Travis-黄景圣

```js const data = { '1':222, '2':123, '5':888 } const dataList = []; for (let i = 1; i

```js const key = 3; const arr1 = ['A1', 'A2', 'B1', 'B2','D1', 'D2', 'C1', 'C2']; const arr2 = ['A', 'B', 'C', 'D'].map(item => item + key); let result = [].concat(arr1,...

```js let list = [0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9]; list.sort((a, b) => a - b); for (let...

```js const list = [2, 10, 3, 4, 5, 11, 10, 11, 20]; const result = []; const range = 10; for (let i = 0; i < list.length; i++)...

想看下 `new Promise()` 中 `then` 和 `catch` 这个两个的传参变量定义