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确定一个对象是否具有相同的键

lodash typescript javascript

Nerdragen · 技术社区 · 5 年前

我想要一个接受操作数组的函数,将其与用户的操作列表进行比较,然后返回用户是否可以执行该操作。

所以基本上,考虑到:

const usersActions: { [key: string]: {[key: string]: boolean} } = {
      Bob: { eat: false, drink: false, sleep: true, walk: true },
      Alice: { eat: true, drink: true, sleep: true, walk: false }
};

enum Actions{
    Eat= 'eat',
    Drink= 'drink',
    Sleep= 'sleep',
    Walk= 'walk'
}

const verifyActions = (name: string, actions: Array<Actions>) => {
    return actions.every((action) => {
        return usersActions[name][action];
    });
}

console.log(verifyActions('Bob', [Actions.Eat, Actions.Sleep])); // false
console.log(verifyActions('Bob', [Actions.Sleep, Actions.Walk])); // true
console.log(verifyActions('Alice', [Actions.Drink, Actions.Eat, Actions.Sleep])); // true
console.log(verifyActions('Alice', [Actions.Sleep, Actions.Walk])); // false

这正是我所描述的,但是我忍不住想有更好的方法来做,比如比较数组和对象,或者用Lodash做一行代码?这让我的大脑有点不安,让我觉得有一种更优雅的方法。

谢谢您!

1 回复 | 直到 5 年前

Ori Drori 5 年前

return :

const usersActions = {
  Bob: { eat: false, drink: false, sleep: true, walk: true },
  Alice: { eat: true, drink: true, sleep: true, walk: false }
};

const Actions = {
  Eat: 'eat',
  Drink: 'drink',
  Sleep: 'sleep',
  Walk: 'walk'
}

const verifyActions = (name, actions) => actions.every((action) => usersActions[name][action]);

console.log(verifyActions('Bob', [Actions.Eat, Actions.Sleep])); // false
console.log(verifyActions('Bob', [Actions.Sleep, Actions.Walk])); // true
console.log(verifyActions('Alice', [Actions.Drink, Actions.Eat, Actions.Sleep])); // true
console.log(verifyActions('Alice', [Actions.Sleep, Actions.Walk])); // false

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js" integrity="sha512-90vH1Z83AJY9DmlWa8WkjkV79yfS2n2Oxhsi2dZbIv0nC4E6m5AbH8Nh156kkM7JePmqD6tcZsfad1ueoaovww==" crossorigin="anonymous"></script>

使用lodash,您可以从 userActions[name] 对象,然后检查是否所有 true 使用 _.every() . 然而,这并不能使它更具可读性或更短。

const usersActions = {
  Bob: { eat: false, drink: false, sleep: true, walk: true },
  Alice: { eat: true, drink: true, sleep: true, walk: false }
};

const Actions = {
  Eat: 'eat',
  Drink: 'drink',
  Sleep: 'sleep',
  Walk: 'walk'
}

const verifyActions = (name, actions) => _.every(_.pick(usersActions[name], actions))

console.log(verifyActions('Bob', [Actions.Eat, Actions.Sleep])); // false
console.log(verifyActions('Bob', [Actions.Sleep, Actions.Walk])); // true
console.log(verifyActions('Alice', [Actions.Drink, Actions.Eat, Actions.Sleep])); // true
console.log(verifyActions('Alice', [Actions.Sleep, Actions.Walk])); // false

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