📜  javascript array push element at index - Javascript代码示例

📅  最后修改于: 2022-03-11 15:02:46.548000             🧑  作者: Mango

代码示例2
// Be careful!

const arr = [ 1, 2, 3, 4 ];
arr[5] = 'Hello, world!';

console.log(arr); // [ 1, 2, 3, 4, <1 empty item>, 'Hello, world!' ]
console.log(arr.length); // 6