javascript - 使用 ramda 修改对象数组中的属性

Question

我正在尝试使用 ramda 从对象数组中删除一些属性。我有一系列属性需要删除，例如:

const colToHide = ['name', 'age']; 
// those properties are selected by the user 

我想从一组对象中删除属性 'name' 和 'age' (或任何用户选择的属性)。对象数组是这样的:

const person = [
  {name:'sam', age:'24', address:'xyz avenue', employed:true},
  {name:'john', age:'25', address:'xyz avenue', employed:true}
];

更新该对象数组的正确方法是什么？

Answer 1

您可以使用.omit()方法与 .map() 结合使用。像这样的事情:

const person = [
  {name:'sam', age:'24', address:'xyz avenue', employed:true},
  {name:'john', age:'25', address:'xyz avenue', employed:true}
]

const omitKeys = (keys, arr) => R.map(R.omit(keys), arr);

console.log(omitKeys(["name", "age"], person));

.as-console {background-color:black !important; color:lime;}
.as-console-wrapper {max-height:100% !important; top:0;}

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

更重要的是，您可以使用.compose()正如@ScottSauyet 在评论中建议的那样:

const omitKeys = R.compose(R.map, R.omit);

然后将其用作:

omitKeys(["name", "age"])(person);

const person = [
  {name:'sam', age:'24', address:'xyz avenue', employed:true},
  {name:'john', age:'25', address:'xyz avenue', employed:true}
]

const omitKeys = R.compose(R.map, R.omit);

console.log(omitKeys(["name", "age"])(person));

.as-console {background-color:black !important; color:lime;}
.as-console-wrapper {max-height:100% !important; top:0;}

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>