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2665. Counter II

https://leetcode.com/problems/counter-ii

Javascript​

var createCounter = function(init) {
    const origin = init
    let current = init

    return {
        increment: () => {
            return ++current
        },
        decrement: () => {
            return --current
        },
        reset: () => {
            current = init
            return current
        }
    }
};

Typescript​

type ReturnObj = {
    increment: () => number,
    decrement: () => number,
    reset: () => number,
}

var createCounter = function(init): ReturnObj {
    const origin = init
    let current = init

    return {
        increment: () => {
            return ++current
        },
        decrement: () => {
            return --current
        },
        reset: () => {
            current = init
            return current
        }
    }
};