2620. 计数器 - 闭包

Smile_slime_47
  2023-08-16 2023-08-16 Created  

Problem: 2620. 计数器 

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/**
 * @param {number} n
 * @return {Function} counter
 */
var createCounter = function(n) {
    var a=n;
    return function() {
        a=a+1;
        return a-1;
    };
};

/** 
 * const counter = createCounter(10)
 * counter() // 10
 * counter() // 11
 * counter() // 12
 */
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/**
 * @param {number} n
 * @return {Function} counter
 */
var createCounter = function(n) {
    var a=n;
    return function() {
        return a++;
    };
};

/** 
 * const counter = createCounter(10)
 * counter() // 10
 * counter() // 11
 * counter() // 12
 */
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/**
 * @param {number} n
 * @return {Function} counter
 */
var createCounter = function(n) {
    var a=n;
    return ()=>a++
};

/** 
 * const counter = createCounter(10)
 * counter() // 10
 * counter() // 11
 * counter() // 12
 */
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2620. 计数器 - 闭包