Javascript 将数组索引简化为参数

Question

我有以下 100% 工作的代码，但我不禁觉得它们是一种更好或更简单的编写方式，或者可能不是??所有的帮助总是感激的?? ??????

const entity: any = response.organisation;

if (Array.isArray(responseKey)) {
  // responseKey e.g. ['site', 'accounts']
  // I feel this two declarations can be refactored
  const list = this.flattenGraphqlList<T>(entity[responseKey[0]][responseKey[1]]);
  const {totalCount} = entity[responseKey[0]][responseKey[1]];

  return {list, totalCount};
}

const list = this.flattenGraphqlList<T>(entity[responseKey]);
const {totalCount} = entity[responseKey];

return {list, totalCount};

Answer 1

不要把所有事情都做两次：

const entity: any = response.organisation;

const object = Array.isArray(responseKey) 
  ? entity[responseKey[0]][responseKey[1]] // responseKey e.g. ['site', 'accounts']
  : entity[responseKey];

const list = this.flattenGraphqlList<T>(object);
const {totalCount} = object;
return {list, totalCount};

我猜你可以找到一个比object 更具描述性的名字:-)

对于最后几行，我个人不希望使用解构，但这更像是一种风格选择：

return {
  list: this.flattenGraphqlList<T>(object),
  totalCount: object.totalCount
};