我的目標(biāo)是將 actual 推undefined送到一個數(shù)組，類似于new Array(). 現(xiàn)在，如果你使用array.push(undefined)它并用array.forEach(element => count++)它來計數(shù)，它仍然被算作元素。function test() { let object = [5,,,5,"hoomba"] object.push(undefined) let maxRetries = 0; object.forEach(element => maxRetries++); console.log(object); console.log(maxRetries);}test();預(yù)期結(jié)果：console.log(object) // [5, undefined, undefined, 5, "hoomba", undefined]console.log(maxRetries) // 3實際結(jié)果：console.log(object) // [5, undefined, undefined, 5, "hoomba", undefined]console.log(maxRetries) // 4
如何不使用 array.forEach(_ => count++) 計算 array.push？
湖上湖
2022-12-22 08:58:19
