哈希表 - 计数器 II

2665.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function createCounter(init) {
    let a = init;
    let increment = () => {
        a++;
        return a;
    };
    let decrement = () => {
        a--;
        return a;
    };
    let reset = () => {
        a = init;
        return a;
    };
    return {
        increment,
        decrement,
        reset
    };
}
;
let counter = createCounter(5);
console.log(counter.increment());
console.log(counter.increment());
console.log(counter.decrement());
console.log(counter.reset());
console.log(counter.increment());

2665.ts

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

function createCounter(init: number): Counter {
    let a=init
    let increment=()=>{
        a++
        return a
    }
    let decrement=()=>{
        a--
        return a
    }
    let reset=()=>{
        a=init
        return a
    }
    
    
    return {
        increment,
        decrement,
        reset
    }
};

let counter = createCounter(5)
console.log(counter.increment())
console.log(counter.increment())
console.log(counter.decrement())
console.log(counter.reset())
console.log(counter.increment())

源码地址

• JavaScript
• TypeScript