Javascript 将数组索引简化为参数

Question

我有以下一段代码，它可以 100% 工作，但我情不自禁地觉得这是一种更好的方式或更简单的方式来编写此代码，或者可能不是 😄所有以及任何帮助总是值得赞赏的 👍🏼

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

不要做两次事情:

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};

我想你可以找到一个比object更具描述性的名称:-)

对于最后几行，我个人不喜欢使用解构，但这更多是一种风格选择:

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