }
    console.log(v); 
}
console.log(a) // undefined

// Result:
// 1
// 2
// 3
// undefined

// => index will always increase and for..of stop when index >= array.length
// => when remove 2 elements from array when index = 2 (v =3) => next index(=3) >= array.length(=3)
// => remove array elements in for..of is not safe