Javascript:如何确定是否承诺功能? [英] Javascript: How to determine whether to promisefy a function?

问题描述

考虑一些小的辅助函数，其中一些显然是异步/诺言的候选者(据我所知):

Consider small helper functions, some of which are obvious candidates for async / promise (as I think I understand them):

exports.function processFile(file){
  return new Promise(resolve => {
    // super long processing of file
    resolve(file);
  });
}

与此同时:

exports.function addOne(number){
  return new Promise(resolve => {
    resolve(number + 1);
  });
}

似乎矫kill过正.

确定他们是否应履行其职责的规则是什么?

What is the rule by which one determines whether they should promise-fy their functions?

推荐答案

确定他们是否应履行其职责的规则是什么?

What is the rule by which one determines whether they should promise-fy their functions?

实际上很简单:

• 该函数执行异步操作时，应返回对结果的承诺
• 当函数仅执行同步操作时，它不应返回promise

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