2665. Counter II

Write a function createCounter. It should accept an initial integer init. It should return an object with three functions.

The three functions are:

• increment() increases the current value by 1 and then returns it.
• decrement() reduces the current value by 1 and then returns it.
• reset() sets the current value to init and then returns it.

解題思路：

因為我一值卡在輸出的時候 init 沒辦法更新數字，會直接，後來才在提示看到要先加一個 count

程式碼如下：

 const createCounter = function(init) {
    let currentCount = init;
    const counter = {
        increment: function() {
            currentCount++;
            return currentCount;
        },
        decrement: function() {
            currentCount--;
            return currentCount;
        },
        reset: function() {
            currentCount = init;
            return currentCount;
        }
    };
    return counter;
};