这个 Lodash uniqBy 调用的 Ramda 等价物是什么？

Question

const data = [
{id: "001", failedReason: [1000]},
{id: "001", failedReason: [1001]},
{id: "001", failedReason: [1002]},
{id: "001", failedReason: [1000]},
{id: "001", failedReason: [1000, 1003]},
{id: "002", failedReason: [1000]}
];

给定这个数据集，如果我想返回具有唯一id值的对象数组，那么我可以使用 Lodash 简单地调用： _.uniqBy(data, 'id')

我知道使用此方法仅保留元素/匹配的第一次出现。

上面将返回：

[ { id: '001', failedReason: [ 1000 ] },
  { id: '002', failedReason: [ 1000 ] } ]

我是 Ramda 的新手。Ramda one-liner 与此等效的是什么？

R.uniqBy(???, data)

Answer 1

Ramda 不采用 lodash 风格，允许字符串作为函数的替代来获取对象的命名属性。所以只需传递一个函数：

const data = [
  {id: "001", failedReason: [1000]},
  {id: "001", failedReason: [1001]},
  {id: "001", failedReason: [1002]},
  {id: "001", failedReason: [1000]},
  {id: "001", failedReason: [1000, 1003]},
  {id: "002", failedReason: [1000]}
];

console.log(uniqBy(prop('id'), data))

<script src="https://bundle.run/ramda@0.26.1"></script><script>
const {uniqBy, prop} = ramda    </script>